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{"config":{"lang":["en"],"separator":"[\\s\\-]+","pipeline":["stopWordFilter"]},"docs":[{"location":"","title":"A PyTorch microframework for foundation model adaptation","text":"<p> <p>The simplest way to train and run adapters on top of foundation models.</p> <p> </p> <p>At the era of foundation models, adaptation is quickly rising at the method of choice for bridging the last mile quality gap. We couldn't find a framework with first class citizen APIs for foundation model adaptation, so we created one. It's called Refiners, and we're building it on top of PyTorch, in the open, under the MIT License. Read our manifesto.</p> <p></p>"},{"location":"concepts/chain/","title":"Chain","text":"<p>When we say models are implemented in a declarative way in Refiners, what this means in practice is they are implemented as Chains. <code>Chain</code> is a Python class to implement trees of modules. It is a subclass of Refiners' <code>Module</code>, which is in turn a subclass of PyTorch's <code>Module</code>. All inner nodes of a Chain are subclasses of <code>Chain</code>, and leaf nodes are subclasses of Refiners' <code>Module</code>.</p>"},{"location":"concepts/chain/#a-first-example","title":"A first example","text":"<p>To give you an idea of how it looks, let us take a simple convolution network to classify MNIST as an example. First, let us define a few variables.</p> <pre><code>img_res = 28\nchannels = 128\nkernel_size = 3\nhidden_layer_in = (((img_res - kernel_size + 1) // 2) ** 2) * channels\nhidden_layer_out = 200\noutput_size = 10\n</code></pre> <p>Now, here is the model in PyTorch:</p> <pre><code>class BasicModel(nn.Module):\n def __init__(self):\n super().__init__()\n self.conv = nn.Conv2d(1, channels, kernel_size)\n self.linear_1 = nn.Linear(hidden_layer_in, hidden_layer_out)\n self.maxpool = nn.MaxPool2d(2)\n self.linear_2 = nn.Linear(hidden_layer_out, output_size)\n\n def forward(self, x):\n x = self.conv(x)\n x = nn.functional.relu(x)\n x = self.maxpool(x)\n x = x.flatten(start_dim=1)\n x = self.linear_1(x)\n x = nn.functional.relu(x)\n x = self.linear_2(x)\n return nn.functional.softmax(x, dim=0)\n</code></pre> <p>And here is how we could implement the same model in Refiners:</p> <pre><code>class BasicModel(fl.Chain):\n def __init__(self):\n super().__init__(\n fl.Conv2d(1, channels, kernel_size),\n fl.ReLU(),\n fl.MaxPool2d(2),\n fl.Flatten(start_dim=1),\n fl.Linear(hidden_layer_in, hidden_layer_out),\n fl.ReLU(),\n fl.Linear(hidden_layer_out, output_size),\n fl.Lambda(lambda x: torch.nn.functional.softmax(x, dim=0)),\n )\n</code></pre> <p>Note</p> <p>We often use the namespace <code>fl</code> which means <code>fluxion</code>, which is the name of the part of Refiners that implements basic layers.</p> <p>As of writing, Refiners does not include a <code>Softmax</code> layer by default, but as you can see you can easily call arbitrary code using <code>fl.Lambda</code>. Alternatively, if you just wanted to write <code>Softmax()</code>, you could implement it like this:</p> <pre><code>class Softmax(fl.Module):\n def forward(self, x: torch.Tensor) -> torch.Tensor:\n return torch.nn.functional.softmax(x, dim=0)\n</code></pre> <p>Note</p> <p>Notice the type hints here. All of Refiners' codebase is typed, which makes it a pleasure to use if your downstream code is typed too.</p>"},{"location":"concepts/chain/#inspecting-and-manipulating","title":"Inspecting and manipulating","text":"<p>Let us instantiate the <code>BasicModel</code> we just defined and inspect its representation in a Python REPL:</p> <pre><code>>>> m = BasicModel()\n>>> m\n(CHAIN) BasicModel()\n \u251c\u2500\u2500 Conv2d(in_channels=1, out_channels=128, kernel_size=(3, 3), device=cpu, dtype=float32)\n \u251c\u2500\u2500 ReLU() #1\n \u251c\u2500\u2500 MaxPool2d(kernel_size=2, stride=2)\n \u251c\u2500\u2500 Flatten(start_dim=1)\n \u251c\u2500\u2500 Linear(in_features=21632, out_features=200, device=cpu, dtype=float32) #1\n \u251c\u2500\u2500 ReLU() #2\n \u251c\u2500\u2500 Linear(in_features=200, out_features=10, device=cpu, dtype=float32) #2\n \u2514\u2500\u2500 Softmax()\n</code></pre> <p>The children of a <code>Chain</code> are stored in a dictionary and can be accessed by name or index. When layers of the same type appear in the Chain, distinct suffixed keys are automatically generated.</p> <pre><code>>>> m[0]\nConv2d(in_channels=1, out_channels=128, kernel_size=(3, 3), device=cpu, dtype=float32)\n>>> m.Conv2d\nConv2d(in_channels=1, out_channels=128, kernel_size=(3, 3), device=cpu, dtype=float32)\n>>> m[6]\nLinear(in_features=200, out_features=10, device=cpu, dtype=float32)\n>>> m.Linear_2\nLinear(in_features=200, out_features=10, device=cpu, dtype=float32)\n</code></pre> <p>The Chain class includes several helpers to manipulate the tree. For instance, imagine I want to organize my model by wrapping each layer of the convnet in a subchain. Here is how I could do it:</p> <pre><code>class ConvLayer(fl.Chain):\n pass\n\nclass HiddenLayer(fl.Chain):\n pass\n\nclass OutputLayer(fl.Chain):\n pass\n\nm.insert(0, ConvLayer(m.pop(0), m.pop(0), m.pop(0)))\nm.insert_after_type(ConvLayer, HiddenLayer(m.pop(1), m.pop(1), m.pop(1)))\nm.append(OutputLayer(m.pop(2), m.pop(2)))\n</code></pre> <p>Did it work? Let's see:</p> <pre><code>>>> m\n(CHAIN) BasicModel()\n \u251c\u2500\u2500 (CHAIN) ConvLayer()\n \u2502 \u251c\u2500\u2500 Conv2d(in_channels=1, out_channels=128, kernel_size=(3, 3), device=cpu, dtype=float32)\n \u2502 \u251c\u2500\u2500 ReLU()\n \u2502 \u2514\u2500\u2500 MaxPool2d(kernel_size=2, stride=2)\n \u251c\u2500\u2500 (CHAIN) HiddenLayer()\n \u2502 \u251c\u2500\u2500 Flatten(start_dim=1)\n \u2502 \u251c\u2500\u2500 Linear(in_features=21632, out_features=200, device=cpu, dtype=float32)\n \u2502 \u2514\u2500\u2500 ReLU()\n \u2514\u2500\u2500 (CHAIN) OutputLayer()\n \u251c\u2500\u2500 Linear(in_features=200, out_features=10, device=cpu, dtype=float32)\n \u2514\u2500\u2500 Softmax()\n</code></pre> <p>Note</p> <p>Organizing models like this is actually a good idea, it makes them easier to understand and adapt.</p>"},{"location":"concepts/chain/#accessing-and-iterating","title":"Accessing and iterating","text":"<p>There are also many ways to access or iterate nodes even if they are deep in the tree. Most of them are implemented using a powerful iterator named <code>walk</code>. However, most of the time, you can use simpler helpers. For instance, to iterate all the modules in the tree that hold weights (the <code>Conv2d</code> and the <code>Linear</code>s), we can just do:</p> <pre><code>for x in m.layers(fl.WeightedModule):\n print(x)\n</code></pre> <p>It prints:</p> <pre><code>Conv2d(in_channels=1, out_channels=128, kernel_size=(3, 3), device=cpu, dtype=float32)\nLinear(in_features=21632, out_features=200, device=cpu, dtype=float32)\nLinear(in_features=200, out_features=10, device=cpu, dtype=float32)\n</code></pre>"},{"location":"concepts/context/","title":"Context","text":""},{"location":"concepts/context/#motivation-avoiding-props-drilling","title":"Motivation: avoiding \"props drilling\"","text":"<p>Chains are a powerful tool to represent computational graphs, but they are not always convenient.</p> <p>Many adapters add extra input to the model. For instance, ControlNet and T2i-Adapter require a guide (condition image), inpainting adapters require a mask, Latent Consistency Models use a condition scale embedding, other adapters may leverage time or context embeddings... Those inputs are often passed by the user in a high-level format (numbers, text...) and converted to embeddings by the model before being consumed in downstream layers.</p> <p>Managing this extra input is inconvenient. Typically, you would add them to the inputs and outputs of each layer somehow. But if you add them as channels or concatenate them you get composability issues, and if you try to pass them as extra arguments you end up needing to deal with them in layers that should not be concerned with their presence.</p> <p>The same kind of having to pass extra contextual information up and down a tree exists in other fields, and in particular in JavaScript frameworks that deal with a Virtual DOM such as React, where it is called \"props drilling\". To make it easier to manage, the Context API was introduced, and we went with a similar idea in Refiners.</p>"},{"location":"concepts/context/#a-simple-example","title":"A simple example","text":"<p>Here is an example of how contexts work:</p> <pre><code>from refiners.fluxion.context import Contexts\n\nclass MyProvider(fl.Chain):\n def init_context(self) -> Contexts:\n return {\"my context\": {\"my key\": None}}\n\nm = MyProvider(\n fl.Chain(\n fl.Sum(\n fl.UseContext(\"my context\", \"my key\"),\n fl.Lambda(lambda: 2),\n ),\n fl.SetContext(\"my context\", \"my key\"),\n ),\n fl.Chain(\n fl.UseContext(\"my context\", \"my key\"),\n fl.Lambda(print),\n ),\n)\n\nm.set_context(\"my context\", {\"my key\": 4})\nm() # prints 6\n</code></pre> <p>As you can see, to use the context, you define it by subclassing any <code>Chain</code> and defining <code>init_context</code>. You can set the context with the <code>set_context</code> method or the <code>SetContext</code> layer, and you can access it anywhere down the provider's tree with <code>UseContext</code>.</p>"},{"location":"concepts/context/#simplifying-complex-models-with-context","title":"Simplifying complex models with Context","text":"<p>Another use of the context is simplifying complex models, in particular those with long-range nested skip connections.</p> <p>To emulate this, let us consider this toy example with a structure somewhat similar to a U-Net:</p> <pre><code>square = lambda: fl.Lambda(lambda x: x ** 2)\nsqrt = lambda: fl.Lambda(lambda x: x ** 0.5)\n\nm1 = fl.Chain(\n fl.Residual(\n square(),\n fl.Residual(\n square(),\n fl.Residual(\n square(),\n ),\n sqrt(),\n ),\n sqrt(),\n ),\n sqrt(),\n)\n</code></pre> <p>You can see two problems here:</p> <ul> <li>nesting is increasing 1 lever with every residual, in a real case this would become unreadable;</li> <li>you could not isolate the part that computes the squares (similar to down blocks in a U-Net) from the part that computes the square roots (similar to up blocks in a U-Net).</li> </ul> <p>Let us solve those two issues using the context:</p> <pre><code>from refiners.fluxion.context import Contexts\n\nclass MyModel(fl.Chain):\n def init_context(self) -> Contexts:\n return {\"mymodel\": {\"residuals\": []}}\n\ndef push_residual():\n return fl.SetContext(\n \"mymodel\",\n \"residuals\",\n callback=lambda l, x: l.append(x),\n )\n\nclass ApplyResidual(fl.Sum):\n def __init__(self):\n super().__init__(\n fl.Identity(),\n fl.UseContext(\"mymodel\", \"residuals\").compose(lambda x: x.pop()),\n )\n\nsquares = fl.Chain(x for _ in range(3) for x in (push_residual(), square()))\nsqrts = fl.Chain(x for _ in range(3) for x in (ApplyResidual(), sqrt()))\nm2 = MyModel(squares, sqrts)\n</code></pre> <p>As you can see, despite <code>squares</code> and <code>sqrts</code> being completely independent chains, they can access the same context due to being nested under the same provider.</p> <p>Does it work?</p> <pre><code>>>> m1(2.0)\n2.5547711633552384\n>>> m2(2.0)\n2.5547711633552384\n</code></pre> <p>Yes!\u2728</p>"},{"location":"concepts/adapter/","title":"Adapter","text":"<p>Adapters are the final and most high-level abstraction in Refiners. They are the concept of adaptation turned into code.</p> <p>An Adapter is generally a Chain that replaces a Module (the target) in another Chain (the parent). Typically the target will become a child of the adapter.</p> <p>In code terms, <code>Adapter</code> is a generic mixin. Adapters subclass <code>type(parent)</code> and <code>Adapter[type(target)]</code>. For instance, if you adapt a <code>Conv2d</code> in a <code>Sum</code>, the definition of the Adapter could look like:</p> <pre><code>class MyAdapter(fl.Sum, fl.Adapter[fl.Conv2d]):\n ...\n</code></pre>"},{"location":"concepts/adapter/#a-simple-example-adapting-a-linear","title":"A simple example: adapting a Linear","text":"<p>Let us take a simple example to see how this works. Consider this model:</p> <p></p> <p>In code, it could look like this:</p> <pre><code>my_model = MyModel(fl.Chain(fl.Linear(), fl.Chain(...)))\n</code></pre> <p>Suppose we want to adapt the Linear to sum its output with the result of another chain. We can define and initialize an adapter like this:</p> <pre><code>class MyAdapter(fl.Sum, fl.Adapter[fl.Linear]):\n def __init__(self, target: fl.Linear) -> None:\n with self.setup_adapter(target):\n super().__init__(fl.Chain(...), target)\n\n# Find the target and its parent in the chain.\n# For simplicity let us assume it is the only Linear.\nfor target, parent in my_model.walk(fl.Linear):\n break\n\nadapter = MyAdapter(target)\n</code></pre> <p>The result is now this:</p> <p></p> <p>Note that the original chain is unmodified. You can still run inference on it as if the adapter did not exist. To use the adapter, you must inject it into the chain:</p> <pre><code>adapter.inject(parent)\n</code></pre> <p>The result will be:</p> <p></p> <p>Now if you run inference it will go through the Adapter. You can go back to the previous situation by calling <code>adapter.eject()</code>.</p>"},{"location":"concepts/adapter/#a-more-complicated-example-adapting-a-chain","title":"A more complicated example: adapting a Chain","text":"<p>We are not limited to adapting base modules, we can also adapt Chains.</p> <p>Starting from the same model as earlier, let us assume we want to:</p> <ul> <li>invert the order of the Linear and Chain B in Chain A ;</li> <li>replace the first child block of chain B with the original Chain A.</li> </ul> <p>This Adapter that will perform a <code>structural_copy</code> of part of its target, which means it will duplicate all Chain nodes but keep pointers to the same <code>WeightedModule</code>s, and hence not use extra GPU memory.</p> <pre><code>class MyAdapter(fl.Chain, fl.Adapter[fl.Chain]):\n def __init__(self, target: fl.Linear) -> None:\n with self.setup_adapter(target):\n new_b = fl.Chain(target, target.Chain.Chain_2.structural_copy())\n super().__init__(new_b, target.Linear)\n\nadapter = MyAdapter(my_model.Chain_1) # Chain A in the diagram\n</code></pre> <p>We end up with this:</p> <p></p> <p>We can now inject it into the original graph. It is not even needed to pass the parent this time, since Chains know their parents.</p> <pre><code>adapter.inject()\n</code></pre> <p>We obtain this:</p> <p></p> <p>Note that the Linear is in the Chain twice now, but that does not matter as long as you really want it to be the same Linear layer with the same weights.</p> <p>As before, we can call eject the adapter to go back to the original model.</p>"},{"location":"concepts/adapter/#a-real-world-example-loraadapter","title":"A real-world example: LoraAdapter","text":"<p>A popular example of adaptation is LoRA. You can check out how we implement it in Refiners.</p>"},{"location":"concepts/adapter/#higher-level-adapters","title":"Higher-level adapters","text":"<p>If you use Refiners, you will find Adapters that go beyond the simple definition given at the top of this page. Some adapters inject multiple smaller adapters in models, others implement helper methods to be used by their caller...</p> <p>From a bird's eye view, you can just consider Adapters as things you inject into models to adapt them, and that can be ejected to return the model to its original state. You will get a better feel for what is an adapter and how to leverage them by actually using the framework.</p>"},{"location":"getting-started/advanced/","title":"Advanced usage","text":""},{"location":"getting-started/advanced/#using-other-package-managers-pip-poetry","title":"Using other package managers (pip, Poetry...)","text":"<p>We use Rye to maintain and release Refiners but it conforms to the standard Python packaging guidelines and can be used with other package managers. Please refer to their respective documentation to figure out how to install a package from Git if you intend to use the development branch, as well as how to specify features.</p>"},{"location":"getting-started/advanced/#using-stable-releases-from-pypi","title":"Using stable releases from PyPI","text":"<p>Although we recommend using our development branch, we do publish more stable releases to PyPI and you are welcome to use them in your project. They are also available directly on the GitHub releases page. However, beware that the format of weights can be different from the current state of the development branch.</p>"},{"location":"getting-started/recommended/","title":"Recommended usage","text":"<p>Refiners is still a young project and development is active, so to use the latest and greatest version of the framework we recommend you use the <code>main</code> branch from our development repository.</p> <p>Moreover, we recommend using Rye which simplifies several things related to Python package management, so start by following the instructions to install it on your system.</p>"},{"location":"getting-started/recommended/#installing","title":"Installing","text":"<p>To try Refiners, clone the GitHub repository and install it with all optional features:</p> <pre><code>git clone git@github.com:finegrain-ai/refiners.git\ncd refiners\nrye sync --all-features\n</code></pre>"},{"location":"getting-started/recommended/#converting-weights","title":"Converting weights","text":"<p>The format of state dicts used by Refiners is custom, so to use pretrained models you will need to convert weights. We provide conversion tools and pre-converted weights on our HuggingFace organization for popular models.</p> <p>For instance, to use the autoencoder from Stable Diffusion 1.5:</p>"},{"location":"getting-started/recommended/#use-pre-converted-weights","title":"Use pre-converted weights","text":"<pre><code>from huggingface_hub import hf_hub_download\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_1.model import SD1Autoencoder\n\n# download the pre-converted weights from the hub\nsafetensors_path = hf_hub_download(\n repo_id=\"refiners/sd15.autoencoder\",\n filename=\"model.safetensors\",\n revision=\"9ce6af42e21fce64d74b1cab57a65aea82fd40ea\", # optional\n)\n\n# initialize the model\nmodel = SD1Autoencoder()\n\n# load the pre-converted weights\nmodel.load_from_safetensors(safetensors_path)\n</code></pre>"},{"location":"getting-started/recommended/#convert-the-weights-yourself","title":"Convert the weights yourself","text":"<p>If you want to convert the weights yourself, you can use the conversion tools we provide.</p> <pre><code>from refiners.conversion import autoencoder_sd15\n\n# This function will:\n# - download the original weights from the internet, and save them to disk at a known location\n# (e.g. tests/weights/stable-diffusion-v1-5/stable-diffusion-v1-5/vae/diffusion_pytorch_model.safetensors)\n# - convert them to the refiners format, and save them to disk at a known location\n# (e.g. tests/weights/refiners/sd15.autoencoder/model.safetensors)\nautoencoder_sd15.runwayml.convert()\n\n# get the path to the converted weights\nsafetensors_path = autoencoder_sd15.runwayml.converted.local_path\n\n# initialize the model\nmodel = SD1Autoencoder()\n\n# load the converted weights\nmodel.load_from_safetensors(safetensors_path)\n</code></pre> <p>Note</p> <p>If you need to convert more model weights or all of them, check out the <code>refiners.conversion</code> module.</p> <p>Warning</p> <p>Converting all the weights requires a lot of disk space and CPU time, so be prepared. Currently downloading all the original weights takes around ~100GB of disk space, and converting them all takes around ~70GB of disk space.</p> <p>Warning</p> <p>Some conversion scripts may also require quite a bit of RAM, since they load the entire weights in memory, ~16GB of RAM should be enough for most models, but some models may require more.</p>"},{"location":"getting-started/recommended/#testing-the-conversion","title":"Testing the conversion","text":"<p>To quickly check that the weights you got from the hub or converted yourself are correct, you can run the following snippet:</p> <pre><code>from PIL import Image\nfrom refiners.fluxion.utils import no_grad\n\nimage = Image.open(\"input.png\")\n\nwith no_grad():\n latents = model.image_to_latents(image)\n decoded = model.latents_to_image(latents)\n\ndecoded.save(\"output.png\")\n</code></pre> <p>Inspect <code>output.png</code>, if the converted weights are correct, it should be similar to <code>input.png</code> (but have a few differences).</p>"},{"location":"getting-started/recommended/#using-refiners-in-your-own-project","title":"Using Refiners in your own project","text":"<p>So far you used Refiners as a standalone package, but if you want to create your own project using it as a dependency here is how you can proceed:</p> <pre><code>rye init --py \"3.11\" myproject\ncd myproject\nrye add refiners@git+https://github.com/finegrain-ai/refiners\nrye sync\n</code></pre> <p>If you intend to use Refiners for training, you can install the <code>training</code> feature:</p> <pre><code>rye add refiners[training]@git+https://github.com/finegrain-ai/refiners\n</code></pre> <p>Similarly, if you need to use the conversion tools we provide, you install the <code>conversion</code> feature:</p> <pre><code>rye add refiners[conversion]@git+https://github.com/finegrain-ai/refiners\n</code></pre> <p>Note</p> <p>You can install multiple features at once by separating them with a comma:</p> <pre><code>rye add refiners[training,conversion]@git+https://github.com/finegrain-ai/refiners\n</code></pre>"},{"location":"getting-started/recommended/#whats-next","title":"What's next?","text":"<p>We suggest you check out the guides section to dive into the usage of Refiners, of the Key Concepts section for a better understanding of how the framework works.</p>"},{"location":"guides/adapting_sdxl/","title":"Adapting Stable Diffusion XL","text":"<p>Stable Diffusion XL (SDXL) is a very popular text-to-image open source foundation model. This guide will show you how to boost its capabilities with Refiners, using iconic adapters the framework supports out-of-the-box (i.e. without the need for tedious prompt engineering). We'll follow a step by step approach, progressively increasing the number of adapters involved to showcase how simple adapter composition is using Refiners. Our use case will be the generation of an image with \"a futuristic castle surrounded by a forest, mountains in the background\".</p>"},{"location":"guides/adapting_sdxl/#baseline","title":"Baseline","text":"<p>Make sure that Refiners is installed in your local environment (see Getting started), and that you have access to a decent GPU (~24 GB VRAM should be enough).</p> <p>Before diving into the adapters themselves, let's establish a baseline by simply prompting SDXL with Refiners.</p> <p>Reminder</p> <p>A StableDiffusion model is composed of three modules:</p> <ul> <li>An Autoencoder, responsible for embedding images into a latent space</li> <li>A UNet, responsible for the diffusion process</li> <li>A Text Encoder, responsible for encoding the user prompt which will guide the diffusion process.</li> </ul> <p>Start by instantiating a <code>StableDiffusion_XL</code> model and load the weights.</p> <pre><code>import torch\nfrom huggingface_hub import hf_hub_download\n\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_xl import StableDiffusion_XL\n\n# instantiate SDXL model\nsdxl = StableDiffusion_XL(\n device=\"cuda\", # use GPU\n dtype=torch.float16 # use half-precision for memory efficiency\n)\n\n# Load the weights\nsdxl.clip_text_encoder.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.text_encoder\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.unet.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.unet\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.lda.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.autoencoder_fp16fix\",\n filename=\"model.safetensors\",\n )\n)\n</code></pre> <p>Then, define the inference parameters by setting the appropriate prompt, seed and number of inference steps:</p> <pre><code># hyperparameters\nseed = 42\nnum_inference_steps = 50\nprompt = \"a futuristic castle surrounded by a forest, mountains in the background\"\nsdxl.set_inference_steps(num_inference_steps, first_step=0)\n\n# enable self-attention guidance to enhance the quality of the generated images\nsag_scale = 0.75\nsdxl.set_self_attention_guidance(enable=True, scale=sag_scale)\n</code></pre> <p>Finally, define and run the inference process:</p> <pre><code>from refiners.fluxion.utils import manual_seed, no_grad\nfrom tqdm import tqdm\n\nwith no_grad(): # disable gradient calculation for memory-efficient inference\n # encode the text prompts to embeddings, and get the time_ids\n clip_text_embedding, pooled_text_embedding = sdxl.compute_clip_text_embedding(\n text=prompt + \", best quality, high quality\",\n negative_text=\"monochrome, lowres, bad anatomy, worst quality, low quality\",\n )\n time_ids = sdxl.default_time_ids\n\n # seed the random number generator, for reproducibility\n manual_seed(seed)\n\n # SDXL typically generates 1024x1024, here we use a higher resolution\n x = sdxl.init_latents((2048, 2048))\n\n # diffusion denoising process\n for step in tqdm(sdxl.steps):\n x = sdxl(\n x,\n step=step,\n clip_text_embedding=clip_text_embedding,\n pooled_text_embedding=pooled_text_embedding,\n time_ids=time_ids,\n )\n predicted_image = sdxl.lda.latents_to_image(x)\n\npredicted_image.save(\"vanilla_sdxl.png\")\n</code></pre> Expand to see the entire end-to-end code <pre><code>import torch\nfrom huggingface_hub import hf_hub_download\nfrom tqdm import tqdm\n\nfrom refiners.fluxion.utils import manual_seed, no_grad\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_xl import StableDiffusion_XL\n\n# instantiate SDXL model\nsdxl = StableDiffusion_XL(\n device=\"cuda\", # use GPU\n dtype=torch.float16 # use half-precision for memory efficiency\n)\n\n# Load the weights\nsdxl.clip_text_encoder.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.text_encoder\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.unet.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.unet\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.lda.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.autoencoder_fp16fix\",\n filename=\"model.safetensors\",\n )\n)\n\n# hyperparameters\nseed = 42\nnum_inference_steps = 50\nprompt = \"a futuristic castle surrounded by a forest, mountains in the background\"\nsdxl.set_inference_steps(num_inference_steps, first_step=0)\n\n# enable self-attention guidance to enhance the quality of the generated images\nsag_scale = 0.75\nsdxl.set_self_attention_guidance(enable=True, scale=sag_scale)\n\nwith no_grad(): # disable gradient calculation for memory-efficient inference\n # encode the text prompts to embeddings, and get the time_ids\n clip_text_embedding, pooled_text_embedding = sdxl.compute_clip_text_embedding(\n text=prompt + \", best quality, high quality\",\n negative_text=\"monochrome, lowres, bad anatomy, worst quality, low quality\",\n )\n time_ids = sdxl.default_time_ids\n\n # seed the random number generator, for reproducibility\n manual_seed(seed)\n\n # SDXL typically generates 1024x1024, here we use a higher resolution\n x = sdxl.init_latents((2048, 2048))\n\n # diffusion denoising process\n for step in tqdm(sdxl.steps):\n x = sdxl(\n x,\n step=step,\n clip_text_embedding=clip_text_embedding,\n pooled_text_embedding=pooled_text_embedding,\n time_ids=time_ids,\n )\n predicted_image = sdxl.lda.latents_to_image(x)\n\npredicted_image.save(\"vanilla_sdxl.png\")\n</code></pre> <p>The resulting image should look like this:</p> Generated image of a castle using default SDXL weights. <p>It is not really what we prompted the model for, unfortunately. To get a more futuristic-looking castle, you can either go for tedious prompt engineering, or use a pretrainered LoRA tailored to our use case, like the Sci-fi Environments LoRA available on Civitai. We'll now show you how the LoRA option works with Refiners.</p>"},{"location":"guides/adapting_sdxl/#single-lora","title":"Single LoRA","text":"<p>Let's use the Sci-fi Environments LoRA. LoRas don't need to be converted, all you have to do is download the safetensors file from the internet.</p> <p>You can easily download the LoRA by doing: <pre><code>curl -L -o scifi.safetensors 'https://civitai.com/api/download/models/140624?type=Model&format=SafeTensor'\n</code></pre></p> <p>Inject the LoRA into SDXL using <code>SDLoraManager</code> right after instantiating <code>StableDiffusion_XL</code>:</p> <pre><code>from refiners.fluxion.utils import load_from_safetensors\nfrom refiners.foundationals.latent_diffusion.lora import SDLoraManager\n\n# Load LoRA weights from disk and inject them into target\nmanager = SDLoraManager(sdxl)\nscifi_lora_weights = load_from_safetensors(\"scifi.safetensors\")\nmanager.add_loras(\"scifi\", tensors=scifi_lora_weights)\n</code></pre> Expand to see the entire end-to-end code <pre><code>import torch\nfrom huggingface_hub import hf_hub_download\nfrom tqdm import tqdm\n\nfrom refiners.fluxion.utils import load_from_safetensors, manual_seed, no_grad\nfrom refiners.foundationals.latent_diffusion.lora import SDLoraManager\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_xl import StableDiffusion_XL\n\n# instantiate SDXL model\nsdxl = StableDiffusion_XL(\n device=\"cuda\", # use GPU\n dtype=torch.float16 # use half-precision for memory efficiency\n)\n\n# Load the weights\nsdxl.clip_text_encoder.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.text_encoder\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.unet.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.unet\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.lda.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.autoencoder_fp16fix\",\n filename=\"model.safetensors\",\n )\n)\n\n# add Sci-Fi LoRA\nmanager = SDLoraManager(sdxl)\nscifi_lora_weights = load_from_safetensors(\"scifi.safetensors\")\nmanager.add_loras(\"scifi\", tensors=scifi_lora_weights)\n\n# hyperparameters\nseed = 42\nnum_inference_steps = 50\nprompt = \"a futuristic castle surrounded by a forest, mountains in the background\"\nsdxl.set_inference_steps(num_inference_steps, first_step=0)\n\n# enable self-attention guidance to enhance the quality of the generated images\nsag_scale = 0.75\nsdxl.set_self_attention_guidance(enable=True, scale=sag_scale)\n\nwith no_grad(): # disable gradient calculation for memory-efficient inference\n # encode the text prompts to embeddings, and get the time_ids\n clip_text_embedding, pooled_text_embedding = sdxl.compute_clip_text_embedding(\n text=prompt + \", best quality, high quality\",\n negative_text=\"monochrome, lowres, bad anatomy, worst quality, low quality\",\n )\n time_ids = sdxl.default_time_ids\n\n # seed the random number generator, for reproducibility\n manual_seed(seed)\n\n # SDXL typically generates 1024x1024, here we use a higher resolution\n x = sdxl.init_latents((2048, 2048))\n\n # diffusion denoising process\n for step in tqdm(sdxl.steps):\n x = sdxl(\n x,\n step=step,\n clip_text_embedding=clip_text_embedding,\n pooled_text_embedding=pooled_text_embedding,\n time_ids=time_ids,\n )\n\n # decode the latents to an image\n predicted_image = sdxl.lda.decode_latents(x)\n\npredicted_image.save(\"scifi_sdxl.png\")\n</code></pre> <p>You should get something like this - pretty neat, isn't it?</p> Generated image of a castle in sci-fi style."},{"location":"guides/adapting_sdxl/#multiple-loras","title":"Multiple LoRAs","text":"<p>Continuing with our futuristic castle example, we might want to turn it, for instance, into a pixel art.</p> <p>Again, we could either try some tedious prompt engineering, or instead use another LoRA found on the web, such as Pixel Art LoRA, found on Civitai.</p> <p>You can easily download the LoRA by doing: <pre><code>curl -L -o pixelart.safetensors 'https://civitai.com/api/download/models/135931?type=Model&format=SafeTensor'\n</code></pre></p> <p>Injecting a second LoRA into the current SDXL model is dead simple, as <code>SDLoraManager</code> allows loading multiple LoRAs:</p> <pre><code># load LoRAs weights from disk and inject them into target\nmanager = SDLoraManager(sdxl)\nmanager.add_loras(\"scifi-lora\", load_from_safetensors(\"scifi.safetensors\"))\nmanager.add_loras(\"pixel-art-lora\", load_from_safetensors(\"pixelart.safetensors\"))\n</code></pre> <p>Adapters such as LoRAs also have a scale (roughly) quantifying the effect of this Adapter. Refiners allows setting different scales for each Adapter, allowing the user to balance the effect of each Adapter:</p> <pre><code># load LoRAs weights from disk and inject them into target\nmanager = SDLoraManager(sdxl)\nmanager.add_loras(\"scifi-lora\", load_from_safetensors(\"scifi.safetensors\"), scale=1.0)\nmanager.add_loras(\"pixel-art-lora\", load_from_safetensors(\"pixelart.safetensors\"), scale=1.4)\n</code></pre> Expand to see the entire end-to-end code <pre><code>import torch\nfrom huggingface_hub import hf_hub_download\nfrom tqdm import tqdm\n\nfrom refiners.fluxion.utils import load_from_safetensors, manual_seed, no_grad\nfrom refiners.foundationals.latent_diffusion.lora import SDLoraManager\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_xl import StableDiffusion_XL\n\n# instantiate SDXL model\nsdxl = StableDiffusion_XL(\n device=\"cuda\", # use GPU\n dtype=torch.float16 # use half-precision for memory efficiency\n)\n\n# Load the weights\nsdxl.clip_text_encoder.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.text_encoder\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.unet.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.unet\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.lda.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.autoencoder_fp16fix\",\n filename=\"model.safetensors\",\n )\n)\n\n# add Sci-Fi and Pixel-Art LoRAs\nmanager = SDLoraManager(sdxl)\nmanager.add_loras(\"scifi-lora\", load_from_safetensors(\"scifi.safetensors\"), scale=1.0)\nmanager.add_loras(\"pixel-art-lora\", load_from_safetensors(\"pixelart.safetensors\"), scale=1.4)\n\n# hyperparameters\nseed = 42\nnum_inference_steps = 50\nprompt = \"a futuristic castle surrounded by a forest, mountains in the background\"\nsdxl.set_inference_steps(num_inference_steps, first_step=0)\n\n# enable self-attention guidance to enhance the quality of the generated images\nsag_scale = 0.75\nsdxl.set_self_attention_guidance(enable=True, scale=sag_scale)\n\nwith no_grad(): # disable gradient calculation for memory-efficient inference\n # encode the text prompts to embeddings, and get the time_ids\n clip_text_embedding, pooled_text_embedding = sdxl.compute_clip_text_embedding(\n text=prompt + \", best quality, high quality\",\n negative_text=\"monochrome, lowres, bad anatomy, worst quality, low quality\",\n )\n time_ids = sdxl.default_time_ids\n\n # seed the random number generator, for reproducibility\n manual_seed(seed)\n\n # SDXL typically generates 1024x1024, here we use a higher resolution\n x = sdxl.init_latents((2048, 2048))\n\n # diffusion denoising process\n for step in tqdm(sdxl.steps):\n x = sdxl(\n x,\n step=step,\n clip_text_embedding=clip_text_embedding,\n pooled_text_embedding=pooled_text_embedding,\n time_ids=time_ids,\n )\n predicted_image = sdxl.lda.latents_to_image(x)\n\npredicted_image.save(\"scifi_pixel_sdxl.png\")\n</code></pre> <p>The results are looking great:</p> Generated image of a castle in sci-fi, pixel art style."},{"location":"guides/adapting_sdxl/#multiple-loras-ip-adapter","title":"Multiple LoRAs + IP-Adapter","text":"<p>Refiners really shines when it comes to composing different Adapters to fully exploit the possibilities of foundation models.</p> <p>For instance, IP-Adapter (covered in a previous blog post) is a common choice for practictioners wanting to guide the diffusion process towards a specific prompt image.</p> <p>In our example, we would like to guide the diffusion process to align with this image of the Neuschwanstein Castle:</p> Credits: Bayerische Schl\u00f6sserverwaltung, Anton Brandl <p>You can easily download the above image by doing:</p> <pre><code>curl -O https://refine.rs/guides/adapting_sdxl/german-castle.jpg\n</code></pre> <p>Instantiate a <code>SDXLIPAdapter</code> targeting our <code>sdxl.unet</code>, and inject it using a simple <code>.inject()</code> call:</p> <pre><code>from refiners.foundationals.latent_diffusion.stable_diffusion_xl.image_prompt import SDXLIPAdapter\n\n# load IP-Adapter\nip_adapter = SDXLIPAdapter(\n target=sdxl.unet,\n weights=load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.ip_adapter.plus\",\n filename=\"model.safetensors\",\n ),\n ),\n scale=1.0,\n fine_grained=True, # Use fine-grained IP-Adapter (i.e IP-Adapter Plus)\n)\nip_adapter.clip_image_encoder.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sd21.unclip.image_encoder\",\n filename=\"model.safetensors\",\n )\n)\nip_adapter.inject()\n</code></pre> <p>Then, at runtime, we simply compute the embedding of the image prompt through the <code>ip_adapter</code> object, and set its embedding calling <code>.set_clip_image_embedding()</code>:</p> <pre><code>from PIL import Image\nimage_prompt = Image.open(\"german-castle.jpg\")\n\nwith torch.no_grad():\n clip_image_embedding = ip_adapter.compute_clip_image_embedding(ip_adapter.preprocess_image(image_prompt))\n ip_adapter.set_clip_image_embedding(clip_image_embedding)\n\n# And start the diffusion process\n</code></pre> <p>Note</p> <p>Be wary that composing Adapters (especially ones of different natures, such as LoRAs and IP-Adapter) can be tricky, as their respective effects can be adversarial. This is visible in our example below. In the code below, we tuned the LoRAs scales respectively to <code>1.5</code> and <code>1.55</code>. We invite you to try and test different seeds and scales to find the perfect combination! Furthermore, the order in which you inject adapters can also have an impact on the final result.</p> Expand to see the entire end-to-end code <pre><code>import torch\nfrom huggingface_hub import hf_hub_download\nfrom PIL import Image\nfrom tqdm import tqdm\n\nfrom refiners.fluxion.utils import load_from_safetensors, manual_seed, no_grad\nfrom refiners.foundationals.latent_diffusion.lora import SDLoraManager\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_xl import StableDiffusion_XL\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_xl.image_prompt import SDXLIPAdapter\n\n# instantiate SDXL model\nsdxl = StableDiffusion_XL(\n device=\"cuda\", # use GPU\n dtype=torch.float16 # use half-precision for memory efficiency\n)\n\n# Load the weights\nsdxl.clip_text_encoder.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.text_encoder\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.unet.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.unet\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.lda.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.autoencoder_fp16fix\",\n filename=\"model.safetensors\",\n )\n)\n\n# hyperparameters\nseed = 42\nnum_inference_steps = 50\nprompt = \"a futuristic castle surrounded by a forest, mountains in the background\"\nsdxl.set_inference_steps(num_inference_steps, first_step=0)\n\n# enable self-attention guidance to enhance the quality of the generated images\nsag_scale = 0.75\nsdxl.set_self_attention_guidance(enable=True, scale=sag_scale)\n\n# add Sci-Fi and Pixel-Art LoRAs\nmanager = SDLoraManager(sdxl)\nmanager.add_loras(\"scifi-lora\", load_from_safetensors(\"scifi.safetensors\"), scale=1.5)\nmanager.add_loras(\"pixel-art-lora\", load_from_safetensors(\"pixelart.safetensors\"), scale=1.55)\n\n# Instantiate the IP-Adapter\nip_adapter = SDXLIPAdapter(\n target=sdxl.unet,\n weights=load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.ip_adapter.plus\",\n filename=\"model.safetensors\",\n ),\n ),\n scale=1.0,\n fine_grained=True, # Use fine-grained IP-Adapter (i.e IP-Adapter Plus)\n)\nip_adapter.clip_image_encoder.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sd21.unclip.image_encoder\",\n filename=\"model.safetensors\",\n )\n)\nip_adapter.inject()\n\n# load image prompt\nimage_prompt = Image.open(\"german-castle.jpg\")\n\nwith no_grad(): # disable gradient calculation for memory-efficient inference\n # encode the text prompts to embeddings, and get the time_ids\n clip_text_embedding, pooled_text_embedding = sdxl.compute_clip_text_embedding(\n text=prompt + \", best quality, high quality\",\n negative_text=\"monochrome, lowres, bad anatomy, worst quality, low quality\",\n )\n time_ids = sdxl.default_time_ids\n\n # compute image prompt embeddings\n clip_image_embedding = ip_adapter.compute_clip_image_embedding(ip_adapter.preprocess_image(image_prompt))\n ip_adapter.set_clip_image_embedding(clip_image_embedding)\n\n # seed the random number generator, for reproducibility\n manual_seed(seed)\n\n # SDXL typically generates 1024x1024\n x = sdxl.init_latents((1024, 1024))\n\n # diffusion denoising process\n for step in tqdm(sdxl.steps):\n x = sdxl(\n x,\n step=step,\n clip_text_embedding=clip_text_embedding,\n pooled_text_embedding=pooled_text_embedding,\n time_ids=time_ids,\n )\n predicted_image = sdxl.lda.latents_to_image(x)\n\npredicted_image.save(\"scifi_pixel_IP_sdxl.png\")\n</code></pre> <p>The result looks convincing: we do get a pixel-art, futuristic-looking Neuschwanstein castle!</p> Generated image in sci-fi, pixel art style, using IP-Adapter."},{"location":"guides/adapting_sdxl/#multiple-loras-ip-adapter-t2i-adapter","title":"Multiple LoRAs + IP-Adapter + T2I-Adapter","text":"<p>T2I-Adapters are a powerful class of Adapters aiming at controlling the Text-to-Image (T2I) diffusion process with external control signals, such as canny edges or pose estimations inputs. In this section, we will compose our previous example with the Depth-Zoe Adapter, providing a depth condition to the diffusion process using the following depth map as input signal:</p> Input depth map of the initial castle image. <p>You can easily download the above image by doing:</p> <pre><code>curl -O https://refine.rs/guides/adapting_sdxl/zoe-depth-map-german-castle.png\n</code></pre> <p>Then, just inject it as usual:</p> <pre><code>from refiners.foundationals.latent_diffusion.stable_diffusion_xl.t2i_adapter import SDXLT2IAdapter\n\n# Load T2I-Adapter\nt2i_adapter = SDXLT2IAdapter(\n target=sdxl.unet,\n name=\"zoe-depth\",\n weights=load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.t2i_adapter.depth.zoe\",\n filename=\"model.safetensors\",\n ),\n ),\n scale=0.72,\n).inject()\n</code></pre> <p>Finally, at runtime, compute the embedding of the input condition through the <code>t2i_adapter</code> object, and set its embedding calling <code>.set_condition_features()</code>:</p> <pre><code>from refiners.fluxion.utils import image_to_tensor, interpolate\n\nimage_depth_condition = Image.open(\"zoe-depth-map-german-castle.png\")\n\nwith torch.no_grad():\n condition = image_to_tensor(image_depth_condition.convert(\"RGB\"), device=sdxl.device, dtype=sdxl.dtype)\n # Spatial dimensions should be divisible by default downscale factor (=16 for T2IAdapter ConditionEncoder)\n condition = interpolate(condition, torch.Size((1024, 1024)))\n t2i_adapter.set_condition_features(features=t2i_adapter.compute_condition_features(condition))\n</code></pre> Expand to see the entire end-to-end code <pre><code>import torch\nfrom huggingface_hub import hf_hub_download\nfrom PIL import Image\nfrom tqdm import tqdm\n\nfrom refiners.fluxion.utils import image_to_tensor, interpolate, load_from_safetensors, manual_seed, no_grad\nfrom refiners.foundationals.latent_diffusion.lora import SDLoraManager\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_xl import StableDiffusion_XL\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_xl.image_prompt import SDXLIPAdapter\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_xl.t2i_adapter import SDXLT2IAdapter\n\n# instantiate SDXL model\nsdxl = StableDiffusion_XL(\n device=\"cuda\", # use GPU\n dtype=torch.float16 # use half-precision for memory efficiency\n)\n\n# Load the weights\nsdxl.clip_text_encoder.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.text_encoder\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.unet.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.unet\",\n filename=\"model.safetensors\",\n )\n)\nsdxl.lda.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.autoencoder_fp16fix\",\n filename=\"model.safetensors\",\n )\n)\n\n# hyperparameters\nseed = 42\nnum_inference_steps = 50\nprompt = \"a futuristic castle surrounded by a forest, mountains in the background\"\nsdxl.set_inference_steps(num_inference_steps, first_step=0)\n\n# enable self-attention guidance to enhance the quality of the generated images\nsag_scale = 0.75\nsdxl.set_self_attention_guidance(enable=True, scale=sag_scale)\n\n# add Sci-Fi and Pixel-Art LoRAs\nmanager = SDLoraManager(sdxl)\nmanager.add_loras(\"scifi-lora\", load_from_safetensors(\"scifi.safetensors\"), scale=1.5)\nmanager.add_loras(\"pixel-art-lora\", load_from_safetensors(\"pixelart.safetensors\"), scale=1.55)\n\n# Instantiate the IP-Adapter\nip_adapter = SDXLIPAdapter(\n target=sdxl.unet,\n weights=load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.ip_adapter.plus\",\n filename=\"model.safetensors\",\n ),\n ),\n scale=1.0,\n fine_grained=True, # Use fine-grained IP-Adapter (i.e IP-Adapter Plus)\n)\nip_adapter.clip_image_encoder.load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sd21.unclip.image_encoder\",\n filename=\"model.safetensors\",\n )\n)\nip_adapter.inject()\n\n# Load T2I-Adapter\nt2i_adapter = SDXLT2IAdapter(\n target=sdxl.unet,\n name=\"zoe-depth\",\n weights=load_from_safetensors(\n hf_hub_download(\n repo_id=\"refiners/sdxl.t2i_adapter.depth.zoe\",\n filename=\"model.safetensors\",\n ),\n ),\n scale=0.72,\n).inject()\n\n# load image prompt and image depth condition\nimage_prompt = Image.open(\"german-castle.jpg\")\nimage_depth_condition = Image.open(\"zoe-depth-map-german-castle.png\")\n\nwith no_grad(): # disable gradient calculation for memory-efficient inference\n # encode the text prompts to embeddings, and get the time_ids\n clip_text_embedding, pooled_text_embedding = sdxl.compute_clip_text_embedding(\n text=prompt + \", best quality, high quality\",\n negative_text=\"monochrome, lowres, bad anatomy, worst quality, low quality\",\n )\n time_ids = sdxl.default_time_ids\n\n # compute and set image prompt embeddings\n clip_image_embedding = ip_adapter.compute_clip_image_embedding(ip_adapter.preprocess_image(image_prompt))\n ip_adapter.set_clip_image_embedding(clip_image_embedding)\n\n # compute and set the T2I features\n condition = image_to_tensor(image_depth_condition.convert(\"RGB\"), device=sdxl.device, dtype=sdxl.dtype)\n condition = interpolate(condition, torch.Size((1024, 1024)))\n t2i_features = t2i_adapter.compute_condition_features(condition)\n t2i_adapter.set_condition_features(features=t2i_features)\n\n # seed the random number generator, for reproducibility\n manual_seed(seed)\n\n # SDXL typically generates 1024x1024\n x = sdxl.init_latents((1024, 1024))\n\n # diffusion denoising process\n for step in tqdm(sdxl.steps):\n x = sdxl(\n x,\n step=step,\n clip_text_embedding=clip_text_embedding,\n pooled_text_embedding=pooled_text_embedding,\n time_ids=time_ids,\n )\n predicted_image = sdxl.lda.latents_to_image(x)\n\npredicted_image.save(\"scifi_pixel_IP_T2I_sdxl.png\")\n</code></pre> <p>The results look convincing: the depth and proportions of the initial castle are more faithful, while preserving our futuristic, pixel-art style!</p> Generated image in sci-fi, pixel art style, using IP and T2I Adapters."},{"location":"guides/adapting_sdxl/#wrap-up","title":"Wrap up","text":"<p>As you can see in this guide, composing Adapters on top of foundation models is pretty seamless in Refiners, allowing practitioners to quickly test out different combinations of Adapters for their needs. We encourage you to try out different ones, and even train some yourselves!</p>"},{"location":"guides/training_101/","title":"Training 101","text":"<p>This guide will walk you through training a model using Refiners. We built the <code>training_utils</code> module to provide a simple, flexible, statically type-safe interface.</p> <p>We will use a simple model and a toy dataset for demonstration purposes. The model will be a simple autoencoder, and the dataset will be a synthetic dataset of rectangles of different sizes.</p>"},{"location":"guides/training_101/#pre-requisites","title":"Pre-requisites","text":"<p>We recommend installing Refiners targeting a specific commit hash to avoid unexpected changes in the API. You also get the benefit of having a perfectly reproducible environment.</p> <ul> <li> <p>with rye (recommended): <pre><code>rye add refiners[training] --git=https://github.com/finegrain-ai/refiners.git --branch=<insert-latest-commit-hash>\n</code></pre></p> </li> <li> <p>with pip: <pre><code> pip install \"git+https://github.com/finegrain-ai/refiners.git@<insert-latest-commit-hash>#egg=refiners[training]\"\n</code></pre></p> </li> </ul>"},{"location":"guides/training_101/#model","title":"Model","text":"<p>Let's start by building our autoencoder using Refiners.</p> Expand to see the autoencoder model. <pre><code>from refiners.fluxion import layers as fl\n\n\n class ConvBlock(fl.Chain):\n def __init__(self, in_channels: int, out_channels: int) -> None:\n super().__init__(\n fl.Conv2d(\n in_channels=in_channels,\n out_channels=out_channels,\n kernel_size=3,\n padding=1,\n groups=min(in_channels, out_channels)\n ),\n fl.LayerNorm2d(out_channels),\n fl.SiLU(),\n fl.Conv2d(\n in_channels=out_channels,\n out_channels=out_channels,\n kernel_size=1,\n padding=0,\n ),\n fl.LayerNorm2d(out_channels),\n fl.SiLU(),\n )\n\n\nclass ResidualBlock(fl.Sum):\n def __init__(self, in_channels: int, out_channels: int) -> None:\n super().__init__(\n ConvBlock(in_channels=in_channels, out_channels=out_channels),\n fl.Conv2d(\n in_channels=in_channels,\n out_channels=out_channels,\n kernel_size=3,\n padding=1,\n ),\n )\n\n\nclass Encoder(fl.Chain):\n def __init__(self) -> None:\n super().__init__(\n ResidualBlock(in_channels=1, out_channels=8),\n fl.Downsample(channels=8, scale_factor=2, register_shape=False),\n ResidualBlock(in_channels=8, out_channels=16),\n fl.Downsample(channels=16, scale_factor=2, register_shape=False),\n ResidualBlock(in_channels=16, out_channels=32),\n fl.Downsample(channels=32, scale_factor=2, register_shape=False),\n fl.Reshape(2048),\n fl.Linear(in_features=2048, out_features=256),\n fl.SiLU(),\n fl.Linear(in_features=256, out_features=256),\n )\n\n\nclass Decoder(fl.Chain):\n def __init__(self) -> None:\n super().__init__(\n fl.Linear(in_features=256, out_features=256),\n fl.SiLU(),\n fl.Linear(in_features=256, out_features=2048),\n fl.Reshape(32, 8, 8),\n ResidualBlock(in_channels=32, out_channels=32),\n ResidualBlock(in_channels=32, out_channels=32),\n fl.Upsample(channels=32, upsample_factor=2),\n ResidualBlock(in_channels=32, out_channels=16),\n ResidualBlock(in_channels=16, out_channels=16),\n fl.Upsample(channels=16, upsample_factor=2),\n ResidualBlock(in_channels=16, out_channels=8),\n ResidualBlock(in_channels=8, out_channels=8),\n fl.Upsample(channels=8, upsample_factor=2),\n ResidualBlock(in_channels=8, out_channels=8),\n ResidualBlock(in_channels=8, out_channels=1),\n fl.Sigmoid(),\n )\n\n\nclass Autoencoder(fl.Chain):\n def __init__(self) -> None:\n super().__init__(\n Encoder(),\n Decoder(),\n )\n\n @property\n def encoder(self) -> Encoder:\n return self.ensure_find(Encoder)\n\n @property\n def decoder(self) -> Decoder:\n return self.ensure_find(Decoder)\n</code></pre> <p>We now have a fully functional autoencoder that takes an image with one channel of size 64x64 and compresses it to a vector of size 256 (x16 compression). The decoder then takes this vector and reconstructs the original image.</p> <pre><code>import torch\n\nautoencoder = Autoencoder()\n\nx = torch.randn(2, 1, 64, 64) # batch of 2 images\n\nz = autoencoder.encoder(x) # [2, 256]\n\nx_reconstructed = autoencoder.decoder(z) # [2, 1, 64, 64]\n</code></pre>"},{"location":"guides/training_101/#dataset","title":"Dataset","text":"<p>We will use a synthetic dataset of rectangles of different sizes. The dataset will be generated on the fly using this simple function:</p> <pre><code>import random\nfrom typing import Generator\nfrom PIL import Image\n\nfrom refiners.fluxion.utils import image_to_tensor\n\ndef generate_mask(size: int, seed: int | None = None) -> Generator[torch.Tensor, None, None]:\n \"\"\"Generate a tensor of a binary mask of size `size` using random rectangles.\"\"\"\n if seed is None:\n seed = random.randint(0, 2**32 - 1)\n random.seed(seed)\n\n while True:\n rectangle = Image.new(\n \"L\", (random.randint(1, size), random.randint(1, size)), color=255\n )\n mask = Image.new(\"L\", (size, size))\n mask.paste(\n rectangle,\n (\n random.randint(0, size - rectangle.width),\n random.randint(0, size - rectangle.height),\n ),\n )\n tensor = image_to_tensor(mask)\n\n if random.random() > 0.5:\n tensor = 1 - tensor\n\n yield tensor\n</code></pre> <p>To generate a mask, do:</p> <pre><code>from refiners.fluxion.utils import tensor_to_image\n\nmask = next(generate_mask(64, seed=42))\ntensor_to_image(mask).save(\"mask.png\")\n</code></pre> <p>Here are a two examples of generated masks: </p>"},{"location":"guides/training_101/#trainer","title":"Trainer","text":"<p>We will now create a Trainer class to handle the training loop. This class will manage the model, the optimizer, the loss function, and the dataset. It will also orchestrate the training loop and the evaluation loop.</p> <p>But first, we need to define the batch type that will be used to represent a batch for the forward and backward pass and the configuration associated with the trainer.</p>"},{"location":"guides/training_101/#batch","title":"Batch","text":"<p>Our batches are composed of a single tensor representing the images. We will define a simple <code>Batch</code> type to implement this.</p> <pre><code>from dataclasses import dataclass\n\n@dataclass\nclass Batch:\n image: torch.Tensor\n</code></pre>"},{"location":"guides/training_101/#config","title":"Config","text":"<p>We will now define the configuration for the autoencoder. It holds the configuration for the training loop, the optimizer, and the learning rate scheduler. It should inherit <code>refiners.training_utils.BaseConfig</code> and has the following mandatory attributes:</p> <ul> <li><code>TrainingConfig</code>: The configuration for the training loop, including the duration of the training, the batch size, device, dtype, etc.</li> <li><code>OptimizerConfig</code>: The configuration for the optimizer, including the learning rate, weight decay, etc.</li> <li><code>LRSchedulerConfig</code>: The configuration for the learning rate scheduler, including the scheduler type, parameters, etc.</li> </ul> <p>Example:</p> <pre><code>from refiners.training_utils import BaseConfig, TrainingConfig, OptimizerConfig, LRSchedulerConfig, Optimizers, LRSchedulerType, Epoch\n\nclass AutoencoderConfig(BaseConfig):\n ...\n\ntraining = TrainingConfig(\n duration=Epoch(1000),\n device=\"cuda\" if torch.cuda.is_available() else \"cpu\",\n dtype=\"float32\"\n)\n\noptimizer = OptimizerConfig(\n optimizer=Optimizers.AdamW,\n learning_rate=1e-4,\n)\n\nlr_scheduler = LRSchedulerConfig(\n type=LRSchedulerType.ConstantLR\n)\n\nconfig = AutoencoderConfig(\n training=training,\n optimizer=optimizer,\n lr_scheduler=lr_scheduler,\n)\n</code></pre>"},{"location":"guides/training_101/#subclass","title":"Subclass","text":"<p>We can now define the Trainer subclass. It should inherit from <code>refiners.training_utils.Trainer</code> and implement the following methods:</p> <ul> <li><code>create_data_iterable</code>: The <code>Trainer</code> will call this method to create and cache the data iterable. During training, the loop will pull batches from this iterable and pass them to the <code>compute_loss</code> method. Every time the iterable is exhausted, an epoch ends.</li> <li><code>compute_loss</code>: This method should take a Batch and return the loss tensor.</li> </ul> <p>Here is a simple implementation of the <code>create_data_iterable</code> method. For this toy example, we will generate a simple list of <code>Batch</code> objects containing random masks. Later you can replace this with <code>torch.utils.data.DataLoader</code> or any other data loader with more complex features that support shuffling, parallel loading, etc.</p> <pre><code>from functools import cached_property\nfrom refiners.training_utils import Trainer\n\n\nclass AutoencoderConfig(BaseConfig):\n num_images: int = 2048\n batch_size: int = 32\n\n\nclass AutoencoderTrainer(Trainer[AutoencoderConfig, Batch]):\n def create_data_iterable(self) -> list[Batch]:\n dataset: list[Batch] = []\n generator = generate_mask(size=64)\n\n for _ in range(self.config.num_images // self.config.batch_size):\n masks = [next(generator) for _ in range(self.config.batch_size)]\n dataset.append(Batch(image=torch.cat(masks, dim=0)))\n\n return dataset\n\n def compute_loss(self, batch: Batch) -> torch.Tensor:\n raise NotImplementedError(\"We'll implement this later\")\n\n\ntrainer = AutoencoderTrainer(config)\n</code></pre>"},{"location":"guides/training_101/#model-registration","title":"Model registration","text":"<p>For the Trainer to be able to handle the model, we need to register it. </p> <p>We need two things to do so: </p> <ul> <li>Add <code>refiners.training_utils.ModelConfig</code> attribute to the Config named <code>autoencoder</code>.</li> <li>Add a method to the Trainer subclass that returns the model decorated with <code>@register_model</code> decorator. This method should take the <code>ModelConfig</code> as an argument. The Trainer's <code>__init__</code> will register the models and add any parameters to the optimizer that have <code>requires_grad</code> enabled.</li> </ul> <p>After registering the model, the <code>self.autoencoder</code> attribute will be available in the Trainer.</p> <pre><code>from refiners.training_utils import ModelConfig, register_model\n\n\nclass AutoencoderModelConfig(ModelConfig):\n pass\n\n\nclass AutoencoderConfig(BaseConfig):\n num_images: int = 2048\n batch_size: int = 32\n autoencoder: AutoencoderModelConfig\n\n\nclass AutoencoderTrainer(Trainer[AutoencoderConfig, Batch]):\n # ... other methods\n\n @register_model()\n def autoencoder(self, config: AutoencoderModelConfig) -> Autoencoder:\n return Autoencoder()\n\n def compute_loss(self, batch: Batch) -> torch.Tensor:\n batch.image = batch.image.to(self.device, self.dtype)\n x_reconstructed = self.autoencoder.decoder(\n self.autoencoder.encoder(batch.image)\n )\n return F.binary_cross_entropy(x_reconstructed, batch.image)\n</code></pre> <p>We now have a fully functional Trainer that can train our autoencoder. We can now call the <code>train</code> method to start the training loop.</p> <pre><code>trainer.train()\n</code></pre> <p></p>"},{"location":"guides/training_101/#logging","title":"Logging","text":"<p>Let's write a simple logging callback to log the loss and the reconstructed images during training. A callback is a class that inherits from <code>refiners.training_utils.Callback</code> and implement any of the following methods:</p> <ul> <li><code>on_init_begin</code></li> <li><code>on_init_end</code></li> <li><code>on_train_begin</code></li> <li><code>on_train_end</code></li> <li><code>on_epoch_begin</code></li> <li><code>on_epoch_end</code></li> <li><code>on_step_begin</code></li> <li><code>on_step_end</code></li> <li><code>on_backward_begin</code></li> <li><code>on_backward_end</code></li> <li><code>on_optimizer_step_begin</code></li> <li><code>on_optimizer_step_end</code></li> <li><code>on_compute_loss_begin</code></li> <li><code>on_compute_loss_end</code></li> <li><code>on_evaluate_begin</code></li> <li><code>on_evaluate_end</code></li> <li><code>on_lr_scheduler_step_begin</code></li> <li><code>on_lr_scheduler_step_end</code></li> </ul> <p>We will implement the <code>on_epoch_end</code> method to log the loss and the reconstructed images and the <code>on_compute_loss_end</code> method to store the loss in a list.</p> <pre><code>from refiners.training_utils import Callback\nfrom loguru import logger\nfrom typing import Any\n\n\nclass LoggingCallback(Callback[Any]):\n losses: list[float] = []\n\n def on_compute_loss_end(self, loss: torch.Tensor) -> None:\n self.losses.append(loss.item())\n\n def on_epoch_end(self, epoch: int) -> None:\n mean_loss = sum(self.losses) / len(self.losses)\n logger.info(f\"Mean loss: {mean_loss}, epoch: {epoch}\")\n self.losses = []\n</code></pre> <p>Exactly like models, we need to register the callback to the Trainer. We can do so by adding a <code>CallbackConfig</code> attribute to the config named <code>logging</code> and adding a method to the Trainer class that returns the callback decorated with <code>@register_callback</code> decorator. </p> <pre><code>from refiners.training_utils import CallbackConfig, register_callback\n\nclass AutoencoderConfig(BaseConfig):\n # ... other properties\n logging: CallbackConfig = CallbackConfig()\n\n\nclass AutoencoderTrainer(Trainer[AutoencoderConfig, Batch]):\n # ... other methods\n\n @register_callback()\n def logging(self, config: CallbackConfig) -> LoggingCallback:\n return LoggingCallback()\n</code></pre> <p></p>"},{"location":"guides/training_101/#evaluation","title":"Evaluation","text":"<p>Let's add an evaluation step to the Trainer. We will generate a few masks and their reconstructions and save them to a file. We start by implementing a <code>compute_evaluation</code> method, then we register a callback to call this method at regular intervals.</p> <pre><code>class AutoencoderTrainer(Trainer[AutoencoderConfig, Batch]):\n # ... other methods\n\n def compute_evaluation(self) -> None:\n generator = generate_mask(size=64, seed=0)\n\n grid: list[tuple[Image.Image, Image.Image]] = []\n for _ in range(4):\n mask = next(generator).to(self.device, self.dtype)\n x_reconstructed = self.autoencoder.decoder(\n self.autoencoder.encoder(mask)\n )\n loss = F.mse_loss(x_reconstructed, mask)\n logger.info(f\"Validation loss: {loss.detach().cpu().item()}\")\n grid.append(\n (tensor_to_image(mask), tensor_to_image((x_reconstructed>0.5).float()))\n )\n\n import matplotlib.pyplot as plt\n\n _, axes = plt.subplots(4, 2, figsize=(8, 16))\n\n for i, (mask, reconstructed) in enumerate(grid):\n axes[i, 0].imshow(mask, cmap='gray')\n axes[i, 0].axis('off')\n axes[i, 0].set_title('Mask')\n\n axes[i, 1].imshow(reconstructed, cmap='gray')\n axes[i, 1].axis('off')\n axes[i, 1].set_title('Reconstructed')\n\n plt.tight_layout()\n plt.savefig(f\"result_{trainer.clock.epoch}.png\")\n plt.close()\n</code></pre> <p>We starting by implementing an <code>EvaluationConfig</code> that controls the evaluation interval and the seed for the random generator.</p> <pre><code>from refiners.training_utils.config import TimeValueField\n\nclass EvaluationConfig(CallbackConfig):\n interval: TimeValueField\n seed: int\n</code></pre> <p>The <code>TimeValueField</code> is a custom field that allow Pydantic to parse a string representing a time value (e.g., <code>\"50:epochs\"</code>) into a <code>TimeValue</code> object. This is useful to specify the evaluation interval in the configuration file.</p> <pre><code>from refiners.training_utils import scoped_seed, Callback\n\nclass EvaluationCallback(Callback[Any]):\n def __init__(self, config: EvaluationConfig) -> None:\n self.config = config\n\n def on_epoch_end(self, trainer: Trainer) -> None:\n # The `is_due` method checks if the current epoch is a multiple of the interval.\n if not trainer.clock.is_due(self.config.interval):\n return\n\n # The `scoped_seed` context manager encapsulates the random state for the evaluation and restores it after the \n # evaluation.\n with scoped_seed(self.config.seed):\n trainer.compute_evaluation()\n</code></pre> <p>We can now register the callback to the Trainer.</p> <pre><code>class AutoencoderConfig(BaseConfig):\n # ... other properties\n evaluation: EvaluationConfig\n</code></pre> <pre><code>class AutoencoderTrainer(Trainer[AutoencoderConfig, Batch]):\n # ... other methods\n\n @register_callback()\n def evaluation(self, config: EvaluationConfig) -> EvaluationCallback:\n return EvaluationCallback(config) \n</code></pre> <p>We can now train the model and see the results in the <code>result_{epoch}.png</code> files.</p> <p></p>"},{"location":"guides/training_101/#wrap-up","title":"Wrap up","text":"<p>You can train this toy model using the code below:</p> Expand to see the full code. <pre><code>import random\nfrom dataclasses import dataclass\nfrom typing import Any, Generator\n\nimport torch\nfrom loguru import logger\nfrom PIL import Image\nfrom torch.nn import functional as F\n\nfrom refiners.fluxion import layers as fl\nfrom refiners.fluxion.utils import image_to_tensor, tensor_to_image\nfrom refiners.training_utils import (\n BaseConfig,\n Callback,\n CallbackConfig,\n ClockConfig,\n Epoch,\n LRSchedulerConfig,\n LRSchedulerType,\n ModelConfig,\n OptimizerConfig,\n Optimizers,\n Trainer,\n TrainingConfig,\n register_callback,\n register_model,\n)\nfrom refiners.training_utils.common import scoped_seed\nfrom refiners.training_utils.config import TimeValueField\n\n\nclass ConvBlock(fl.Chain):\n def __init__(self, in_channels: int, out_channels: int) -> None:\n super().__init__(\n fl.Conv2d(\n in_channels=in_channels,\n out_channels=out_channels,\n kernel_size=3,\n padding=1,\n groups=min(in_channels, out_channels),\n ),\n fl.LayerNorm2d(out_channels),\n fl.SiLU(),\n fl.Conv2d(\n in_channels=out_channels,\n out_channels=out_channels,\n kernel_size=1,\n padding=0,\n ),\n fl.LayerNorm2d(out_channels),\n fl.SiLU(),\n )\n\n\nclass ResidualBlock(fl.Sum):\n def __init__(self, in_channels: int, out_channels: int) -> None:\n super().__init__(\n ConvBlock(in_channels=in_channels, out_channels=out_channels),\n fl.Conv2d(\n in_channels=in_channels,\n out_channels=out_channels,\n kernel_size=3,\n padding=1,\n ),\n )\n\n\nclass Encoder(fl.Chain):\n def __init__(self) -> None:\n super().__init__(\n ResidualBlock(in_channels=1, out_channels=8),\n fl.Downsample(channels=8, scale_factor=2, register_shape=False),\n ResidualBlock(in_channels=8, out_channels=16),\n fl.Downsample(channels=16, scale_factor=2, register_shape=False),\n ResidualBlock(in_channels=16, out_channels=32),\n fl.Downsample(channels=32, scale_factor=2, register_shape=False),\n fl.Reshape(2048),\n fl.Linear(in_features=2048, out_features=256),\n fl.SiLU(),\n fl.Linear(in_features=256, out_features=256),\n )\n\n\nclass Decoder(fl.Chain):\n def __init__(self) -> None:\n super().__init__(\n fl.Linear(in_features=256, out_features=256),\n fl.SiLU(),\n fl.Linear(in_features=256, out_features=2048),\n fl.Reshape(32, 8, 8),\n ResidualBlock(in_channels=32, out_channels=32),\n ResidualBlock(in_channels=32, out_channels=32),\n fl.Upsample(channels=32, upsample_factor=2),\n ResidualBlock(in_channels=32, out_channels=16),\n ResidualBlock(in_channels=16, out_channels=16),\n fl.Upsample(channels=16, upsample_factor=2),\n ResidualBlock(in_channels=16, out_channels=8),\n ResidualBlock(in_channels=8, out_channels=8),\n fl.Upsample(channels=8, upsample_factor=2),\n ResidualBlock(in_channels=8, out_channels=8),\n ResidualBlock(in_channels=8, out_channels=1),\n fl.Sigmoid(),\n )\n\n\nclass Autoencoder(fl.Chain):\n def __init__(self) -> None:\n super().__init__(\n Encoder(),\n Decoder(),\n )\n\n @property\n def encoder(self) -> Encoder:\n return self.ensure_find(Encoder)\n\n @property\n def decoder(self) -> Decoder:\n return self.ensure_find(Decoder)\n\n\ndef generate_mask(size: int, seed: int | None = None) -> Generator[torch.Tensor, None, None]:\n \"\"\"Generate a tensor of a binary mask of size `size` using random rectangles.\"\"\"\n if seed is None:\n seed = random.randint(0, 2**32 - 1)\n random.seed(seed)\n\n while True:\n rectangle = Image.new(\"L\", (random.randint(1, size), random.randint(1, size)), color=255)\n mask = Image.new(\"L\", (size, size))\n mask.paste(\n rectangle,\n (\n random.randint(0, size - rectangle.width),\n random.randint(0, size - rectangle.height),\n ),\n )\n tensor = image_to_tensor(mask)\n\n if random.random() > 0.5:\n tensor = 1 - tensor\n\n yield tensor\n\n\n@dataclass\nclass Batch:\n image: torch.Tensor\n\n\nclass AutoencoderModelConfig(ModelConfig):\n pass\n\n\nclass LoggingCallback(Callback[Trainer[Any, Any]]):\n losses: list[float] = []\n\n def on_compute_loss_end(self, trainer: Trainer[Any, Any]) -> None:\n self.losses.append(trainer.loss.detach().cpu().item())\n\n def on_epoch_end(self, trainer: Trainer[Any, Any]) -> None:\n mean_loss = sum(self.losses) / len(self.losses)\n logger.info(f\"Mean loss: {mean_loss}, epoch: {trainer.clock.epoch}\")\n self.losses = []\n\n\nclass EvaluationConfig(CallbackConfig):\n interval: TimeValueField\n seed: int\n\n\nclass EvaluationCallback(Callback[\"AutoencoderTrainer\"]):\n def __init__(self, config: EvaluationConfig) -> None:\n self.config = config\n\n def on_epoch_end(self, trainer: \"AutoencoderTrainer\") -> None:\n # The `is_due` method checks if the current epoch is a multiple of the interval.\n if not trainer.clock.is_due(self.config.interval):\n return\n\n # The `scoped_seed` context manager encapsulates the random state for the evaluation and restores it after the\n # evaluation.\n with scoped_seed(self.config.seed):\n trainer.compute_evaluation()\n\n\nclass AutoencoderConfig(BaseConfig):\n num_images: int = 2048\n batch_size: int = 32\n autoencoder: AutoencoderModelConfig\n evaluation: EvaluationConfig\n logging: CallbackConfig = CallbackConfig()\n\n\nautoencoder_config = AutoencoderModelConfig(\n requires_grad=True, # set during registration to set the requires_grad attribute of the model.\n)\n\ntraining = TrainingConfig(\n duration=Epoch(200),\n device=\"cuda\" if torch.cuda.is_available() else \"cpu\",\n dtype=\"float32\",\n)\n\noptimizer = OptimizerConfig(\n optimizer=Optimizers.AdamW,\n learning_rate=1e-4,\n)\n\nlr_scheduler = LRSchedulerConfig(type=LRSchedulerType.CONSTANT_LR)\n\nconfig = AutoencoderConfig(\n training=training,\n optimizer=optimizer,\n lr_scheduler=lr_scheduler,\n autoencoder=autoencoder_config,\n evaluation=EvaluationConfig(interval=Epoch(50), seed=0),\n clock=ClockConfig(verbose=False), # to disable the default clock logging\n)\n\n\nclass AutoencoderTrainer(Trainer[AutoencoderConfig, Batch]):\n def create_data_iterable(self) -> list[Batch]:\n dataset: list[Batch] = []\n generator = generate_mask(size=64)\n\n for _ in range(self.config.num_images // self.config.batch_size):\n masks = [next(generator).to(self.device, self.dtype) for _ in range(self.config.batch_size)]\n dataset.append(Batch(image=torch.cat(masks, dim=0)))\n\n return dataset\n\n @register_model()\n def autoencoder(self, config: AutoencoderModelConfig) -> Autoencoder:\n return Autoencoder()\n\n def compute_loss(self, batch: Batch) -> torch.Tensor:\n batch.image = batch.image.to(self.device, self.dtype)\n x_reconstructed = self.autoencoder.decoder(self.autoencoder.encoder(batch.image))\n return F.binary_cross_entropy(x_reconstructed, batch.image)\n\n def compute_evaluation(self) -> None:\n generator = generate_mask(size=64, seed=0)\n\n grid: list[tuple[Image.Image, Image.Image]] = []\n validation_losses: list[float] = []\n for _ in range(4):\n mask = next(generator).to(self.device, self.dtype)\n x_reconstructed = self.autoencoder.decoder(self.autoencoder.encoder(mask))\n loss = F.mse_loss(x_reconstructed, mask)\n validation_losses.append(loss.detach().cpu().item())\n grid.append((tensor_to_image(mask), tensor_to_image((x_reconstructed > 0.5).float())))\n\n mean_loss = sum(validation_losses) / len(validation_losses)\n logger.info(f\"Mean validation loss: {mean_loss}, epoch: {self.clock.epoch}\")\n\n import matplotlib.pyplot as plt\n\n _, axes = plt.subplots(4, 2, figsize=(8, 16)) # type: ignore\n\n for i, (mask, reconstructed) in enumerate(grid):\n axes[i, 0].imshow(mask, cmap=\"gray\")\n axes[i, 0].axis(\"off\")\n axes[i, 0].set_title(\"Mask\")\n\n axes[i, 1].imshow(reconstructed, cmap=\"gray\")\n axes[i, 1].axis(\"off\")\n axes[i, 1].set_title(\"Reconstructed\")\n\n plt.tight_layout() # type: ignore\n plt.savefig(f\"result_{trainer.clock.epoch}.png\") # type: ignore\n plt.close() # type: ignore\n\n @register_callback()\n def evaluation(self, config: EvaluationConfig) -> EvaluationCallback:\n return EvaluationCallback(config)\n\n @register_callback()\n def logging(self, config: CallbackConfig) -> LoggingCallback:\n return LoggingCallback()\n\n\ntrainer = AutoencoderTrainer(config)\n\ntrainer.train()\n</code></pre>"},{"location":"home/why/","title":"Why Refiners?","text":""},{"location":"home/why/#pytorch-an-imperative-framework","title":"PyTorch: an imperative framework","text":"<p>PyTorch is a great framework to implement deep learning models, widely adopted in academia and industry around the globe. A core design principle of PyTorch is that users write imperative Python code that manipulates Tensors<sup>1</sup>. This code can be organized in Modules, which are just Python classes whose constructors typically initialize parameters and load weights, and which implement a <code>forward</code> method that computes the forward pass. Dealing with reconstructing an inference graph, backpropagation and so on are left to the framework.</p> <p>This approach works very well in general, as demonstrated by the popularity of PyTorch. However, the growing importance of the Adaptation pattern is challenging it.</p>"},{"location":"home/why/#adaptation-patching-foundation-models","title":"Adaptation: patching foundation models","text":"<p>Adaptation is the idea of patching existing powerful models to implement new capabilities. Those models are called foundation models; they are typically trained from scratch on amounts of data inaccessible to most individuals, small companies or research labs, and exhibit emergent properties. Examples of such models are LLMs (GPT, LLaMa, Mistral), image generation models (Stable Diffusion, Muse), vision models (BLIP-2, LLaVA 1.5, Fuyu-8B) but also models trained on more specific tasks such as embedding extraction (CLIP, DINOv2) or image segmentation (SAM).</p> <p>Adaptation of foundation models can take many forms. One of the simplest but most powerful derives from fine-tuning: re-training a subset of the weights of the model on a specific task, then distributing only those weights. Add to this a trick to significantly reduce the size of the fine-tuned weights and you get LoRA<sup>2</sup>, which is probably the most well-known adaptation method. However, adaptation can go beyond that and change the shape of the model or its inputs.</p>"},{"location":"home/why/#imperative-code-is-hard-to-patch-cleanly","title":"Imperative code is hard to patch cleanly","text":"<p>There are several approaches to patch the code of a foundation model implemented in typical PyTorch imperative style to support adaptation, including:</p> <ul> <li>Just duplicate the original code base and edit it in place unconditionally. This approach is often adopted by researchers today.</li> <li>Change the original code base to optionally support the adapter. This approach is often used by frameworks and libraries built on top of PyTorch and works well for a single adapter. However, as you start adding support for multiple adapters to the same foundation model the cyclomatic complexity explodes and the code becomes hard to maintain and error-prone. The end result is that adapters typically do not compose well.</li> <li>Change the original code to abstract adaptation by adding ad-hoc hooks everywhere. This approach has the advantage of keeping the foundation model independent from its adapter, but it makes the code extremely non-linear and hard to reason about - so-called \"spaghetti code\".</li> </ul> <p>As believers in adaptation, none of those approaches was appealing to us, so we designed Refiners as a better option. Refiners is a micro-framework built on top of PyTorch which does away with its imperative style. In Refiners, models are implemented in a declarative way instead, which makes them by nature easier to manipulate and patch.</p>"},{"location":"home/why/#whats-next","title":"What's next?","text":"<p>Now you know why we wrote a declarative framework, you can check out how. It's not that complicated, we promise!</p> <ol> <li> <p>Paszke et al., 2019. PyTorch: An Imperative Style, High-Performance Deep Learning Library.\u00a0\u21a9</p> </li> <li> <p>Hu et al., 2022. LoRA: Low-Rank Adaptation of Large Language Models.\u00a0\u21a9</p> </li> </ol>"},{"location":"reference/SUMMARY/","title":"SUMMARY","text":"<ul> <li> Fluxion<ul> <li> Adapters</li> <li> Layers</li> <li> Context</li> <li> Utils</li> </ul> </li> <li> Foundation Models<ul> <li> CLIP</li> <li> DINOv2</li> <li> Latent Diffusion</li> <li> Segment Anything</li> <li> Swin Transformers</li> </ul> </li> </ul>"},{"location":"reference/fluxion/adapters/","title":"<code class=\"doc-symbol doc-symbol-nav doc-symbol-module\"></code> Adapters","text":""},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Adapter","title":"Adapter","text":"<p> Bases: <code>Generic[T]</code></p> <p>Base class for adapters.</p> <p>An Adapter modifies the structure of a <code>Module</code> (typically by adding, removing or replacing layers), to adapt it to a new task.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Adapter.target","title":"target <code>property</code>","text":"<pre><code>target: T\n</code></pre> <p>The target of the adapter.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Adapter.eject","title":"eject","text":"<pre><code>eject() -> None\n</code></pre> <p>Eject the adapter.</p> <p>This method is the inverse of <code>inject</code>, and should leave the target in the same state as before the injection.</p> Source code in <code>src/refiners/fluxion/adapters/adapter.py</code> <pre><code>def eject(self) -> None:\n \"\"\"Eject the adapter.\n\n This method is the inverse of [`inject`][refiners.fluxion.adapters.Adapter.inject],\n and should leave the target in the same state as before the injection.\n \"\"\"\n assert isinstance(self, fl.Chain)\n\n # In general, the \"actual target\" is the target.\n # Here we deal with the edge case where the target\n # is part of the replacement block and has been adapted by\n # another adapter after this one. For instance, this is the\n # case when stacking Controlnets.\n actual_target = lookup_top_adapter(self, self.target)\n\n if (parent := self.parent) is None:\n if isinstance(actual_target, fl.ContextModule):\n actual_target._set_parent(None) # type: ignore[reportPrivateUsage]\n else:\n parent.replace(old_module=self, new_module=actual_target)\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Adapter.inject","title":"inject","text":"<pre><code>inject(parent: Chain | None = None) -> TAdapter\n</code></pre> <p>Inject the adapter.</p> <p>This method replaces the target of the adapter by the adapter inside the parent of the target.</p> <p>Parameters:</p> Name Type Description Default <code>parent</code> <code>Chain | None</code> <p>The parent to inject the adapter into, if the target doesn't have a parent.</p> <code>None</code> Source code in <code>src/refiners/fluxion/adapters/adapter.py</code> <pre><code>def inject(self: TAdapter, parent: fl.Chain | None = None) -> TAdapter:\n \"\"\"Inject the adapter.\n\n This method replaces the target of the adapter by the adapter inside the parent of the target.\n\n Args:\n parent: The parent to inject the adapter into, if the target doesn't have a parent.\n \"\"\"\n assert isinstance(self, fl.Chain)\n\n if (parent is None) and isinstance(self.target, fl.ContextModule):\n parent = self.target.parent\n if parent is not None:\n assert isinstance(parent, fl.Chain), f\"{self.target} has invalid parent {parent}\"\n\n target_parent = self.find_parent(self.target)\n\n if parent is None:\n if isinstance(self.target, fl.ContextModule):\n self.target._set_parent(target_parent) # type: ignore[reportPrivateUsage]\n return self\n\n # In general, `true_parent` is `parent`. We do this to support multiple adaptation,\n # i.e. initializing two adapters before injecting them.\n true_parent = parent.ensure_find_parent(self.target)\n true_parent.replace(\n old_module=self.target,\n new_module=self,\n old_module_parent=target_parent,\n )\n return self\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Adapter.setup_adapter","title":"setup_adapter","text":"<pre><code>setup_adapter(target: T) -> Iterator[None]\n</code></pre> <p>Setup the adapter.</p> <p>This method should be called by the constructor of the adapter. It sets the target of the adapter and ensures that the adapter is not a submodule of the target.</p> <p>Parameters:</p> Name Type Description Default <code>target</code> <code>T</code> <p>The target of the adapter.</p> required Source code in <code>src/refiners/fluxion/adapters/adapter.py</code> <pre><code>@contextlib.contextmanager\ndef setup_adapter(self, target: T) -> Iterator[None]:\n \"\"\"Setup the adapter.\n\n This method should be called by the constructor of the adapter.\n It sets the target of the adapter and ensures that the adapter\n is not a submodule of the target.\n\n Args:\n target: The target of the adapter.\n \"\"\"\n assert isinstance(self, fl.Chain)\n assert (not hasattr(self, \"_modules\")) or (\n len(self) == 0\n ), \"Call the Chain constructor in the setup_adapter context.\"\n self._target = [target]\n\n if isinstance(target, fl.ContextModule):\n assert isinstance(target, fl.ContextModule)\n with target.no_parent_refresh():\n yield\n else:\n yield\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Conv2dLora","title":"Conv2dLora","text":"<pre><code>Conv2dLora(\n name: str,\n /,\n in_channels: int,\n out_channels: int,\n rank: int = 16,\n scale: float = 1.0,\n kernel_size: tuple[int, int] = (1, 3),\n stride: tuple[int, int] = (1, 1),\n padding: tuple[int, int] = (0, 1),\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Lora[Conv2d]</code></p> <p>Low-Rank Adaptation (LoRA) layer for 2D convolutional layers.</p> <p>This layer uses two <code>Conv2d</code> layers as its down and up layers.</p> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the LoRA.</p> required <code>in_channels</code> <code>int</code> <p>The number of input channels.</p> required <code>out_channels</code> <code>int</code> <p>The number of output channels.</p> required <code>rank</code> <code>int</code> <p>The rank of the LoRA.</p> <code>16</code> <code>scale</code> <code>float</code> <p>The scale of the LoRA.</p> <code>1.0</code> <code>kernel_size</code> <code>tuple[int, int]</code> <p>The kernel size of the LoRA.</p> <code>(1, 3)</code> <code>stride</code> <code>tuple[int, int]</code> <p>The stride of the LoRA.</p> <code>(1, 1)</code> <code>padding</code> <code>tuple[int, int]</code> <p>The padding of the LoRA.</p> <code>(0, 1)</code> <code>device</code> <code>device | str | None</code> <p>The device of the LoRA weights.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype of the LoRA weights.</p> <code>None</code> Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>def __init__(\n self,\n name: str,\n /,\n in_channels: int,\n out_channels: int,\n rank: int = 16,\n scale: float = 1.0,\n kernel_size: tuple[int, int] = (1, 3),\n stride: tuple[int, int] = (1, 1),\n padding: tuple[int, int] = (0, 1),\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize the LoRA layer.\n\n Args:\n name: The name of the LoRA.\n in_channels: The number of input channels.\n out_channels: The number of output channels.\n rank: The rank of the LoRA.\n scale: The scale of the LoRA.\n kernel_size: The kernel size of the LoRA.\n stride: The stride of the LoRA.\n padding: The padding of the LoRA.\n device: The device of the LoRA weights.\n dtype: The dtype of the LoRA weights.\n \"\"\"\n self.in_channels = in_channels\n self.out_channels = out_channels\n self.kernel_size = kernel_size\n self.stride = stride\n self.padding = padding\n\n super().__init__(\n name,\n rank=rank,\n scale=scale,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.LinearLora","title":"LinearLora","text":"<pre><code>LinearLora(\n name: str,\n /,\n in_features: int,\n out_features: int,\n rank: int = 16,\n scale: float = 1.0,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Lora[Linear]</code></p> <p>Low-Rank Adaptation (LoRA) layer for linear layers.</p> <p>This layer uses two <code>Linear</code> layers as its down and up layers.</p> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the LoRA.</p> required <code>in_features</code> <code>int</code> <p>The number of input features.</p> required <code>out_features</code> <code>int</code> <p>The number of output features.</p> required <code>rank</code> <code>int</code> <p>The rank of the LoRA.</p> <code>16</code> <code>scale</code> <code>float</code> <p>The scale of the LoRA.</p> <code>1.0</code> <code>device</code> <code>device | str | None</code> <p>The device of the LoRA weights.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype of the LoRA weights.</p> <code>None</code> Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>def __init__(\n self,\n name: str,\n /,\n in_features: int,\n out_features: int,\n rank: int = 16,\n scale: float = 1.0,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize the LoRA layer.\n\n Args:\n name: The name of the LoRA.\n in_features: The number of input features.\n out_features: The number of output features.\n rank: The rank of the LoRA.\n scale: The scale of the LoRA.\n device: The device of the LoRA weights.\n dtype: The dtype of the LoRA weights.\n \"\"\"\n self.in_features = in_features\n self.out_features = out_features\n\n super().__init__(\n name,\n rank=rank,\n scale=scale,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Lora","title":"Lora","text":"<pre><code>Lora(\n name: str,\n /,\n rank: int = 16,\n scale: float = 1.0,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Generic[T]</code>, <code>Chain</code>, <code>ABC</code></p> <p>Low-Rank Adaptation (LoRA) layer.</p> <p>This layer's purpose is to approximate a given layer by two smaller layers: the <code>down</code> layer (aka A) and the <code>up</code> layer (aka B). See [ arXiv:2106.09685] LoRA: Low-Rank Adaptation of Large Language Models for more details.</p> Note <p>This layer is not meant to be used directly. Instead, use one of its subclasses:</p> <ul> <li><code>LinearLora</code></li> <li><code>Conv2dLora</code></li> </ul> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the LoRA.</p> required <code>rank</code> <code>int</code> <p>The rank of the LoRA.</p> <code>16</code> <code>scale</code> <code>float</code> <p>The scale of the LoRA.</p> <code>1.0</code> <code>device</code> <code>device | str | None</code> <p>The device of the LoRA weights.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype of the LoRA weights.</p> <code>None</code> Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>def __init__(\n self,\n name: str,\n /,\n rank: int = 16,\n scale: float = 1.0,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize the LoRA layer.\n\n Args:\n name: The name of the LoRA.\n rank: The rank of the LoRA.\n scale: The scale of the LoRA.\n device: The device of the LoRA weights.\n dtype: The dtype of the LoRA weights.\n \"\"\"\n self.name = name\n self._rank = rank\n self._scale = scale\n\n super().__init__(\n *self.lora_layers(device=device, dtype=dtype),\n fl.Multiply(scale),\n )\n self.reset_parameters()\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Lora.down","title":"down <code>property</code>","text":"<pre><code>down: T\n</code></pre> <p>The down layer.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Lora.rank","title":"rank <code>property</code>","text":"<pre><code>rank: int\n</code></pre> <p>The rank of the low-rank approximation.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Lora.scale","title":"scale <code>property</code> <code>writable</code>","text":"<pre><code>scale: float\n</code></pre> <p>The scale of the low-rank approximation.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Lora.up","title":"up <code>property</code>","text":"<pre><code>up: T\n</code></pre> <p>The up layer.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Lora.from_dict","title":"from_dict <code>classmethod</code>","text":"<pre><code>from_dict(\n name: str, /, state_dict: dict[str, Tensor]\n) -> dict[str, Lora[Any]]\n</code></pre> <p>Create a dictionary of LoRA layers from a state dict.</p> <p>Expects the state dict to be a succession of down and up weights.</p> Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>@classmethod\ndef from_dict(cls, name: str, /, state_dict: dict[str, Tensor]) -> dict[str, \"Lora[Any]\"]:\n \"\"\"\n Create a dictionary of LoRA layers from a state dict.\n\n Expects the state dict to be a succession of down and up weights.\n \"\"\"\n state_dict = {k: v for k, v in state_dict.items() if \".weight\" in k}\n loras: dict[str, Lora[Any]] = {}\n for down_key, down_tensor, up_tensor in zip(\n list(state_dict.keys())[::2], list(state_dict.values())[::2], list(state_dict.values())[1::2]\n ):\n key = \".\".join(down_key.split(\".\")[:-2])\n loras[key] = cls.from_weights(name, down=down_tensor, up=up_tensor)\n return loras\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Lora.load_weights","title":"load_weights","text":"<pre><code>load_weights(\n down_weight: Tensor, up_weight: Tensor\n) -> None\n</code></pre> <p>Load the (pre-trained) weights of the LoRA.</p> <p>Parameters:</p> Name Type Description Default <code>down_weight</code> <code>Tensor</code> <p>The down weight.</p> required <code>up_weight</code> <code>Tensor</code> <p>The up weight.</p> required Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>def load_weights(self, down_weight: Tensor, up_weight: Tensor) -> None:\n \"\"\"Load the (pre-trained) weights of the LoRA.\n\n Args:\n down_weight: The down weight.\n up_weight: The up weight.\n \"\"\"\n assert down_weight.shape == self.down.weight.shape\n assert up_weight.shape == self.up.weight.shape\n self.down.weight = TorchParameter(down_weight.to(device=self.device, dtype=self.dtype))\n self.up.weight = TorchParameter(up_weight.to(device=self.device, dtype=self.dtype))\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Lora.lora_layers","title":"lora_layers <code>abstractmethod</code>","text":"<pre><code>lora_layers(\n device: device | str | None = None,\n dtype: dtype | None = None,\n) -> tuple[T, T]\n</code></pre> <p>Create the down and up layers of the LoRA.</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The device of the LoRA weights.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype of the LoRA weights.</p> <code>None</code> Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>@abstractmethod\ndef lora_layers(self, device: Device | str | None = None, dtype: DType | None = None) -> tuple[T, T]:\n \"\"\"Create the down and up layers of the LoRA.\n\n Args:\n device: The device of the LoRA weights.\n dtype: The dtype of the LoRA weights.\n \"\"\"\n ...\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.Lora.reset_parameters","title":"reset_parameters","text":"<pre><code>reset_parameters() -> None\n</code></pre> <p>Reset the parameters of up and down layers.</p> Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>def reset_parameters(self) -> None:\n \"\"\"Reset the parameters of up and down layers.\"\"\"\n normal_(tensor=self.down.weight, std=1 / self.rank)\n zeros_(tensor=self.up.weight)\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.LoraAdapter","title":"LoraAdapter","text":"<pre><code>LoraAdapter(target: WeightedModule, /, *loras: Lora[Any])\n</code></pre> <p> Bases: <code>Sum</code>, <code>Adapter[WeightedModule]</code></p> <p>Adapter for LoRA layers.</p> <p>This adapter simply sums the target layer with the given LoRA layers.</p> <p>Parameters:</p> Name Type Description Default <code>target</code> <code>WeightedModule</code> <p>The target layer.</p> required <code>loras</code> <code>Lora[Any]</code> <p>The LoRA layers.</p> <code>()</code> Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>def __init__(self, target: fl.WeightedModule, /, *loras: Lora[Any]) -> None:\n \"\"\"Initialize the adapter.\n\n Args:\n target: The target layer.\n loras: The LoRA layers.\n \"\"\"\n with self.setup_adapter(target):\n super().__init__(target, *loras)\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.LoraAdapter.lora_layers","title":"lora_layers <code>property</code>","text":"<pre><code>lora_layers: Iterator[Lora[Any]]\n</code></pre> <p>The LoRA layers.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.LoraAdapter.loras","title":"loras <code>property</code>","text":"<pre><code>loras: dict[str, Lora[Any]]\n</code></pre> <p>The LoRA layers indexed by name.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.LoraAdapter.names","title":"names <code>property</code>","text":"<pre><code>names: list[str]\n</code></pre> <p>The names of the LoRA layers.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.LoraAdapter.scales","title":"scales <code>property</code>","text":"<pre><code>scales: dict[str, float]\n</code></pre> <p>The scales of the LoRA layers indexed by names.</p>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.LoraAdapter.add_lora","title":"add_lora","text":"<pre><code>add_lora(lora: Lora[Any]) -> None\n</code></pre> <p>Add a LoRA layer to the adapter.</p> <p>Raises:</p> Type Description <code>AssertionError</code> <p>If the adapter already contains a LoRA layer with the same name.</p> <p>Parameters:</p> Name Type Description Default <code>lora</code> <code>Lora[Any]</code> <p>The LoRA layer to add.</p> required Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>def add_lora(self, lora: Lora[Any], /) -> None:\n \"\"\"Add a LoRA layer to the adapter.\n\n Raises:\n AssertionError: If the adapter already contains a LoRA layer with the same name.\n\n Args:\n lora: The LoRA layer to add.\n \"\"\"\n assert lora.name not in self.names, f\"LoRA layer with name {lora.name} already exists\"\n self.append(lora)\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.LoraAdapter.remove_lora","title":"remove_lora","text":"<pre><code>remove_lora(name: str) -> Lora[Any] | None\n</code></pre> <p>Remove a LoRA layer from the adapter.</p> Note <p>If the adapter doesn't contain a LoRA layer with the given name, nothing happens and <code>None</code> is returned.</p> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the LoRA layer to remove.</p> required Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>def remove_lora(self, name: str, /) -> Lora[Any] | None:\n \"\"\"Remove a LoRA layer from the adapter.\n\n Note:\n If the adapter doesn't contain a LoRA layer with the given name, nothing happens and `None` is returned.\n\n Args:\n name: The name of the LoRA layer to remove.\n \"\"\"\n if name in self.names:\n lora = self.loras[name]\n self.remove(lora)\n return lora\n</code></pre>"},{"location":"reference/fluxion/adapters/#refiners.fluxion.adapters.auto_attach_loras","title":"auto_attach_loras","text":"<pre><code>auto_attach_loras(\n loras: dict[str, Lora[Any]],\n target: Chain,\n /,\n include: list[str] | None = None,\n exclude: list[str] | None = None,\n sanity_check: bool = True,\n debug_map: list[tuple[str, str]] | None = None,\n) -> list[str]\n</code></pre> <p>Auto-attach several LoRA layers to a Chain.</p> <p>Parameters:</p> Name Type Description Default <code>loras</code> <code>dict[str, Lora[Any]]</code> <p>A dictionary of LoRA layers associated to their respective key. The keys are typically derived from the state dict and only used for <code>debug_map</code> and the return value.</p> required <code>target</code> <code>Chain</code> <p>The target Chain.</p> required <code>include</code> <code>list[str] | None</code> <p>A list of layer names, only layers with such a layer in their ancestors will be considered.</p> <code>None</code> <code>exclude</code> <code>list[str] | None</code> <p>A list of layer names, layers with such a layer in their ancestors will not be considered.</p> <code>None</code> <code>sanity_check</code> <code>bool</code> <p>Check that LoRAs passed are correctly attached.</p> <code>True</code> <code>debug_map</code> <code>list[tuple[str, str]] | None</code> <p>Pass a list to get a debug mapping of key - path pairs of attached points.</p> <code>None</code> <p>Returns: A list of keys of LoRA layers which failed to attach.</p> Source code in <code>src/refiners/fluxion/adapters/lora.py</code> <pre><code>def auto_attach_loras(\n loras: dict[str, Lora[Any]],\n target: fl.Chain,\n /,\n include: list[str] | None = None,\n exclude: list[str] | None = None,\n sanity_check: bool = True,\n debug_map: list[tuple[str, str]] | None = None,\n) -> list[str]:\n \"\"\"Auto-attach several LoRA layers to a Chain.\n\n Args:\n loras: A dictionary of LoRA layers associated to their respective key. The keys are typically\n derived from the state dict and only used for `debug_map` and the return value.\n target: The target Chain.\n include: A list of layer names, only layers with such a layer in their ancestors will be considered.\n exclude: A list of layer names, layers with such a layer in their ancestors will not be considered.\n sanity_check: Check that LoRAs passed are correctly attached.\n debug_map: Pass a list to get a debug mapping of key - path pairs of attached points.\n Returns:\n A list of keys of LoRA layers which failed to attach.\n \"\"\"\n\n if not sanity_check:\n return _auto_attach_loras(loras, target, include=include, exclude=exclude, debug_map=debug_map)\n\n loras_copy = {key: Lora.from_weights(lora.name, lora.down.weight, lora.up.weight) for key, lora in loras.items()}\n debug_map_1: list[tuple[str, str]] = []\n failed_keys_1 = _auto_attach_loras(loras, target, include=include, exclude=exclude, debug_map=debug_map_1)\n if debug_map is not None:\n debug_map += debug_map_1\n if len(debug_map_1) != len(loras) or failed_keys_1:\n raise ValueError(\n f\"sanity check failed: {len(debug_map_1)} / {len(loras)} LoRA layers attached, {len(failed_keys_1)} failed\"\n )\n\n # Extra sanity check: if we re-run the attach, all layers should fail.\n debug_map_2: list[tuple[str, str]] = []\n failed_keys_2 = _auto_attach_loras(loras_copy, target, include=include, exclude=exclude, debug_map=debug_map_2)\n if debug_map_2 or len(failed_keys_2) != len(loras):\n raise ValueError(\n f\"sanity check failed: {len(debug_map_2)} / {len(loras)} LoRA layers attached twice, {len(failed_keys_2)} skipped\"\n )\n\n return failed_keys_1\n</code></pre>"},{"location":"reference/fluxion/context/","title":"<code class=\"doc-symbol doc-symbol-nav doc-symbol-module\"></code> Context","text":""},{"location":"reference/fluxion/context/#refiners.fluxion.context.ContextProvider","title":"ContextProvider","text":"<pre><code>ContextProvider()\n</code></pre> <p>A class that provides a context store.</p> Source code in <code>src/refiners/fluxion/context.py</code> <pre><code>def __init__(self) -> None:\n \"\"\"Initializes the ContextProvider.\"\"\"\n self.contexts: Contexts = {}\n</code></pre>"},{"location":"reference/fluxion/context/#refiners.fluxion.context.ContextProvider.create","title":"create <code>staticmethod</code>","text":"<pre><code>create(contexts: Contexts) -> ContextProvider\n</code></pre> <p>Create a ContextProvider from a dict of contexts.</p> <p>Parameters:</p> Name Type Description Default <code>contexts</code> <code>Contexts</code> <p>The contexts.</p> required <p>Returns:</p> Type Description <code>ContextProvider</code> <p>A ContextProvider with the contexts.</p> Source code in <code>src/refiners/fluxion/context.py</code> <pre><code>@staticmethod\ndef create(contexts: Contexts) -> \"ContextProvider\":\n \"\"\"Create a ContextProvider from a dict of contexts.\n\n Args:\n contexts: The contexts.\n\n Returns:\n A ContextProvider with the contexts.\n \"\"\"\n provider = ContextProvider()\n provider.update_contexts(contexts)\n return provider\n</code></pre>"},{"location":"reference/fluxion/context/#refiners.fluxion.context.ContextProvider.get_context","title":"get_context","text":"<pre><code>get_context(key: str) -> Any\n</code></pre> <p>Retrieve a value from the context.</p> <p>Parameters:</p> Name Type Description Default <code>key</code> <code>str</code> <p>The key of the context.</p> required <p>Returns:</p> Type Description <code>Any</code> <p>The context value.</p> Source code in <code>src/refiners/fluxion/context.py</code> <pre><code>def get_context(self, key: str) -> Any:\n \"\"\"Retrieve a value from the context.\n\n Args:\n key: The key of the context.\n\n Returns:\n The context value.\n \"\"\"\n return self.contexts.get(key)\n</code></pre>"},{"location":"reference/fluxion/context/#refiners.fluxion.context.ContextProvider.set_context","title":"set_context","text":"<pre><code>set_context(key: str, value: Context) -> None\n</code></pre> <p>Store a value in the context.</p> <p>Parameters:</p> Name Type Description Default <code>key</code> <code>str</code> <p>The key of the context.</p> required <code>value</code> <code>Context</code> <p>The context.</p> required Source code in <code>src/refiners/fluxion/context.py</code> <pre><code>def set_context(self, key: str, value: Context) -> None:\n \"\"\"Store a value in the context.\n\n Args:\n key: The key of the context.\n value: The context.\n \"\"\"\n self.contexts[key] = value\n</code></pre>"},{"location":"reference/fluxion/context/#refiners.fluxion.context.ContextProvider.update_contexts","title":"update_contexts","text":"<pre><code>update_contexts(new_contexts: Contexts) -> None\n</code></pre> <p>Update or set the contexts with new contexts.</p> <p>Parameters:</p> Name Type Description Default <code>new_contexts</code> <code>Contexts</code> <p>The new contexts.</p> required Source code in <code>src/refiners/fluxion/context.py</code> <pre><code>def update_contexts(self, new_contexts: Contexts) -> None:\n \"\"\"Update or set the contexts with new contexts.\n\n Args:\n new_contexts: The new contexts.\n \"\"\"\n for key, value in new_contexts.items():\n if key not in self.contexts:\n self.contexts[key] = value\n else:\n self.contexts[key].update(value)\n</code></pre>"},{"location":"reference/fluxion/layers/","title":"<code class=\"doc-symbol doc-symbol-nav doc-symbol-module\"></code> Layers","text":""},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Activation","title":"Activation","text":"<pre><code>Activation()\n</code></pre> <p> Bases: <code>Module</code>, <code>ABC</code></p> <p>Base class for activation layers.</p> <p>Activation layers are layers that apply a (non-linear) function to their input.</p> <p>Receives:</p> Name Type Description <code>x</code> <code>Tensor</code> <p>Returns:</p> Type Description <code>Tensor</code> Source code in <code>src/refiners/fluxion/layers/activations.py</code> <pre><code>def __init__(self) -> None:\n super().__init__()\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Attention","title":"Attention","text":"<pre><code>Attention(\n embedding_dim: int,\n num_heads: int = 1,\n key_embedding_dim: int | None = None,\n value_embedding_dim: int | None = None,\n inner_dim: int | None = None,\n use_bias: bool = True,\n is_causal: bool = False,\n is_optimized: bool = True,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Multi-Head Attention layer.</p> See [arXiv:1706.03762] Attention Is All You Need (Figure 2) for more details <p></p> This layer simply chains <ul> <li>a <code>Distribute</code> layer, containing 3 <code>Linear</code> layers, which transforms the 3 inputs into Query, Key and Value</li> <li>a <code>ScaledDotProductAttention</code> layer</li> <li>a <code>Linear</code> layer, which projects the output of the <code>ScaledDotProductAttention</code> layer</li> </ul> <p>Receives:</p> Name Type Description <code>Query</code> <code>Float[Tensor, 'batch sequence_length embedding_dim']</code> <code>Key</code> <code>Float[Tensor, 'batch sequence_length embedding_dim']</code> <code>Value</code> <code>Float[Tensor, 'batch sequence_length embedding_dim']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch sequence_length embedding_dim']</code> Example <pre><code>attention = fl.Attention(num_heads=8, embedding_dim=128)\n\ntensor = torch.randn(2, 10, 128)\noutput = attention(tensor, tensor, tensor)\n\nassert output.shape == (2, 10, 128)\n</code></pre> <p>Parameters:</p> Name Type Description Default <code>embedding_dim</code> <code>int</code> <p>The embedding dimension of the input and output tensors.</p> required <code>num_heads</code> <code>int</code> <p>The number of heads to use.</p> <code>1</code> <code>key_embedding_dim</code> <code>int | None</code> <p>The embedding dimension of the key tensor.</p> <code>None</code> <code>value_embedding_dim</code> <code>int | None</code> <p>The embedding dimension of the value tensor.</p> <code>None</code> <code>inner_dim</code> <code>int | None</code> <p>The inner dimension of the linear layers.</p> <code>None</code> <code>use_bias</code> <code>bool</code> <p>Whether to use bias in the linear layers.</p> <code>True</code> <code>is_causal</code> <code>bool</code> <p>Whether to use causal attention.</p> <code>False</code> <code>is_optimized</code> <code>bool</code> <p>Whether to use optimized attention.</p> <code>True</code> <code>device</code> <code>device | str | None</code> <p>The device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to use.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/attentions.py</code> <pre><code>def __init__(\n self,\n embedding_dim: int,\n num_heads: int = 1,\n key_embedding_dim: int | None = None,\n value_embedding_dim: int | None = None,\n inner_dim: int | None = None,\n use_bias: bool = True,\n is_causal: bool = False,\n is_optimized: bool = True,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize the Attention layer.\n\n Args:\n embedding_dim: The embedding dimension of the input and output tensors.\n num_heads: The number of heads to use.\n key_embedding_dim: The embedding dimension of the key tensor.\n value_embedding_dim: The embedding dimension of the value tensor.\n inner_dim: The inner dimension of the linear layers.\n use_bias: Whether to use bias in the linear layers.\n is_causal: Whether to use causal attention.\n is_optimized: Whether to use optimized attention.\n device: The device to use.\n dtype: The dtype to use.\n \"\"\"\n assert (\n embedding_dim % num_heads == 0\n ), f\"embedding_dim {embedding_dim} must be divisible by num_heads {num_heads}\"\n self.embedding_dim = embedding_dim\n self.num_heads = num_heads\n self.heads_dim = embedding_dim // num_heads\n self.key_embedding_dim = key_embedding_dim or embedding_dim\n self.value_embedding_dim = value_embedding_dim or embedding_dim\n self.inner_dim = inner_dim or embedding_dim\n self.use_bias = use_bias\n self.is_causal = is_causal\n self.is_optimized = is_optimized\n\n super().__init__(\n Distribute(\n Linear( # Query projection\n in_features=self.embedding_dim,\n out_features=self.inner_dim,\n bias=self.use_bias,\n device=device,\n dtype=dtype,\n ),\n Linear( # Key projection\n in_features=self.key_embedding_dim,\n out_features=self.inner_dim,\n bias=self.use_bias,\n device=device,\n dtype=dtype,\n ),\n Linear( # Value projection\n in_features=self.value_embedding_dim,\n out_features=self.inner_dim,\n bias=self.use_bias,\n device=device,\n dtype=dtype,\n ),\n ),\n ScaledDotProductAttention(\n num_heads=num_heads,\n is_causal=is_causal,\n is_optimized=is_optimized,\n ),\n Linear( # Output projection\n in_features=self.inner_dim,\n out_features=self.embedding_dim,\n bias=True,\n device=device,\n dtype=dtype,\n ),\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Breakpoint","title":"Breakpoint","text":"<pre><code>Breakpoint(vscode: bool = True)\n</code></pre> <p> Bases: <code>ContextModule</code></p> <p>Breakpoint layer.</p> <p>This layer pauses the execution when encountered, and opens a debugger.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, vscode: bool = True):\n super().__init__()\n self.vscode = vscode\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain","title":"Chain","text":"<pre><code>Chain(*args: Module | Iterable[Module])\n</code></pre> <p> Bases: <code>ContextModule</code></p> <p>Chain layer.</p> <p>This layer is the main building block of Fluxion. It is used to compose other layers in a sequential manner. Similarly to <code>torch.nn.Sequential</code>, it calls each of its sub-layers in order, chaining their outputs as inputs to the next sublayer. However, it also provides additional methods to manipulate its sub-layers and their context.</p> Example <pre><code>chain = fl.Chain(\n fl.Linear(32, 64),\n fl.ReLU(),\n fl.Linear(64, 128),\n)\n\ntensor = torch.randn(2, 32)\noutput = chain(tensor)\n\nassert output.shape == (2, 128)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, *args: Module | Iterable[Module]) -> None:\n super().__init__()\n self._provider = ContextProvider()\n modules = cast(\n tuple[Module],\n (\n tuple(args[0])\n if len(args) == 1 and isinstance(args[0], Iterable) and not isinstance(args[0], Chain)\n else tuple(args)\n ),\n )\n\n for module in modules:\n # Violating this would mean a ContextModule ends up in two chains,\n # with a single one correctly set as its parent.\n assert (\n (not isinstance(module, ContextModule))\n or (not module._can_refresh_parent)\n or (module.parent is None)\n or (module.parent == self)\n ), f\"{module.__class__.__name__} already has parent {module.parent.__class__.__name__}\"\n\n self._regenerate_keys(modules)\n self._reset_context()\n\n for module in self:\n if isinstance(module, ContextModule) and module.parent != self:\n module._set_parent(self)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.device","title":"device <code>property</code>","text":"<pre><code>device: device | None\n</code></pre> <p>The PyTorch device of the Chain's parameters.</p>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.dtype","title":"dtype <code>property</code>","text":"<pre><code>dtype: dtype | None\n</code></pre> <p>The PyTorch dtype of the Chain's parameters.</p>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.provider","title":"provider <code>property</code>","text":"<pre><code>provider: ContextProvider\n</code></pre> <p>The <code>ContextProvider</code> of the Chain.</p>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.append","title":"append","text":"<pre><code>append(module: Module) -> None\n</code></pre> <p>Append a new module to the chain.</p> <p>Parameters:</p> Name Type Description Default <code>module</code> <code>Module</code> <p>The module to append.</p> required Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def append(self, module: Module) -> None:\n \"\"\"Append a new module to the chain.\n\n Args:\n module: The module to append.\n \"\"\"\n self.insert(-1, module)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.ensure_find","title":"ensure_find","text":"<pre><code>ensure_find(layer_type: type[T]) -> T\n</code></pre> <p>Walk the Chain's sub-module tree and return the first layer of the given type.</p> <p>Parameters:</p> Name Type Description Default <code>layer_type</code> <code>type[T]</code> <p>The type of layer to find.</p> required <p>Returns:</p> Type Description <code>T</code> <p>The first module of the given layer_type.</p> <p>Raises:</p> Type Description <code>AssertionError</code> <p>If the module doesn't exist.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def ensure_find(self, layer_type: type[T]) -> T:\n \"\"\"Walk the Chain's sub-module tree and return the first layer of the given type.\n\n Args:\n layer_type: The type of layer to find.\n\n Returns:\n The first module of the given layer_type.\n\n Raises:\n AssertionError: If the module doesn't exist.\n \"\"\"\n r = self.find(layer_type)\n assert r is not None, f\"could not find {layer_type} in {self}\"\n return r\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.ensure_find_parent","title":"ensure_find_parent","text":"<pre><code>ensure_find_parent(module: Module) -> Chain\n</code></pre> <p>Walk the Chain's sub-module tree and return the parent of the given module.</p> <p>Parameters:</p> Name Type Description Default <code>module</code> <code>Module</code> <p>The module whose parent to find.</p> required <p>Returns:</p> Type Description <code>Chain</code> <p>The parent of the given module.</p> <p>Raises:</p> Type Description <code>AssertionError</code> <p>If the module doesn't exist.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def ensure_find_parent(self, module: Module) -> \"Chain\":\n \"\"\"Walk the Chain's sub-module tree and return the parent of the given module.\n\n Args:\n module: The module whose parent to find.\n\n Returns:\n The parent of the given module.\n\n Raises:\n AssertionError: If the module doesn't exist.\n \"\"\"\n r = self.find_parent(module)\n assert r is not None, f\"could not find {module} in {self}\"\n return r\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.find","title":"find","text":"<pre><code>find(layer_type: type[T]) -> T | None\n</code></pre> <p>Walk the Chain's sub-module tree and return the first layer of the given type.</p> <p>Parameters:</p> Name Type Description Default <code>layer_type</code> <code>type[T]</code> <p>The type of layer to find.</p> required <p>Returns:</p> Type Description <code>T | None</code> <p>The first module of the given layer_type, or None if it doesn't exist.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def find(self, layer_type: type[T]) -> T | None:\n \"\"\"Walk the Chain's sub-module tree and return the first layer of the given type.\n\n Args:\n layer_type: The type of layer to find.\n\n Returns:\n The first module of the given layer_type, or None if it doesn't exist.\n \"\"\"\n return next(self.layers(layer_type=layer_type), None)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.find_parent","title":"find_parent","text":"<pre><code>find_parent(module: Module) -> Chain | None\n</code></pre> <p>Walk the Chain's sub-module tree and return the parent of the given module.</p> <p>Parameters:</p> Name Type Description Default <code>module</code> <code>Module</code> <p>The module whose parent to find.</p> required <p>Returns:</p> Type Description <code>Chain | None</code> <p>The parent of the given module, or None if it doesn't exist.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def find_parent(self, module: Module) -> \"Chain | None\":\n \"\"\"Walk the Chain's sub-module tree and return the parent of the given module.\n\n Args:\n module: The module whose parent to find.\n\n Returns:\n The parent of the given module, or None if it doesn't exist.\n \"\"\"\n if module in self: # avoid DFS-crawling the whole tree\n return self\n for _, parent in self.walk(lambda m, _: m == module):\n return parent\n return None\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.init_context","title":"init_context","text":"<pre><code>init_context() -> Contexts\n</code></pre> <p>Initialize the context provider with some default values.</p> <p>This method is called when the Chain is created, and when it is reset. This method may be overridden by subclasses to provide default values for the context provider.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def init_context(self) -> Contexts:\n \"\"\"Initialize the context provider with some default values.\n\n This method is called when the Chain is created, and when it is reset.\n This method may be overridden by subclasses to provide default values for the context provider.\n \"\"\"\n return {}\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.insert","title":"insert","text":"<pre><code>insert(index: int, module: Module) -> None\n</code></pre> <p>Insert a new module in the chain.</p> <p>Parameters:</p> Name Type Description Default <code>index</code> <code>int</code> <p>The index at which to insert the module.</p> required <code>module</code> <code>Module</code> <p>The module to insert.</p> required <p>Raises:</p> Type Description <code>IndexError</code> <p>If the index is out of range.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def insert(self, index: int, module: Module) -> None:\n \"\"\"Insert a new module in the chain.\n\n Args:\n index: The index at which to insert the module.\n module: The module to insert.\n\n Raises:\n IndexError: If the index is out of range.\n \"\"\"\n if index < 0:\n index = max(0, len(self._modules) + index + 1)\n modules = list(self)\n modules.insert(index, module)\n self._regenerate_keys(modules)\n if isinstance(module, ContextModule):\n module._set_parent(self)\n self._register_provider()\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.insert_after_type","title":"insert_after_type","text":"<pre><code>insert_after_type(\n module_type: type[Module], new_module: Module\n) -> None\n</code></pre> <p>Insert a new module in the chain, right after the first module of the given type.</p> <p>Parameters:</p> Name Type Description Default <code>module_type</code> <code>type[Module]</code> <p>The type of module to insert after.</p> required <code>new_module</code> <code>Module</code> <p>The module to insert.</p> required <p>Raises:</p> Type Description <code>ValueError</code> <p>If no module of the given type exists in the chain.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def insert_after_type(self, module_type: type[Module], new_module: Module) -> None:\n \"\"\"Insert a new module in the chain, right after the first module of the given type.\n\n Args:\n module_type: The type of module to insert after.\n new_module: The module to insert.\n\n Raises:\n ValueError: If no module of the given type exists in the chain.\n \"\"\"\n for i, module in enumerate(self):\n if isinstance(module, module_type):\n self.insert(i + 1, new_module)\n return\n raise ValueError(f\"No module of type {module_type.__name__} found in the chain.\")\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.insert_before_type","title":"insert_before_type","text":"<pre><code>insert_before_type(\n module_type: type[Module], new_module: Module\n) -> None\n</code></pre> <p>Insert a new module in the chain, right before the first module of the given type.</p> <p>Parameters:</p> Name Type Description Default <code>module_type</code> <code>type[Module]</code> <p>The type of module to insert before.</p> required <code>new_module</code> <code>Module</code> <p>The module to insert.</p> required <p>Raises:</p> Type Description <code>ValueError</code> <p>If no module of the given type exists in the chain.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def insert_before_type(self, module_type: type[Module], new_module: Module) -> None:\n \"\"\"Insert a new module in the chain, right before the first module of the given type.\n\n Args:\n module_type: The type of module to insert before.\n new_module: The module to insert.\n\n Raises:\n ValueError: If no module of the given type exists in the chain.\n \"\"\"\n for i, module in enumerate(self):\n if isinstance(module, module_type):\n self.insert(i, new_module)\n return\n raise ValueError(f\"No module of type {module_type.__name__} found in the chain.\")\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.layer","title":"layer","text":"<pre><code>layer(\n key: str | int | Sequence[str | int],\n layer_type: type[T] = Module,\n) -> T\n</code></pre> <p>Access a layer of the Chain given its type.</p> Example <pre><code># same as my_chain[\"Linear_2\"], asserts it is a Linear\nmy_chain.layer(\"Linear_2\", fl.Linear)\n\n\n# same as my_chain[3], asserts it is a Linear\nmy_chain.layer(3, fl.Linear)\n\n# probably won't work\nmy_chain.layer(\"Conv2d\", fl.Linear)\n\n\n# same as my_chain[\"foo\"][42][\"bar\"],\n# assuming bar is a MyType and all parents are Chains\nmy_chain.layer((\"foo\", 42, \"bar\"), fl.MyType)\n</code></pre> <p>Parameters:</p> Name Type Description Default <code>key</code> <code>str | int | Sequence[str | int]</code> <p>The key or path of the layer.</p> required <code>layer_type</code> <code>type[T]</code> <p>The type of the layer.</p> <code>Module</code> <p>Yields:</p> Type Description <code>T</code> <p>The layer.</p> <p>Raises:</p> Type Description <code>AssertionError</code> <p>If the layer doesn't exist or the type is invalid.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def layer(self, key: str | int | Sequence[str | int], layer_type: type[T] = Module) -> T:\n \"\"\"Access a layer of the Chain given its type.\n\n Example:\n ```py\n # same as my_chain[\"Linear_2\"], asserts it is a Linear\n my_chain.layer(\"Linear_2\", fl.Linear)\n\n\n # same as my_chain[3], asserts it is a Linear\n my_chain.layer(3, fl.Linear)\n\n # probably won't work\n my_chain.layer(\"Conv2d\", fl.Linear)\n\n\n # same as my_chain[\"foo\"][42][\"bar\"],\n # assuming bar is a MyType and all parents are Chains\n my_chain.layer((\"foo\", 42, \"bar\"), fl.MyType)\n ```\n\n Args:\n key: The key or path of the layer.\n layer_type: The type of the layer.\n\n Yields:\n The layer.\n\n Raises:\n AssertionError: If the layer doesn't exist or the type is invalid.\n \"\"\"\n if isinstance(key, (str, int)):\n r = self[key]\n assert isinstance(r, layer_type), f\"layer {key} is {type(r)}, not {layer_type}\"\n return r\n if len(key) == 0:\n assert isinstance(self, layer_type), f\"layer is {type(self)}, not {layer_type}\"\n return self\n if len(key) == 1:\n return self.layer(key[0], layer_type)\n return self.layer(key[0], Chain).layer(key[1:], layer_type)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.layers","title":"layers","text":"<pre><code>layers(\n layer_type: type[T], recurse: bool = False\n) -> Iterator[T]\n</code></pre> <p>Walk the Chain's sub-module tree and yield each layer of the given type.</p> <p>Parameters:</p> Name Type Description Default <code>layer_type</code> <code>type[T]</code> <p>The type of layer to yield.</p> required <code>recurse</code> <code>bool</code> <p>Whether to recurse into sub-Chains.</p> <code>False</code> <p>Yields:</p> Type Description <code>T</code> <p>Each module of the given layer_type.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def layers(\n self,\n layer_type: type[T],\n recurse: bool = False,\n) -> Iterator[T]:\n \"\"\"Walk the Chain's sub-module tree and yield each layer of the given type.\n\n Args:\n layer_type: The type of layer to yield.\n recurse: Whether to recurse into sub-Chains.\n\n Yields:\n Each module of the given layer_type.\n \"\"\"\n for module, _ in self.walk(layer_type, recurse):\n yield module\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.pop","title":"pop","text":"<pre><code>pop(index: int = -1) -> Module\n</code></pre> <p>Pop a module from the chain at the given index.</p> <p>Parameters:</p> Name Type Description Default <code>index</code> <code>int</code> <p>The index of the module to pop.</p> <code>-1</code> <p>Returns:</p> Type Description <code>Module</code> <p>The popped module.</p> <p>Raises:</p> Type Description <code>IndexError</code> <p>If the index is out of range.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def pop(self, index: int = -1) -> Module:\n \"\"\"Pop a module from the chain at the given index.\n\n Args:\n index: The index of the module to pop.\n\n Returns:\n The popped module.\n\n Raises:\n IndexError: If the index is out of range.\n \"\"\"\n modules = list(self)\n if index < 0:\n index = len(modules) + index\n if index < 0 or index >= len(modules):\n raise IndexError(\"Index out of range.\")\n removed_module = modules.pop(index)\n if isinstance(removed_module, ContextModule):\n removed_module._set_parent(None)\n self._regenerate_keys(modules)\n return removed_module\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.remove","title":"remove","text":"<pre><code>remove(module: Module) -> None\n</code></pre> <p>Remove a module from the chain.</p> <p>Parameters:</p> Name Type Description Default <code>module</code> <code>Module</code> <p>The module to remove.</p> required <p>Raises:</p> Type Description <code>ValueError</code> <p>If the module is not in the chain.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def remove(self, module: Module) -> None:\n \"\"\"Remove a module from the chain.\n\n Args:\n module: The module to remove.\n\n Raises:\n ValueError: If the module is not in the chain.\n \"\"\"\n modules = list(self)\n try:\n modules.remove(module)\n except ValueError:\n raise ValueError(f\"{module} is not in {self}\")\n self._regenerate_keys(modules)\n if isinstance(module, ContextModule):\n module._set_parent(None)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.replace","title":"replace","text":"<pre><code>replace(\n old_module: Module,\n new_module: Module,\n old_module_parent: Chain | None = None,\n) -> None\n</code></pre> <p>Replace a module in the chain with a new module.</p> <p>Parameters:</p> Name Type Description Default <code>old_module</code> <code>Module</code> <p>The module to replace.</p> required <code>new_module</code> <code>Module</code> <p>The module to replace with.</p> required <code>old_module_parent</code> <code>Chain | None</code> <p>The parent of the old module. If None, the old module is orphanized.</p> <code>None</code> <p>Raises:</p> Type Description <code>ValueError</code> <p>If the module is not in the chain.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def replace(\n self,\n old_module: Module,\n new_module: Module,\n old_module_parent: \"Chain | None\" = None,\n) -> None:\n \"\"\"Replace a module in the chain with a new module.\n\n Args:\n old_module: The module to replace.\n new_module: The module to replace with.\n old_module_parent: The parent of the old module.\n If None, the old module is orphanized.\n\n Raises:\n ValueError: If the module is not in the chain.\n \"\"\"\n modules = list(self)\n try:\n modules[modules.index(old_module)] = new_module\n except ValueError:\n raise ValueError(f\"{old_module} is not in {self}\")\n self._regenerate_keys(modules)\n if isinstance(new_module, ContextModule):\n new_module._set_parent(self)\n if isinstance(old_module, ContextModule):\n old_module._set_parent(old_module_parent)\n self._register_provider()\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.set_context","title":"set_context","text":"<pre><code>set_context(context: str, value: Any) -> None\n</code></pre> <p>Set a value in the context provider.</p> <p>Parameters:</p> Name Type Description Default <code>context</code> <code>str</code> <p>The context to update.</p> required <code>value</code> <code>Any</code> <p>The value to set.</p> required Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def set_context(self, context: str, value: Any) -> None:\n \"\"\"Set a value in the context provider.\n\n Args:\n context: The context to update.\n value: The value to set.\n \"\"\"\n self._provider.set_context(context, value)\n self._register_provider()\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.structural_copy","title":"structural_copy","text":"<pre><code>structural_copy() -> TChain\n</code></pre> <p>Copy the structure of the Chain tree.</p> <p>This method returns a recursive copy of the Chain tree where all inner nodes (instances of Chain and its subclasses) are duplicated and all leaves (regular Modules) are not.</p> <p>Such copies can be adapted without disrupting the base model, but do not require extra GPU memory since the weights are in the leaves and hence not copied.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def structural_copy(self: TChain) -> TChain:\n \"\"\"Copy the structure of the Chain tree.\n\n This method returns a recursive copy of the Chain tree where all inner nodes\n (instances of Chain and its subclasses) are duplicated and all leaves\n (regular Modules) are not.\n\n Such copies can be adapted without disrupting the base model, but do not\n require extra GPU memory since the weights are in the leaves and hence not copied.\n \"\"\"\n if hasattr(self, \"_pre_structural_copy\"):\n assert callable(self._pre_structural_copy)\n self._pre_structural_copy()\n\n modules = [structural_copy(m) for m in self]\n clone = super().structural_copy()\n clone._provider = ContextProvider.create(clone.init_context())\n\n for module in modules:\n clone.append(module=module)\n\n if hasattr(clone, \"_post_structural_copy\"):\n assert callable(clone._post_structural_copy)\n clone._post_structural_copy(self)\n\n return clone\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Chain.walk","title":"walk","text":"<pre><code>walk(\n predicate: (\n Callable[[Module, Chain], bool] | None\n ) = None,\n recurse: bool = False,\n) -> Iterator[tuple[Module, Chain]]\n</code></pre><pre><code>walk(\n predicate: type[T], recurse: bool = False\n) -> Iterator[tuple[T, Chain]]\n</code></pre> <pre><code>walk(\n predicate: (\n type[T] | Callable[[Module, Chain], bool] | None\n ) = None,\n recurse: bool = False,\n) -> (\n Iterator[tuple[T, Chain]]\n | Iterator[tuple[Module, Chain]]\n)\n</code></pre> <p>Walk the Chain's sub-module tree and yield each module that matches the predicate.</p> <p>Parameters:</p> Name Type Description Default <code>predicate</code> <code>type[T] | Callable[[Module, Chain], bool] | None</code> <p>The predicate to match.</p> <code>None</code> <code>recurse</code> <code>bool</code> <p>Whether to recurse into sub-Chains.</p> <code>False</code> <p>Yields:</p> Type Description <code>Iterator[tuple[T, Chain]] | Iterator[tuple[Module, Chain]]</code> <p>Each module that matches the predicate.</p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def walk(\n self,\n predicate: type[T] | Callable[[Module, \"Chain\"], bool] | None = None,\n recurse: bool = False,\n) -> Iterator[tuple[T, \"Chain\"]] | Iterator[tuple[Module, \"Chain\"]]:\n \"\"\"Walk the Chain's sub-module tree and yield each module that matches the predicate.\n\n Args:\n predicate: The predicate to match.\n recurse: Whether to recurse into sub-Chains.\n\n Yields:\n Each module that matches the predicate.\n \"\"\"\n\n if get_origin(predicate) is not None:\n raise ValueError(f\"subscripted generics cannot be used as predicates\")\n\n if isinstance(predicate, type):\n # if the predicate is a Module type\n # build a predicate function that matches the type\n return self._walk(\n predicate=lambda m, _: isinstance(m, predicate),\n recurse=recurse,\n )\n else:\n return self._walk(\n predicate=predicate,\n recurse=recurse,\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Concatenate","title":"Concatenate","text":"<pre><code>Concatenate(*modules: Module, dim: int = 0)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Concatenation layer.</p> <p>This layer calls its sub-modules in parallel with the same inputs, and returns the concatenation of their outputs.</p> Example <pre><code>concatenate = fl.Concatenate(\n fl.Linear(32, 128),\n fl.Linear(32, 128),\n dim=1,\n)\n\ntensor = torch.randn(2, 32)\noutput = concatenate(tensor)\n\nassert output.shape == (2, 256)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, *modules: Module, dim: int = 0) -> None:\n super().__init__(*modules)\n self.dim = dim\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ContextModule","title":"ContextModule","text":"<pre><code>ContextModule(*args: Any, **kwargs: Any)\n</code></pre> <p> Bases: <code>Module</code></p> <p>A module containing a <code>ContextProvider</code>.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def __init__(self, *args: Any, **kwargs: Any) -> None:\n super().__init__(*args, *kwargs)\n self._parent = []\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ContextModule.ensure_parent","title":"ensure_parent <code>property</code>","text":"<pre><code>ensure_parent: Chain\n</code></pre> <p>Return the module's parent, or raise an error if module is an orphan.</p>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ContextModule.parent","title":"parent <code>property</code>","text":"<pre><code>parent: Chain | None\n</code></pre> <p>Return the module's parent, or None if module is an orphan.</p>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ContextModule.provider","title":"provider <code>property</code>","text":"<pre><code>provider: ContextProvider\n</code></pre> <p>Return the module's context provider.</p>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ContextModule.get_parents","title":"get_parents","text":"<pre><code>get_parents() -> list[Chain]\n</code></pre> <p>Recursively retrieve the module's parents.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def get_parents(self) -> \"list[Chain]\":\n \"\"\"Recursively retrieve the module's parents.\"\"\"\n return self._parent + self._parent[0].get_parents() if self._parent else []\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ContextModule.get_path","title":"get_path","text":"<pre><code>get_path(\n parent: Chain | None = None, top: Module | None = None\n) -> str\n</code></pre> <p>Get the path of the module in the chain.</p> <p>Parameters:</p> Name Type Description Default <code>parent</code> <code>Chain | None</code> <p>The parent of the module in the chain.</p> <code>None</code> <code>top</code> <code>Module | None</code> <p>The top module of the chain. If None, the path will be relative to the root of the chain.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def get_path(self, parent: \"Chain | None\" = None, top: \"Module | None\" = None) -> str:\n \"\"\"Get the path of the module in the chain.\n\n Args:\n parent: The parent of the module in the chain.\n top: The top module of the chain.\n If None, the path will be relative to the root of the chain.\n \"\"\"\n\n return super().get_path(parent=parent or self.parent, top=top)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ContextModule.use_context","title":"use_context","text":"<pre><code>use_context(context_name: str) -> Context\n</code></pre> <p>Retrieve the context object from the module's context provider.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def use_context(self, context_name: str) -> Context:\n \"\"\"Retrieve the context object from the module's context provider.\"\"\"\n context = self.provider.get_context(context_name)\n assert context is not None, f\"Context {context_name} not found.\"\n return context\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Conv2d","title":"Conv2d","text":"<pre><code>Conv2d(\n in_channels: int,\n out_channels: int,\n kernel_size: int | tuple[int, int],\n stride: int | tuple[int, int] = (1, 1),\n padding: int | tuple[int, int] | str = (0, 0),\n groups: int = 1,\n use_bias: bool = True,\n dilation: int | tuple[int, int] = (1, 1),\n padding_mode: str = \"zeros\",\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Conv2d</code>, <code>WeightedModule</code></p> <p>2D Convolutional layer.</p> <p>This layer wraps <code>torch.nn.Conv2d</code>.</p> <p>Receives:</p> Type Description <code>Real[Tensor, 'batch in_channels in_height in_width']</code> <p>Returns:</p> Type Description <code>Real[Tensor, 'batch out_channels out_height out_width']</code> Example <pre><code>conv2d = fl.Conv2d(\n in_channels=3,\n out_channels=32,\n kernel_size=3,\n stride=1,\n padding=1,\n)\n\ntensor = torch.randn(2, 3, 128, 128)\noutput = conv2d(tensor)\n\nassert output.shape == (2, 32, 128, 128)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/conv.py</code> <pre><code>def __init__(\n self,\n in_channels: int,\n out_channels: int,\n kernel_size: int | tuple[int, int],\n stride: int | tuple[int, int] = (1, 1),\n padding: int | tuple[int, int] | str = (0, 0),\n groups: int = 1,\n use_bias: bool = True,\n dilation: int | tuple[int, int] = (1, 1),\n padding_mode: str = \"zeros\",\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n super().__init__( # type: ignore\n in_channels=in_channels,\n out_channels=out_channels,\n kernel_size=kernel_size,\n stride=stride,\n padding=padding,\n dilation=dilation,\n groups=groups,\n bias=use_bias,\n padding_mode=padding_mode,\n device=device,\n dtype=dtype,\n )\n self.use_bias = use_bias\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ConvTranspose2d","title":"ConvTranspose2d","text":"<pre><code>ConvTranspose2d(\n in_channels: int,\n out_channels: int,\n kernel_size: int | tuple[int, int],\n stride: int | tuple[int, int] = 1,\n padding: int | tuple[int, int] = 0,\n output_padding: int | tuple[int, int] = 0,\n groups: int = 1,\n use_bias: bool = True,\n dilation: int | tuple[int, int] = 1,\n padding_mode: str = \"zeros\",\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>ConvTranspose2d</code>, <code>WeightedModule</code></p> <p>2D Transposed Convolutional layer.</p> <p>This layer wraps <code>torch.nn.ConvTranspose2d</code>.</p> <p>Receives:</p> Type Description <code>Real[Tensor, 'batch in_channels in_height in_width']</code> <p>Returns:</p> Type Description <code>Real[Tensor, 'batch out_channels out_height out_width']</code> Example <pre><code>conv2d = fl.ConvTranspose2d(\n in_channels=3,\n out_channels=32,\n kernel_size=3,\n stride=1,\n padding=1,\n)\n\ntensor = torch.randn(2, 3, 128, 128)\noutput = conv2d(tensor)\n\nassert output.shape == (2, 32, 128, 128)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/conv.py</code> <pre><code>def __init__(\n self,\n in_channels: int,\n out_channels: int,\n kernel_size: int | tuple[int, int],\n stride: int | tuple[int, int] = 1,\n padding: int | tuple[int, int] = 0,\n output_padding: int | tuple[int, int] = 0,\n groups: int = 1,\n use_bias: bool = True,\n dilation: int | tuple[int, int] = 1,\n padding_mode: str = \"zeros\",\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n super().__init__( # type: ignore\n in_channels=in_channels,\n out_channels=out_channels,\n kernel_size=kernel_size,\n stride=stride,\n padding=padding,\n output_padding=output_padding,\n dilation=dilation,\n groups=groups,\n bias=use_bias,\n padding_mode=padding_mode,\n device=device,\n dtype=dtype,\n )\n self.use_bias = use_bias\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Converter","title":"Converter","text":"<pre><code>Converter(set_device: bool = True, set_dtype: bool = True)\n</code></pre> <p> Bases: <code>ContextModule</code></p> <p>A Converter class that adjusts tensor properties based on a parent module's settings.</p> <p>This class inherits from <code>ContextModule</code> and provides functionality to adjust the device and dtype of input tensor(s) to match the parent module's attributes.</p> Note <p>Ensure the parent module has <code>device</code> and <code>dtype</code> attributes if <code>set_device</code> or <code>set_dtype</code> are set to True.</p> <p>Parameters:</p> Name Type Description Default <code>set_device</code> <code>bool</code> <p>If True, matches the device of the input tensor(s) to the parent's device.</p> <code>True</code> <code>set_dtype</code> <code>bool</code> <p>If True, matches the dtype of the input tensor(s) to the parent's dtype.</p> <code>True</code> Source code in <code>src/refiners/fluxion/layers/converter.py</code> <pre><code>def __init__(self, set_device: bool = True, set_dtype: bool = True) -> None:\n \"\"\"Initializes the Converter layer.\n\n Args:\n set_device: If True, matches the device of the input tensor(s) to the parent's device.\n set_dtype: If True, matches the dtype of the input tensor(s) to the parent's dtype.\n \"\"\"\n super().__init__()\n self.set_device = set_device\n self.set_dtype = set_dtype\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Cos","title":"Cos","text":"<pre><code>Cos(*args: Any, **kwargs: Any)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Cosine operator layer.</p> <p>This layer applies the cosine function to the input tensor. See also <code>torch.cos</code>.</p> Example <pre><code>cos = fl.Cos()\n\ntensor = torch.tensor([0, torch.pi])\noutput = cos(tensor)\n\nexpected_output = torch.tensor([1.0, -1.0])\nassert torch.allclose(output, expected_output, atol=1e-6)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def __init__(self, *args: Any, **kwargs: Any) -> None:\n super().__init__(*args, *kwargs) # type: ignore[reportUnknownMemberType]\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Distribute","title":"Distribute","text":"<pre><code>Distribute(*args: Module | Iterable[Module])\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Distribute layer.</p> <p>This layer calls its sub-modules in parallel with their respective input, and returns a tuple of their outputs.</p> Example <pre><code>distribute = fl.Distribute(\n fl.Linear(32, 128),\n fl.Linear(64, 256),\n)\n\ntensor1 = torch.randn(2, 32)\ntensor2 = torch.randn(4, 64)\noutputs = distribute(tensor1, tensor2)\n\nassert len(outputs) == 2\nassert outputs[0].shape == (2, 128)\nassert outputs[1].shape == (4, 256)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, *args: Module | Iterable[Module]) -> None:\n super().__init__()\n self._provider = ContextProvider()\n modules = cast(\n tuple[Module],\n (\n tuple(args[0])\n if len(args) == 1 and isinstance(args[0], Iterable) and not isinstance(args[0], Chain)\n else tuple(args)\n ),\n )\n\n for module in modules:\n # Violating this would mean a ContextModule ends up in two chains,\n # with a single one correctly set as its parent.\n assert (\n (not isinstance(module, ContextModule))\n or (not module._can_refresh_parent)\n or (module.parent is None)\n or (module.parent == self)\n ), f\"{module.__class__.__name__} already has parent {module.parent.__class__.__name__}\"\n\n self._regenerate_keys(modules)\n self._reset_context()\n\n for module in self:\n if isinstance(module, ContextModule) and module.parent != self:\n module._set_parent(self)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Downsample","title":"Downsample","text":"<pre><code>Downsample(\n channels: int,\n scale_factor: int,\n padding: int = 0,\n register_shape: bool = True,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Downsample layer.</p> <p>This layer downsamples the input by the given scale factor.</p> <p>Raises:</p> Type Description <code>RuntimeError</code> <p>If the context sampling is not set or if the context does not contain a list.</p> <p>Parameters:</p> Name Type Description Default <code>channels</code> <code>int</code> <p>The number of input and output channels.</p> required <code>scale_factor</code> <code>int</code> <p>The factor by which to downsample the input.</p> required <code>padding</code> <code>int</code> <p>The amount of zero-padding added to both sides of the input.</p> <code>0</code> <code>register_shape</code> <code>bool</code> <p>If True, registers the input shape in the context.</p> <code>True</code> <code>device</code> <code>device | str | None</code> <p>The device to use for the convolutional layer.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to use for the convolutional layer.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/sampling.py</code> <pre><code>def __init__(\n self,\n channels: int,\n scale_factor: int,\n padding: int = 0,\n register_shape: bool = True,\n device: Device | str | None = None,\n dtype: DType | None = None,\n):\n \"\"\"Initializes the Downsample layer.\n\n Args:\n channels: The number of input and output channels.\n scale_factor: The factor by which to downsample the input.\n padding: The amount of zero-padding added to both sides of the input.\n register_shape: If True, registers the input shape in the context.\n device: The device to use for the convolutional layer.\n dtype: The dtype to use for the convolutional layer.\n \"\"\"\n self.channels = channels\n self.in_channels = channels\n self.out_channels = channels\n self.scale_factor = scale_factor\n self.padding = padding\n\n super().__init__(\n Conv2d(\n in_channels=channels,\n out_channels=channels,\n kernel_size=3,\n stride=scale_factor,\n padding=padding,\n device=device,\n dtype=dtype,\n ),\n )\n\n if padding == 0:\n zero_pad: Callable[[Tensor], Tensor] = lambda x: pad(x, (0, 1, 0, 1))\n self.insert(\n index=0,\n module=Lambda(func=zero_pad),\n )\n\n if register_shape:\n self.insert(\n index=0,\n module=SetContext(\n context=\"sampling\",\n key=\"shapes\",\n callback=self.register_shape,\n ),\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Embedding","title":"Embedding","text":"<pre><code>Embedding(\n num_embeddings: int,\n embedding_dim: int,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Embedding</code>, <code>WeightedModule</code></p> <p>Embedding layer.</p> <p>This layer wraps <code>torch.nn.Embedding</code>.</p> <p>Receives:</p> Type Description <code>Int[Tensor, 'batch length']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch length embedding_dim']</code> Example <pre><code>embedding = fl.Embedding(\n num_embeddings=10,\n embedding_dim=128\n)\n\ntensor = torch.randint(0, 10, (2, 10))\noutput = embedding(tensor)\n\nassert output.shape == (2, 10, 128)\n</code></pre> <p>Parameters:</p> Name Type Description Default <code>num_embeddings</code> <code>int</code> <p>The number of embeddings.</p> required <code>embedding_dim</code> <code>int</code> <p>The dimension of the embeddings.</p> required <code>device</code> <code>device | str | None</code> <p>The device to use for the embedding layer.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to use for the embedding layer.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/embedding.py</code> <pre><code>def __init__(\n self,\n num_embeddings: int,\n embedding_dim: int,\n device: Device | str | None = None,\n dtype: DType | None = None,\n):\n \"\"\"Initializes the Embedding layer.\n\n Args:\n num_embeddings: The number of embeddings.\n embedding_dim: The dimension of the embeddings.\n device: The device to use for the embedding layer.\n dtype: The dtype to use for the embedding layer.\n \"\"\"\n _Embedding.__init__( # type: ignore\n self,\n num_embeddings=num_embeddings,\n embedding_dim=embedding_dim,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Flatten","title":"Flatten","text":"<pre><code>Flatten(start_dim: int = 0, end_dim: int = -1)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Flatten operation layer.</p> <p>This layer flattens the input tensor between the given dimensions. See also <code>torch.flatten</code>.</p> Example <pre><code>flatten = fl.Flatten(start_dim=1)\n\ntensor = torch.randn(10, 10, 10)\noutput = flatten(tensor)\n\nassert output.shape == (10, 100)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(\n self,\n start_dim: int = 0,\n end_dim: int = -1,\n) -> None:\n super().__init__()\n self.start_dim = start_dim\n self.end_dim = end_dim\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.GLU","title":"GLU","text":"<pre><code>GLU(activation: Activation)\n</code></pre> <p> Bases: <code>Activation</code></p> <p>Gated Linear Unit activation function.</p> <p>See [arXiv:2002.05202] GLU Variants Improve Transformer for more details.</p> Example <pre><code>glu = fl.GLU(fl.ReLU())\ntensor = torch.tensor([[1.0, 0.0, -1.0, 1.0]])\noutput = glu(tensor)\nassert torch.allclose(output, torch.tensor([0.0, 0.0]))\n</code></pre> Source code in <code>src/refiners/fluxion/layers/activations.py</code> <pre><code>def __init__(self, activation: Activation) -> None:\n super().__init__()\n self.activation = activation\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.GeLU","title":"GeLU","text":"<pre><code>GeLU(approximation: GeLUApproximation = NONE)\n</code></pre> <p> Bases: <code>Activation</code></p> <p>Gaussian Error Linear Unit activation function.</p> <p>This activation can be quite expensive to compute, a few approximations are available, see <code>GeLUApproximation</code>.</p> <p>See [arXiv:1606.08415] Gaussian Error Linear Units for more details.</p> Example <pre><code>gelu = fl.GeLU()\n\ntensor = torch.tensor([[-1.0, 0.0, 1.0]])\noutput = gelu(tensor)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/activations.py</code> <pre><code>def __init__(\n self,\n approximation: GeLUApproximation = GeLUApproximation.NONE,\n) -> None:\n super().__init__()\n self.approximation = approximation\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.GeLUApproximation","title":"GeLUApproximation","text":"<p> Bases: <code>Enum</code></p> <p>Approximation methods for the Gaussian Error Linear Unit activation function.</p> <p>Attributes:</p> Name Type Description <code>NONE</code> <p>No approximation, use the original formula.</p> <code>TANH</code> <p>Use the tanh approximation.</p> <code>SIGMOID</code> <p>Use the sigmoid approximation.</p>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.GetArg","title":"GetArg","text":"<pre><code>GetArg(index: int)\n</code></pre> <p> Bases: <code>Module</code></p> <p>GetArg operation layer.</p> <p>This layer returns the nth tensor of the input arguments.</p> Example <pre><code>get_arg = fl.GetArg(1)\n\ninputs = (\n torch.randn(10, 10),\n torch.randn(20, 20),\n torch.randn(30, 30),\n)\noutput = get_arg(*inputs)\n\nassert id(inputs[1]) == id(output)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(self, index: int) -> None:\n super().__init__()\n self.index = index\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.GroupNorm","title":"GroupNorm","text":"<pre><code>GroupNorm(\n channels: int,\n num_groups: int,\n eps: float = 1e-05,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>GroupNorm</code>, <code>WeightedModule</code></p> <p>Group Normalization layer.</p> <p>This layer wraps <code>torch.nn.GroupNorm</code>.</p> <p>Receives:</p> Type Description <code>Float[Tensor, 'batch channels *normalized_shape']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch channels *normalized_shape']</code> Example <pre><code>groupnorm = fl.GroupNorm(channels=128, num_groups=8)\n\ntensor = torch.randn(2, 128, 8)\noutput = groupnorm(tensor)\n\nassert output.shape == (2, 128, 8)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/norm.py</code> <pre><code>def __init__(\n self,\n channels: int,\n num_groups: int,\n eps: float = 1e-5,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n super().__init__( # type: ignore\n num_groups=num_groups,\n num_channels=channels,\n eps=eps,\n affine=True, # otherwise not a WeightedModule\n device=device,\n dtype=dtype,\n )\n self.channels = channels\n self.num_groups = num_groups\n self.eps = eps\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Identity","title":"Identity","text":"<pre><code>Identity()\n</code></pre> <p> Bases: <code>Module</code></p> <p>Identity operator layer.</p> <p>This layer simply returns the input tensor.</p> Example <pre><code>identity = fl.Identity()\n\ntensor = torch.randn(10, 10)\noutput = identity(tensor)\n\nassert torch.equal(tensor, output)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(self) -> None:\n super().__init__()\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.InstanceNorm2d","title":"InstanceNorm2d","text":"<pre><code>InstanceNorm2d(\n num_features: int,\n eps: float = 1e-05,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>InstanceNorm2d</code>, <code>Module</code></p> <p>Instance Normalization layer.</p> <p>This layer wraps <code>torch.nn.InstanceNorm2d</code>.</p> <p>Receives:</p> Type Description <code>Float[Tensor, 'batch channels height width']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch channels height width']</code> Source code in <code>src/refiners/fluxion/layers/norm.py</code> <pre><code>def __init__(\n self,\n num_features: int,\n eps: float = 1e-05,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n super().__init__( # type: ignore\n num_features=num_features,\n eps=eps,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Interpolate","title":"Interpolate","text":"<pre><code>Interpolate(mode: str = 'nearest', antialias: bool = False)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Interpolate layer.</p> <p>This layer wraps <code>torch.nn.functional.interpolate</code>.</p> Source code in <code>src/refiners/fluxion/layers/sampling.py</code> <pre><code>def __init__(\n self,\n mode: str = \"nearest\",\n antialias: bool = False,\n) -> None:\n super().__init__()\n self.mode = mode\n self.antialias = antialias\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Lambda","title":"Lambda","text":"<pre><code>Lambda(func: Callable[..., Any])\n</code></pre> <p> Bases: <code>Module</code></p> <p>Lambda layer.</p> <p>This layer wraps a <code>Callable</code>.</p> When called, it will <ul> <li>Execute the <code>Callable</code> with the given arguments</li> <li>Return the output of the <code>Callable</code>)</li> </ul> Example <pre><code>lambda_layer = fl.Lambda(lambda x: x + 1)\n\ntensor = torch.tensor([1, 2, 3])\noutput = lambda_layer(tensor)\n\nexpected_output = torch.tensor([2, 3, 4])\nassert torch.allclose(output, expected_output)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, func: Callable[..., Any]) -> None:\n super().__init__()\n self.func = func\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.LayerNorm","title":"LayerNorm","text":"<pre><code>LayerNorm(\n normalized_shape: int | list[int],\n eps: float = 1e-05,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>LayerNorm</code>, <code>WeightedModule</code></p> <p>Layer Normalization layer.</p> <p>This layer wraps <code>torch.nn.LayerNorm</code>.</p> <p>Receives:</p> Type Description <code>Float[Tensor, batch * normalized_shape]</code> <p>Returns:</p> Type Description <code>Float[Tensor, batch * normalized_shape]</code> Example <pre><code>layernorm = fl.LayerNorm(normalized_shape=128)\n\ntensor = torch.randn(2, 128)\noutput = layernorm(tensor)\n\nassert output.shape == (2, 128)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/norm.py</code> <pre><code>def __init__(\n self,\n normalized_shape: int | list[int],\n eps: float = 0.00001,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n super().__init__( # type: ignore\n normalized_shape=normalized_shape,\n eps=eps,\n elementwise_affine=True, # otherwise not a WeightedModule\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.LayerNorm2d","title":"LayerNorm2d","text":"<pre><code>LayerNorm2d(\n channels: int,\n eps: float = 1e-06,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>WeightedModule</code></p> <p>2D Layer Normalization layer.</p> <p>This layer applies Layer Normalization along the 2nd dimension of a 4D tensor.</p> <p>Receives:</p> Type Description <code>Float[Tensor, 'batch channels height width']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch channels height width']</code> Source code in <code>src/refiners/fluxion/layers/norm.py</code> <pre><code>def __init__(\n self,\n channels: int,\n eps: float = 1e-6,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n super().__init__()\n self.weight = TorchParameter(torch.ones(channels, device=device, dtype=dtype))\n self.bias = TorchParameter(torch.zeros(channels, device=device, dtype=dtype))\n self.eps = eps\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Linear","title":"Linear","text":"<pre><code>Linear(\n in_features: int,\n out_features: int,\n bias: bool = True,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Linear</code>, <code>WeightedModule</code></p> <p>Linear layer.</p> <p>This layer wraps <code>torch.nn.Linear</code>.</p> <p>Receives:</p> Name Type Description <code>Input</code> <code>Float[Tensor, 'batch in_features']</code> <p>Returns:</p> Name Type Description <code>Output</code> <code>Float[Tensor, 'batch out_features']</code> Example <pre><code>linear = fl.Linear(in_features=32, out_features=128)\n\ntensor = torch.randn(2, 32)\noutput = linear(tensor)\n\nassert output.shape == (2, 128)\n</code></pre> <p>Parameters:</p> Name Type Description Default <code>in_features</code> <code>int</code> <p>The number of input features.</p> required <code>out_features</code> <code>int</code> <p>The number of output features.</p> required <code>bias</code> <code>bool</code> <p>If True, adds a learnable bias to the output.</p> <code>True</code> <code>device</code> <code>device | str | None</code> <p>The device to use for the linear layer.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to use for the linear layer.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/linear.py</code> <pre><code>def __init__(\n self,\n in_features: int,\n out_features: int,\n bias: bool = True,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initializes the Linear layer.\n\n Args:\n in_features: The number of input features.\n out_features: The number of output features.\n bias: If True, adds a learnable bias to the output.\n device: The device to use for the linear layer.\n dtype: The dtype to use for the linear layer.\n \"\"\"\n self.in_features = in_features\n self.out_features = out_features\n super().__init__( # type: ignore\n in_features=in_features,\n out_features=out_features,\n bias=bias,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Matmul","title":"Matmul","text":"<pre><code>Matmul(input: Module, other: Module)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Matrix multiplication layer.</p> <p>This layer returns the matrix multiplication of the outputs of its two sub-modules.</p> Example <pre><code>matmul = fl.Matmul(\n fl.Identity(),\n fl.Multiply(scale=2),\n)\n\ntensor = torch.randn(10, 10)\noutput = matmul(tensor)\n\nexpected_output = tensor @ (2 * tensor)\nassert torch.allclose(output, expected_output)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, input: Module, other: Module) -> None:\n super().__init__(\n input,\n other,\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.MaxPool1d","title":"MaxPool1d","text":"<pre><code>MaxPool1d(\n kernel_size: int,\n stride: int | None = None,\n padding: int = 0,\n dilation: int = 1,\n return_indices: bool = False,\n ceil_mode: bool = False,\n)\n</code></pre> <p> Bases: <code>MaxPool1d</code>, <code>Module</code></p> <p>MaxPool1d layer.</p> <p>This layer wraps <code>torch.nn.MaxPool1d</code>.</p> <p>Receives:</p> Type Description <code>Float[Tensor, 'batch channels in_length']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch channels out_length']</code> <p>Parameters:</p> Name Type Description Default <code>kernel_size</code> <code>int</code> <p>The size of the sliding window.</p> required <code>stride</code> <code>int | None</code> <p>The stride of the sliding window.</p> <code>None</code> <code>padding</code> <code>int</code> <p>The amount of zero-padding added to both sides of the input.</p> <code>0</code> <code>dilation</code> <code>int</code> <p>The spacing between kernel elements.</p> <code>1</code> <code>return_indices</code> <code>bool</code> <p>If True, returns the max indices along with the outputs.</p> <code>False</code> <code>ceil_mode</code> <code>bool</code> <p>If True, uses ceil instead of floor to compute the output shape.</p> <code>False</code> Source code in <code>src/refiners/fluxion/layers/maxpool.py</code> <pre><code>def __init__(\n self,\n kernel_size: int,\n stride: int | None = None,\n padding: int = 0,\n dilation: int = 1,\n return_indices: bool = False,\n ceil_mode: bool = False,\n) -> None:\n \"\"\"Initializes the MaxPool1d layer.\n\n Args:\n kernel_size: The size of the sliding window.\n stride: The stride of the sliding window.\n padding: The amount of zero-padding added to both sides of the input.\n dilation: The spacing between kernel elements.\n return_indices: If True, returns the max indices along with the outputs.\n ceil_mode: If True, uses ceil instead of floor to compute the output shape.\n \"\"\"\n super().__init__(\n kernel_size=kernel_size,\n stride=stride,\n padding=padding,\n dilation=dilation,\n return_indices=return_indices,\n ceil_mode=ceil_mode,\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.MaxPool2d","title":"MaxPool2d","text":"<pre><code>MaxPool2d(\n kernel_size: int | tuple[int, int],\n stride: int | tuple[int, int] | None = None,\n padding: int | tuple[int, int] = (0, 0),\n dilation: int | tuple[int, int] = (1, 1),\n return_indices: bool = False,\n ceil_mode: bool = False,\n)\n</code></pre> <p> Bases: <code>MaxPool2d</code>, <code>Module</code></p> <p>MaxPool2d layer.</p> <p>This layer wraps <code>torch.nn.MaxPool2d</code>.</p> <p>Receives:</p> Type Description <code>Float[Tensor, 'batch channels in_height in_width']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch channels out_height out_width']</code> <p>Parameters:</p> Name Type Description Default <code>kernel_size</code> <code>int | tuple[int, int]</code> <p>The size of the sliding window.</p> required <code>stride</code> <code>int | tuple[int, int] | None</code> <p>The stride of the sliding window.</p> <code>None</code> <code>padding</code> <code>int | tuple[int, int]</code> <p>The amount of zero-padding added to both sides of the input.</p> <code>(0, 0)</code> <code>dilation</code> <code>int | tuple[int, int]</code> <p>The spacing between kernel elements.</p> <code>(1, 1)</code> <code>return_indices</code> <code>bool</code> <p>If True, returns the max indices along with the outputs.</p> <code>False</code> <code>ceil_mode</code> <code>bool</code> <p>If True, uses ceil instead of floor to compute the output shape.</p> <code>False</code> Source code in <code>src/refiners/fluxion/layers/maxpool.py</code> <pre><code>def __init__(\n self,\n kernel_size: int | tuple[int, int],\n stride: int | tuple[int, int] | None = None,\n padding: int | tuple[int, int] = (0, 0),\n dilation: int | tuple[int, int] = (1, 1),\n return_indices: bool = False,\n ceil_mode: bool = False,\n) -> None:\n \"\"\"Initializes the MaxPool2d layer.\n\n Args:\n kernel_size: The size of the sliding window.\n stride: The stride of the sliding window.\n padding: The amount of zero-padding added to both sides of the input.\n dilation: The spacing between kernel elements.\n return_indices: If True, returns the max indices along with the outputs.\n ceil_mode: If True, uses ceil instead of floor to compute the output shape.\n \"\"\"\n super().__init__(\n kernel_size=kernel_size,\n stride=stride,\n padding=padding,\n dilation=dilation,\n return_indices=return_indices,\n ceil_mode=ceil_mode,\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Module","title":"Module","text":"<pre><code>Module(*args: Any, **kwargs: Any)\n</code></pre> <p> Bases: <code>Module</code></p> <p>A wrapper around <code>torch.nn.Module</code>.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def __init__(self, *args: Any, **kwargs: Any) -> None:\n super().__init__(*args, *kwargs) # type: ignore[reportUnknownMemberType]\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Module.basic_attributes","title":"basic_attributes","text":"<pre><code>basic_attributes(\n init_attrs_only: bool = False,\n) -> dict[str, BasicType | Sequence[BasicType]]\n</code></pre> <p>Return a dictionary of basic attributes of the module.</p> <p>Parameters:</p> Name Type Description Default <code>init_attrs_only</code> <code>bool</code> <p>Whether to only return attributes that are passed to the module's constructor.</p> <code>False</code> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def basic_attributes(self, init_attrs_only: bool = False) -> dict[str, BasicType | Sequence[BasicType]]:\n \"\"\"Return a dictionary of basic attributes of the module.\n\n Args:\n init_attrs_only: Whether to only return attributes that are passed to the module's constructor.\n \"\"\"\n sig = signature(obj=self.__init__)\n init_params = set(sig.parameters.keys()) - {\"self\"}\n default_values = {k: v.default for k, v in sig.parameters.items() if v.default is not Parameter.empty}\n\n def is_basic_attribute(key: str, value: Any) -> bool:\n if key.startswith(\"_\"):\n return False\n\n if isinstance(value, BasicType):\n return True\n\n if isinstance(value, Sequence) and all(isinstance(y, BasicType) for y in cast(Sequence[Any], value)):\n return True\n\n return False\n\n return {\n key: value\n for key, value in self.__dict__.items()\n if is_basic_attribute(key=key, value=value)\n and (not init_attrs_only or (key in init_params and value != default_values.get(key)))\n }\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Module.get_path","title":"get_path","text":"<pre><code>get_path(\n parent: Chain | None = None, top: Module | None = None\n) -> str\n</code></pre> <p>Get the path of the module in the chain.</p> <p>Parameters:</p> Name Type Description Default <code>parent</code> <code>Chain | None</code> <p>The parent of the module in the chain.</p> <code>None</code> <code>top</code> <code>Module | None</code> <p>The top module of the chain. If None, the path will be relative to the root of the chain.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def get_path(self, parent: \"Chain | None\" = None, top: \"Module | None\" = None) -> str:\n \"\"\"Get the path of the module in the chain.\n\n Args:\n parent: The parent of the module in the chain.\n top: The top module of the chain.\n If None, the path will be relative to the root of the chain.\n \"\"\"\n if (parent is None) or (self == top):\n return self.__class__.__name__\n for k, m in parent._modules.items(): # type: ignore\n if m is self:\n return parent.get_path(parent=parent.parent, top=top) + \".\" + k\n raise ValueError(f\"{self} not found in {parent}\")\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Module.load_from_safetensors","title":"load_from_safetensors","text":"<pre><code>load_from_safetensors(\n tensors_path: str | Path, strict: bool = True\n) -> T\n</code></pre> <p>Load the module's state from a SafeTensors file.</p> <p>Parameters:</p> Name Type Description Default <code>tensors_path</code> <code>str | Path</code> <p>The path to the SafeTensors file.</p> required <code>strict</code> <code>bool</code> <p>Whether to raise an error if the SafeTensors's content doesn't map perfectly to the module's state.</p> <code>True</code> <p>Returns:</p> Type Description <code>T</code> <p>The module, with its state loaded from the SafeTensors file.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def load_from_safetensors(self: T, tensors_path: str | Path, strict: bool = True) -> T:\n \"\"\"Load the module's state from a SafeTensors file.\n\n Args:\n tensors_path: The path to the SafeTensors file.\n strict: Whether to raise an error if the SafeTensors's\n content doesn't map perfectly to the module's state.\n\n Returns:\n The module, with its state loaded from the SafeTensors file.\n \"\"\"\n state_dict = load_from_safetensors(tensors_path)\n self.load_state_dict(state_dict, strict=strict)\n return self\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Module.named_modules","title":"named_modules","text":"<pre><code>named_modules(\n *args: Any, **kwargs: Any\n) -> Generator[tuple[str, Module], None, None]\n</code></pre> <p>Get all the sub-modules of the module.</p> <p>Returns:</p> Type Description <code>None</code> <p>An iterator over all the sub-modules of the module.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def named_modules(self, *args: Any, **kwargs: Any) -> \"Generator[tuple[str, Module], None, None]\": # type: ignore\n \"\"\"Get all the sub-modules of the module.\n\n Returns:\n An iterator over all the sub-modules of the module.\n \"\"\"\n return super().named_modules(*args) # type: ignore\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Module.pretty_print","title":"pretty_print","text":"<pre><code>pretty_print(depth: int = -1) -> None\n</code></pre> <p>Print the module in a tree-like format.</p> <p>Parameters:</p> Name Type Description Default <code>depth</code> <code>int</code> <p>The maximum depth of the tree to print. If negative, the whole tree is printed.</p> <code>-1</code> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def pretty_print(self, depth: int = -1) -> None:\n \"\"\"Print the module in a tree-like format.\n\n Args:\n depth: The maximum depth of the tree to print.\n If negative, the whole tree is printed.\n \"\"\"\n tree = ModuleTree(module=self)\n print(tree._generate_tree_repr(tree.root, is_root=True, depth=depth)) # type: ignore[reportPrivateUsage]\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Module.to","title":"to","text":"<pre><code>to(\n device: device | str | None = None,\n dtype: dtype | None = None,\n) -> T\n</code></pre> <p>Move the module to the given device and cast its parameters to the given dtype.</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The device to move the module to.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to cast the module's parameters to.</p> <code>None</code> <p>Returns:</p> Type Description <code>T</code> <p>The module, moved to the given device and cast to the given dtype.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def to(self: T, device: Device | str | None = None, dtype: DType | None = None) -> T: # type: ignore\n \"\"\"Move the module to the given device and cast its parameters to the given dtype.\n\n Args:\n device: The device to move the module to.\n dtype: The dtype to cast the module's parameters to.\n\n Returns:\n The module, moved to the given device and cast to the given dtype.\n \"\"\"\n return super().to(device=device, dtype=dtype) # type: ignore\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.MultiLinear","title":"MultiLinear","text":"<pre><code>MultiLinear(\n input_dim: int,\n output_dim: int,\n inner_dim: int,\n num_layers: int,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Multi-layer linear network.</p> <p>This layer wraps multiple <code>torch.nn.Linear</code> layers, with an <code>Activation</code> layer in between.</p> <p>Receives:</p> Name Type Description <code>Input</code> <code>Float[Tensor, 'batch input_dim']</code> <p>Returns:</p> Name Type Description <code>Output</code> <code>Float[Tensor, 'batch output_dim']</code> Example <pre><code>linear = fl.MultiLinear(\n input_dim=32,\n output_dim=128,\n inner_dim=64,\n num_layers=3,\n)\n\ntensor = torch.randn(2, 32)\noutput = linear(tensor)\n\nassert output.shape == (2, 128)\n</code></pre> <p>Parameters:</p> Name Type Description Default <code>input_dim</code> <code>int</code> <p>The input dimension of the first linear layer.</p> required <code>output_dim</code> <code>int</code> <p>The output dimension of the last linear layer.</p> required <code>inner_dim</code> <code>int</code> <p>The output dimension of the inner linear layers.</p> required <code>num_layers</code> <code>int</code> <p>The number of linear layers.</p> required <code>device</code> <code>device | str | None</code> <p>The device to use for the linear layers.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to use for the linear layers.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/linear.py</code> <pre><code>def __init__(\n self,\n input_dim: int,\n output_dim: int,\n inner_dim: int,\n num_layers: int,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initializes the MultiLinear layer.\n\n Args:\n input_dim: The input dimension of the first linear layer.\n output_dim: The output dimension of the last linear layer.\n inner_dim: The output dimension of the inner linear layers.\n num_layers: The number of linear layers.\n device: The device to use for the linear layers.\n dtype: The dtype to use for the linear layers.\n \"\"\"\n layers: list[Module] = []\n for i in range(num_layers - 1):\n layers.append(\n Linear(\n in_features=input_dim if i == 0 else inner_dim,\n out_features=inner_dim,\n device=device,\n dtype=dtype,\n )\n )\n layers.append(\n ReLU(),\n )\n layers.append(\n Linear(\n in_features=inner_dim,\n out_features=output_dim,\n device=device,\n dtype=dtype,\n )\n )\n\n super().__init__(layers)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Multiply","title":"Multiply","text":"<pre><code>Multiply(scale: float = 1.0, bias: float = 0.0)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Multiply operator layer.</p> <p>This layer scales and shifts the input tensor by the given scale and bias.</p> Example <pre><code>multiply = fl.Multiply(scale=2, bias=1)\n\ntensor = torch.ones(1)\noutput = multiply(tensor)\n\nassert torch.allclose(output, torch.tensor([3.0]))\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(\n self,\n scale: float = 1.0,\n bias: float = 0.0,\n) -> None:\n super().__init__()\n self.scale = scale\n self.bias = bias\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Parallel","title":"Parallel","text":"<pre><code>Parallel(*args: Module | Iterable[Module])\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Parallel layer.</p> <p>This layer calls its sub-modules in parallel with the same inputs, and returns a tuple of their outputs.</p> Example <pre><code>parallel = fl.Parallel(\n fl.Linear(32, 64),\n fl.Identity(),\n fl.Linear(32, 128),\n)\n\ntensor = torch.randn(2, 32)\noutputs = parallel(tensor)\n\nassert len(outputs) == 3\nassert outputs[0].shape == (2, 64)\nassert torch.allclose(outputs[1], tensor)\nassert outputs[2].shape == (2, 128)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, *args: Module | Iterable[Module]) -> None:\n super().__init__()\n self._provider = ContextProvider()\n modules = cast(\n tuple[Module],\n (\n tuple(args[0])\n if len(args) == 1 and isinstance(args[0], Iterable) and not isinstance(args[0], Chain)\n else tuple(args)\n ),\n )\n\n for module in modules:\n # Violating this would mean a ContextModule ends up in two chains,\n # with a single one correctly set as its parent.\n assert (\n (not isinstance(module, ContextModule))\n or (not module._can_refresh_parent)\n or (module.parent is None)\n or (module.parent == self)\n ), f\"{module.__class__.__name__} already has parent {module.parent.__class__.__name__}\"\n\n self._regenerate_keys(modules)\n self._reset_context()\n\n for module in self:\n if isinstance(module, ContextModule) and module.parent != self:\n module._set_parent(self)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Parameter","title":"Parameter","text":"<pre><code>Parameter(\n *dims: int,\n requires_grad: bool = True,\n device: device | str | None = None,\n dtype: dtype | None = None\n)\n</code></pre> <p> Bases: <code>WeightedModule</code></p> <p>Parameter layer.</p> <p>This layer simple wraps a PyTorch <code>Parameter</code>. When called, it simply returns the <code>Parameter</code> Tensor.</p> <p>Attributes:</p> Name Type Description <code>weight</code> <code>Parameter</code> <p>The parameter Tensor.</p> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(\n self,\n *dims: int,\n requires_grad: bool = True,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n super().__init__()\n self.dims = dims\n self.weight = TorchParameter(\n requires_grad=requires_grad,\n data=torch.randn(\n *dims,\n device=device,\n dtype=dtype,\n ),\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Passthrough","title":"Passthrough","text":"<pre><code>Passthrough(*args: Module | Iterable[Module])\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Passthrough layer.</p> <p>This layer call its sub-modules sequentially, and returns its original inputs, like an <code>Identity</code> layer.</p> Example <pre><code>passthrough = fl.Passthrough(\n fl.Linear(32, 128),\n fl.ReLU(),\n fl.Linear(128, 128),\n)\n\ntensor = torch.randn(2, 32)\noutput = passthrough(tensor)\n\nassert torch.allclose(output, tensor)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, *args: Module | Iterable[Module]) -> None:\n super().__init__()\n self._provider = ContextProvider()\n modules = cast(\n tuple[Module],\n (\n tuple(args[0])\n if len(args) == 1 and isinstance(args[0], Iterable) and not isinstance(args[0], Chain)\n else tuple(args)\n ),\n )\n\n for module in modules:\n # Violating this would mean a ContextModule ends up in two chains,\n # with a single one correctly set as its parent.\n assert (\n (not isinstance(module, ContextModule))\n or (not module._can_refresh_parent)\n or (module.parent is None)\n or (module.parent == self)\n ), f\"{module.__class__.__name__} already has parent {module.parent.__class__.__name__}\"\n\n self._regenerate_keys(modules)\n self._reset_context()\n\n for module in self:\n if isinstance(module, ContextModule) and module.parent != self:\n module._set_parent(self)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Permute","title":"Permute","text":"<pre><code>Permute(*dims: int)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Permute operation layer.</p> <p>This layer permutes the input tensor according to the given dimensions. See also <code>torch.permute</code>.</p> Example <pre><code>permute = fl.Permute(2, 0, 1)\n\ntensor = torch.randn(10, 20, 30)\noutput = permute(tensor)\n\nassert output.shape == (30, 10, 20)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(self, *dims: int) -> None:\n super().__init__()\n self.dims = dims\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.PixelUnshuffle","title":"PixelUnshuffle","text":"<pre><code>PixelUnshuffle(downscale_factor: int)\n</code></pre> <p> Bases: <code>PixelUnshuffle</code>, <code>Module</code></p> <p>Pixel Unshuffle layer.</p> <p>This layer wraps <code>torch.nn.PixelUnshuffle</code>.</p> <p>Receives:</p> Type Description <code>Float[Tensor, 'batch in_channels in_height in_width']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch out_channels out_height out_width']</code> Source code in <code>src/refiners/fluxion/layers/pixelshuffle.py</code> <pre><code>def __init__(self, downscale_factor: int):\n _PixelUnshuffle.__init__(self, downscale_factor=downscale_factor)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ReLU","title":"ReLU","text":"<pre><code>ReLU()\n</code></pre> <p> Bases: <code>Activation</code></p> <p>Rectified Linear Unit activation function.</p> <p>See Rectified Linear Units Improve Restricted Boltzmann Machines and Cognitron: A self-organizing multilayered neural network</p> Example <pre><code>relu = fl.ReLU()\n\ntensor = torch.tensor([[-1.0, 0.0, 1.0]])\noutput = relu(tensor)\n\nexpected_output = torch.tensor([[0.0, 0.0, 1.0]])\nassert torch.equal(output, expected_output)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/activations.py</code> <pre><code>def __init__(self) -> None:\n super().__init__()\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ReflectionPad2d","title":"ReflectionPad2d","text":"<pre><code>ReflectionPad2d(padding: int)\n</code></pre> <p> Bases: <code>ReflectionPad2d</code>, <code>Module</code></p> <p>Reflection padding layer.</p> <p>This layer wraps <code>torch.nn.ReflectionPad2d</code>.</p> <p>Receives:</p> Type Description <code>Float[Tensor, 'batch channels in_height in_width']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch channels out_height out_width']</code> Source code in <code>src/refiners/fluxion/layers/padding.py</code> <pre><code>def __init__(self, padding: int) -> None:\n super().__init__(padding=padding)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Reshape","title":"Reshape","text":"<pre><code>Reshape(*shape: int)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Reshape operation layer.</p> <p>This layer reshapes the input tensor to a specific shape (which must be compatible with the original shape). See also torch.reshape.</p> Warning <p>The first dimension (batch dimension) is forcefully preserved.</p> Example <pre><code>reshape = fl.Reshape(5, 2)\n\ntensor = torch.randn(2, 10, 1)\noutput = reshape(tensor)\n\nassert output.shape == (2, 5, 2)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(self, *shape: int) -> None:\n super().__init__()\n self.shape = shape\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Residual","title":"Residual","text":"<pre><code>Residual(*args: Module | Iterable[Module])\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Residual layer.</p> <p>This layer calls its sub-modules sequentially, and adds the original input to the output.</p> Example <pre><code>residual = fl.Residual(\n fl.Multiply(scale=10),\n)\n\ntensor = torch.ones(2, 32)\noutput = residual(tensor)\n\nassert output.shape == (2, 32)\nassert torch.allclose(output, 10 * tensor + tensor)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, *args: Module | Iterable[Module]) -> None:\n super().__init__()\n self._provider = ContextProvider()\n modules = cast(\n tuple[Module],\n (\n tuple(args[0])\n if len(args) == 1 and isinstance(args[0], Iterable) and not isinstance(args[0], Chain)\n else tuple(args)\n ),\n )\n\n for module in modules:\n # Violating this would mean a ContextModule ends up in two chains,\n # with a single one correctly set as its parent.\n assert (\n (not isinstance(module, ContextModule))\n or (not module._can_refresh_parent)\n or (module.parent is None)\n or (module.parent == self)\n ), f\"{module.__class__.__name__} already has parent {module.parent.__class__.__name__}\"\n\n self._regenerate_keys(modules)\n self._reset_context()\n\n for module in self:\n if isinstance(module, ContextModule) and module.parent != self:\n module._set_parent(self)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Return","title":"Return","text":"<pre><code>Return(*args: Any, **kwargs: Any)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Return layer.</p> <p>This layer stops the execution of a Chain when encountered.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def __init__(self, *args: Any, **kwargs: Any) -> None:\n super().__init__(*args, *kwargs) # type: ignore[reportUnknownMemberType]\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.ScaledDotProductAttention","title":"ScaledDotProductAttention","text":"<pre><code>ScaledDotProductAttention(\n num_heads: int = 1,\n is_causal: bool = False,\n is_optimized: bool = True,\n slice_size: int | None = None,\n)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Scaled Dot Product Attention.</p> See [arXiv:1706.03762] Attention Is All You Need (Figure 2) for more details <p></p> Note <p>This layer simply wraps <code>scaled_dot_product_attention</code> inside an <code>fl.Module</code>.</p> <p>Receives:</p> Name Type Description <code>Query</code> <code>Float[Tensor, 'batch num_queries embedding_dim']</code> <code>Key</code> <code>Float[Tensor, 'batch num_keys embedding_dim']</code> <code>Value</code> <code>Float[Tensor, 'batch num_values embedding_dim']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch num_queries embedding_dim']</code> Example <pre><code>attention = fl.ScaledDotProductAttention(num_heads=8)\n\nquery = torch.randn(2, 10, 128)\nkey = torch.randn(2, 10, 128)\nvalue = torch.randn(2, 10, 128)\noutput = attention(query, key, value)\n\nassert output.shape == (2, 10, 128)\n</code></pre> <p>Parameters:</p> Name Type Description Default <code>num_heads</code> <code>int</code> <p>The number of heads to use.</p> <code>1</code> <code>is_causal</code> <code>bool</code> <p>Whether to use causal attention.</p> <code>False</code> <code>is_optimized</code> <code>bool</code> <p>Whether to use optimized attention.</p> <code>True</code> <code>slice_size</code> <code>int | None</code> <p>The slice size to use for the optimized attention.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/attentions.py</code> <pre><code>def __init__(\n self,\n num_heads: int = 1,\n is_causal: bool = False,\n is_optimized: bool = True,\n slice_size: int | None = None,\n) -> None:\n \"\"\"Initialize the Scaled Dot Product Attention layer.\n\n Args:\n num_heads: The number of heads to use.\n is_causal: Whether to use causal attention.\n is_optimized: Whether to use optimized attention.\n slice_size: The slice size to use for the optimized attention.\n \"\"\"\n super().__init__()\n self.num_heads = num_heads\n self.is_causal = is_causal\n self.is_optimized = is_optimized\n self.slice_size = slice_size\n self.dot_product = (\n scaled_dot_product_attention if self.is_optimized else scaled_dot_product_attention_non_optimized\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.SelfAttention","title":"SelfAttention","text":"<pre><code>SelfAttention(\n embedding_dim: int,\n inner_dim: int | None = None,\n num_heads: int = 1,\n use_bias: bool = True,\n is_causal: bool = False,\n is_optimized: bool = True,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Attention</code></p> <p>Multi-Head Self-Attention layer.</p> This layer simply chains <ul> <li>a <code>Parallel</code> layer, which duplicates the input Tensor (for each Linear layer in the <code>Attention</code> layer)</li> <li>an <code>Attention</code> layer</li> </ul> <p>Receives:</p> Type Description <code>Float[Tensor, 'batch sequence_length embedding_dim']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch sequence_length embedding_dim']</code> Example <pre><code>self_attention = fl.SelfAttention(num_heads=8, embedding_dim=128)\n\ntensor = torch.randn(2, 10, 128)\noutput = self_attention(tensor)\n\nassert output.shape == (2, 10, 128)\n</code></pre> <p>Parameters:</p> Name Type Description Default <code>embedding_dim</code> <code>int</code> <p>The embedding dimension of the input and output tensors.</p> required <code>inner_dim</code> <code>int | None</code> <p>The inner dimension of the linear layers.</p> <code>None</code> <code>num_heads</code> <code>int</code> <p>The number of heads to use.</p> <code>1</code> <code>use_bias</code> <code>bool</code> <p>Whether to use bias in the linear layers.</p> <code>True</code> <code>is_causal</code> <code>bool</code> <p>Whether to use causal attention.</p> <code>False</code> <code>is_optimized</code> <code>bool</code> <p>Whether to use optimized attention.</p> <code>True</code> <code>device</code> <code>device | str | None</code> <p>The device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to use.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/attentions.py</code> <pre><code>def __init__(\n self,\n embedding_dim: int,\n inner_dim: int | None = None,\n num_heads: int = 1,\n use_bias: bool = True,\n is_causal: bool = False,\n is_optimized: bool = True,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize the Self-Attention layer.\n\n Args:\n embedding_dim: The embedding dimension of the input and output tensors.\n inner_dim: The inner dimension of the linear layers.\n num_heads: The number of heads to use.\n use_bias: Whether to use bias in the linear layers.\n is_causal: Whether to use causal attention.\n is_optimized: Whether to use optimized attention.\n device: The device to use.\n dtype: The dtype to use.\n \"\"\"\n super().__init__(\n embedding_dim=embedding_dim,\n inner_dim=inner_dim,\n num_heads=num_heads,\n use_bias=use_bias,\n is_causal=is_causal,\n is_optimized=is_optimized,\n device=device,\n dtype=dtype,\n )\n self.insert(\n index=0,\n module=Parallel(\n Identity(), # Query projection's input\n Identity(), # Key projection's input\n Identity(), # Value projection's input\n ),\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.SelfAttention2d","title":"SelfAttention2d","text":"<pre><code>SelfAttention2d(\n channels: int,\n num_heads: int = 1,\n use_bias: bool = True,\n is_causal: bool = False,\n is_optimized: bool = True,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>SelfAttention</code></p> <p>Multi-Head 2D Self-Attention layer.</p> This Module simply chains <ul> <li>a <code>Lambda</code> layer, which transforms the input Tensor into a sequence</li> <li>a <code>SelfAttention</code> layer</li> <li>a <code>Lambda</code> layer, which transforms the output sequence into a 2D Tensor</li> </ul> <p>Receives:</p> Type Description <code>Float[Tensor, 'batch channels height width']</code> <p>Returns:</p> Type Description <code>Float[Tensor, 'batch channels height width']</code> Example <pre><code>self_attention = fl.SelfAttention2d(channels=128, num_heads=8)\n\ntensor = torch.randn(2, 128, 64, 64)\noutput = self_attention(tensor)\n\nassert output.shape == (2, 128, 64, 64)\n</code></pre> <p>Parameters:</p> Name Type Description Default <code>channels</code> <code>int</code> <p>The number of channels of the input and output tensors.</p> required <code>num_heads</code> <code>int</code> <p>The number of heads to use.</p> <code>1</code> <code>use_bias</code> <code>bool</code> <p>Whether to use bias in the linear layers.</p> <code>True</code> <code>is_causal</code> <code>bool</code> <p>Whether to use causal attention.</p> <code>False</code> <code>is_optimized</code> <code>bool</code> <p>Whether to use optimized attention.</p> <code>True</code> <code>device</code> <code>device | str | None</code> <p>The device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to use.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/attentions.py</code> <pre><code>def __init__(\n self,\n channels: int,\n num_heads: int = 1,\n use_bias: bool = True,\n is_causal: bool = False,\n is_optimized: bool = True,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize the 2D Self-Attention layer.\n\n Args:\n channels: The number of channels of the input and output tensors.\n num_heads: The number of heads to use.\n use_bias: Whether to use bias in the linear layers.\n is_causal: Whether to use causal attention.\n is_optimized: Whether to use optimized attention.\n device: The device to use.\n dtype: The dtype to use.\n \"\"\"\n assert channels % num_heads == 0, f\"channels {channels} must be divisible by num_heads {num_heads}\"\n self.channels = channels\n\n super().__init__(\n embedding_dim=channels,\n num_heads=num_heads,\n use_bias=use_bias,\n is_causal=is_causal,\n is_optimized=is_optimized,\n device=device,\n dtype=dtype,\n )\n\n self.insert(0, Lambda(self._tensor_2d_to_sequence))\n self.append(Lambda(self._sequence_to_tensor_2d))\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.SetContext","title":"SetContext","text":"<pre><code>SetContext(\n context: str,\n key: str,\n callback: Callable[[Any, Any], Any] | None = None,\n)\n</code></pre> <p> Bases: <code>ContextModule</code></p> <p>SetContext layer.</p> <p>This layer writes to the <code>ContextProvider</code> of its parent <code>Chain</code>.</p> When called (without a callback), it will <ul> <li>Update the context with the given key and the input value</li> <li>Return the input value</li> </ul> When called (with a callback), it will <ul> <li>Call the callback with the current value and the input value (the callback may update the context with a new value, or not)</li> <li>Return the input value</li> </ul> Warning <p>The context needs to already exist in the <code>ContextProvider</code></p> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(\n self,\n context: str,\n key: str,\n callback: Callable[[Any, Any], Any] | None = None,\n) -> None:\n super().__init__()\n self.context = context\n self.key = key\n self.callback = callback\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.SiLU","title":"SiLU","text":"<pre><code>SiLU()\n</code></pre> <p> Bases: <code>Activation</code></p> <p>Sigmoid Linear Unit activation function.</p> <p>See [arXiv:1702.03118] Sigmoid-Weighted Linear Units for Neural Network Function Approximation in Reinforcement Learning for more details.</p> Source code in <code>src/refiners/fluxion/layers/activations.py</code> <pre><code>def __init__(self) -> None:\n super().__init__()\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Sigmoid","title":"Sigmoid","text":"<pre><code>Sigmoid()\n</code></pre> <p> Bases: <code>Activation</code></p> <p>Sigmoid activation function.</p> Example <pre><code>sigmoid = fl.Sigmoid()\n\ntensor = torch.tensor([[-1.0, 0.0, 1.0]])\noutput = sigmoid(tensor)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/activations.py</code> <pre><code>def __init__(self) -> None:\n super().__init__()\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Sin","title":"Sin","text":"<pre><code>Sin(*args: Any, **kwargs: Any)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Sine operator layer.</p> <p>This layer applies the sine function to the input tensor. See also <code>torch.sin</code>.</p> Example <pre><code>sin = fl.Sin()\n\ntensor = torch.tensor([0, torch.pi])\noutput = sin(tensor)\n\nexpected_output = torch.tensor([0.0, 0.0])\nassert torch.allclose(output, expected_output, atol=1e-6)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def __init__(self, *args: Any, **kwargs: Any) -> None:\n super().__init__(*args, *kwargs) # type: ignore[reportUnknownMemberType]\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Slicing","title":"Slicing","text":"<pre><code>Slicing(\n dim: int = 0,\n start: int = 0,\n end: int | None = None,\n step: int = 1,\n)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Slicing operation layer.</p> <p>This layer slices the input tensor at the given dimension between the given start and end indices. See also <code>torch.index_select</code>.</p> Example <pre><code>slicing = fl.Slicing(dim=1, start=50)\n\ntensor = torch.randn(10, 100)\noutput = slicing(tensor)\n\nassert output.shape == (10, 50)\nassert torch.allclose(output, tensor[:, 50:])\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(\n self,\n dim: int = 0,\n start: int = 0,\n end: int | None = None,\n step: int = 1,\n) -> None:\n super().__init__()\n self.dim = dim\n self.start = start\n self.end = end\n self.step = step\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Squeeze","title":"Squeeze","text":"<pre><code>Squeeze(dim: int)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Squeeze operation layer.</p> <p>This layer squeezes the input tensor at the given dimension. See also <code>torch.squeeze</code>.</p> Example <pre><code>squeeze = fl.Squeeze(dim=1)\n\ntensor = torch.randn(10, 1, 10)\noutput = squeeze(tensor)\n\nassert output.shape == (10, 10)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(self, dim: int) -> None:\n super().__init__()\n self.dim = dim\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Sum","title":"Sum","text":"<pre><code>Sum(*args: Module | Iterable[Module])\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Summation layer.</p> <p>This layer calls its sub-modules in parallel with the same inputs, and returns the sum of their outputs.</p> Example <pre><code>summation = fl.Sum(\n fl.Multiply(scale=2, bias=1),\n fl.Multiply(scale=3, bias=0),\n)\n\ntensor = torch.ones(1)\noutput = summation(tensor)\n\nassert torch.allclose(output, torch.tensor([6.0]))\n</code></pre> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, *args: Module | Iterable[Module]) -> None:\n super().__init__()\n self._provider = ContextProvider()\n modules = cast(\n tuple[Module],\n (\n tuple(args[0])\n if len(args) == 1 and isinstance(args[0], Iterable) and not isinstance(args[0], Chain)\n else tuple(args)\n ),\n )\n\n for module in modules:\n # Violating this would mean a ContextModule ends up in two chains,\n # with a single one correctly set as its parent.\n assert (\n (not isinstance(module, ContextModule))\n or (not module._can_refresh_parent)\n or (module.parent is None)\n or (module.parent == self)\n ), f\"{module.__class__.__name__} already has parent {module.parent.__class__.__name__}\"\n\n self._regenerate_keys(modules)\n self._reset_context()\n\n for module in self:\n if isinstance(module, ContextModule) and module.parent != self:\n module._set_parent(self)\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Transpose","title":"Transpose","text":"<pre><code>Transpose(dim0: int, dim1: int)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Transpose operation layer.</p> <p>This layer transposes the input tensor between the two given dimensions. See also <code>torch.transpose</code>.</p> Example <pre><code>transpose = fl.Transpose(dim0=1, dim1=2)\n\ntensor = torch.randn(10, 20, 30)\noutput = transpose(tensor)\n\nassert output.shape == (10, 30, 20)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(self, dim0: int, dim1: int) -> None:\n super().__init__()\n self.dim0 = dim0\n self.dim1 = dim1\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Unflatten","title":"Unflatten","text":"<pre><code>Unflatten(dim: int)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Unflatten operation layer.</p> <p>This layer unflattens the input tensor at the given dimension with the given sizes. See also <code>torch.unflatten</code>.</p> Example <pre><code>unflatten = fl.Unflatten(dim=1)\n\ntensor = torch.randn(10, 100)\noutput = unflatten(tensor, sizes=(10, 10))\n\nassert output_unflatten.shape == (10, 10, 10)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(self, dim: int) -> None:\n super().__init__()\n self.dim = dim\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Unsqueeze","title":"Unsqueeze","text":"<pre><code>Unsqueeze(dim: int)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Unsqueeze operation layer.</p> <p>This layer unsqueezes the input tensor at the given dimension. See also <code>torch.unsqueeze</code>.</p> Example <pre><code>unsqueeze = fl.Unsqueeze(dim=1)\n\ntensor = torch.randn(10, 10)\noutput = unsqueeze(tensor)\n\nassert output.shape == (10, 1, 10)\n</code></pre> Source code in <code>src/refiners/fluxion/layers/basics.py</code> <pre><code>def __init__(self, dim: int) -> None:\n super().__init__()\n self.dim = dim\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.Upsample","title":"Upsample","text":"<pre><code>Upsample(\n channels: int,\n upsample_factor: int | None = None,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Upsample layer.</p> <p>This layer upsamples the input by the given scale factor.</p> <p>Raises:</p> Type Description <code>RuntimeError</code> <p>If the context sampling is not set or if the context is empty.</p> <p>Parameters:</p> Name Type Description Default <code>channels</code> <code>int</code> <p>The number of input and output channels.</p> required <code>upsample_factor</code> <code>int | None</code> <p>The factor by which to upsample the input. If None, the input shape is taken from the context.</p> <code>None</code> <code>device</code> <code>device | str | None</code> <p>The device to use for the convolutional layer.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to use for the convolutional layer.</p> <code>None</code> Source code in <code>src/refiners/fluxion/layers/sampling.py</code> <pre><code>def __init__(\n self,\n channels: int,\n upsample_factor: int | None = None,\n device: Device | str | None = None,\n dtype: DType | None = None,\n):\n \"\"\"Initializes the Upsample layer.\n\n Args:\n channels: The number of input and output channels.\n upsample_factor: The factor by which to upsample the input.\n If None, the input shape is taken from the context.\n device: The device to use for the convolutional layer.\n dtype: The dtype to use for the convolutional layer.\n \"\"\"\n self.channels = channels\n self.upsample_factor = upsample_factor\n super().__init__(\n Parallel(\n Identity(),\n (\n Lambda(self._get_static_shape)\n if upsample_factor is not None\n else UseContext(context=\"sampling\", key=\"shapes\").compose(lambda x: x.pop())\n ),\n ),\n Interpolate(),\n Conv2d(\n in_channels=channels,\n out_channels=channels,\n kernel_size=3,\n padding=1,\n device=device,\n dtype=dtype,\n ),\n )\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.UseContext","title":"UseContext","text":"<pre><code>UseContext(context: str, key: str)\n</code></pre> <p> Bases: <code>ContextModule</code></p> <p>UseContext layer.</p> <p>This layer reads from the <code>ContextProvider</code> of its parent <code>Chain</code>.</p> When called, it will <ul> <li>Retrieve a value from the context using the given key</li> <li>Transform the value with the given function (optional)</li> <li>Return the value</li> </ul> Source code in <code>src/refiners/fluxion/layers/chain.py</code> <pre><code>def __init__(self, context: str, key: str) -> None:\n super().__init__()\n self.context = context\n self.key = key\n self.func: Callable[[Any], Any] = lambda x: x\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.WeightedModule","title":"WeightedModule","text":"<pre><code>WeightedModule(*args: Any, **kwargs: Any)\n</code></pre> <p> Bases: <code>Module</code></p> <p>A module with a weight (Tensor) attribute.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def __init__(self, *args: Any, **kwargs: Any) -> None:\n super().__init__(*args, *kwargs) # type: ignore[reportUnknownMemberType]\n</code></pre>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.WeightedModule.device","title":"device <code>property</code>","text":"<pre><code>device: device\n</code></pre> <p>Return the device of the module's weight.</p>"},{"location":"reference/fluxion/layers/#refiners.fluxion.layers.WeightedModule.dtype","title":"dtype <code>property</code>","text":"<pre><code>dtype: dtype\n</code></pre> <p>Return the dtype of the module's weight.</p>"},{"location":"reference/fluxion/utils/","title":"<code class=\"doc-symbol doc-symbol-nav doc-symbol-module\"></code> Utils","text":""},{"location":"reference/fluxion/utils/#refiners.fluxion.utils.image_to_tensor","title":"image_to_tensor","text":"<pre><code>image_to_tensor(\n image: Image,\n device: device | str | None = None,\n dtype: dtype | None = None,\n) -> Tensor\n</code></pre> <p>Convert a PIL Image to a Tensor.</p> <p>Parameters:</p> Name Type Description Default <code>image</code> <code>Image</code> <p>The image to convert.</p> required <code>device</code> <code>device | str | None</code> <p>The device to use for the tensor.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The dtype to use for the tensor.</p> <code>None</code> <p>Returns:</p> Type Description <code>Tensor</code> <p>The converted tensor.</p> Note <p>If the image is in mode <code>RGB</code> the tensor will have shape <code>[3, H, W]</code>, otherwise <code>[1, H, W]</code> for mode <code>L</code> (grayscale) or <code>[4, H, W]</code> for mode <code>RGBA</code>.</p> <p>Values are normalized to the range <code>[0, 1]</code>.</p> Source code in <code>src/refiners/fluxion/utils.py</code> <pre><code>def image_to_tensor(image: Image.Image, device: Device | str | None = None, dtype: DType | None = None) -> Tensor:\n \"\"\"Convert a PIL Image to a Tensor.\n\n Args:\n image: The image to convert.\n device: The device to use for the tensor.\n dtype: The dtype to use for the tensor.\n\n Returns:\n The converted tensor.\n\n Note:\n If the image is in mode `RGB` the tensor will have shape `[3, H, W]`,\n otherwise `[1, H, W]` for mode `L` (grayscale) or `[4, H, W]` for mode `RGBA`.\n\n Values are normalized to the range `[0, 1]`.\n \"\"\"\n image_tensor = torch.tensor(array(image).astype(float32) / 255.0, device=device, dtype=dtype)\n\n assert isinstance(image.mode, str) # type: ignore\n match image.mode:\n case \"L\":\n image_tensor = image_tensor.unsqueeze(0)\n case \"RGBA\" | \"RGB\":\n image_tensor = image_tensor.permute(2, 0, 1)\n case _:\n raise ValueError(f\"Unsupported image mode: {image.mode}\")\n\n return image_tensor.unsqueeze(0)\n</code></pre>"},{"location":"reference/fluxion/utils/#refiners.fluxion.utils.load_from_safetensors","title":"load_from_safetensors","text":"<pre><code>load_from_safetensors(\n path: Path | str, device: device | str = \"cpu\"\n) -> dict[str, Tensor]\n</code></pre> <p>Load tensors from a SafeTensor file from disk.</p> <p>Parameters:</p> Name Type Description Default <code>path</code> <code>Path | str</code> <p>The path to the file.</p> required <code>device</code> <code>device | str</code> <p>The device to use for the tensors.</p> <code>'cpu'</code> <p>Returns:</p> Type Description <code>dict[str, Tensor]</code> <p>The loaded tensors.</p> Source code in <code>src/refiners/fluxion/utils.py</code> <pre><code>def load_from_safetensors(path: Path | str, device: Device | str = \"cpu\") -> dict[str, Tensor]:\n \"\"\"Load tensors from a SafeTensor file from disk.\n\n Args:\n path: The path to the file.\n device: The device to use for the tensors.\n\n Returns:\n The loaded tensors.\n \"\"\"\n return _load_file(path, str(device))\n</code></pre>"},{"location":"reference/fluxion/utils/#refiners.fluxion.utils.load_tensors","title":"load_tensors","text":"<pre><code>load_tensors(\n path: Path | str, /, device: device | str = \"cpu\"\n) -> dict[str, Tensor]\n</code></pre> <p>Load tensors from a file saved with <code>torch.save</code> from disk.</p> Note <p>This function uses the <code>weights_only</code> mode of <code>torch.load</code> for additional safety.</p> Warning <p>Still, only load data you trust and favor using <code>load_from_safetensors</code> instead.</p> Source code in <code>src/refiners/fluxion/utils.py</code> <pre><code>def load_tensors(path: Path | str, /, device: Device | str = \"cpu\") -> dict[str, Tensor]:\n \"\"\"Load tensors from a file saved with `torch.save` from disk.\n\n Note:\n This function uses the `weights_only` mode of `torch.load` for additional safety.\n\n Warning:\n Still, **only load data you trust** and favor using\n [`load_from_safetensors`][refiners.fluxion.utils.load_from_safetensors] instead.\n \"\"\"\n # see https://github.com/pytorch/pytorch/issues/97207#issuecomment-1494781560\n with warnings.catch_warnings():\n warnings.filterwarnings(\"ignore\", category=UserWarning, message=\"TypedStorage is deprecated\")\n tensors = torch.load(path, map_location=device, weights_only=True) # type: ignore\n\n assert isinstance(tensors, dict) and all(\n isinstance(key, str) and isinstance(value, Tensor)\n for key, value in tensors.items() # type: ignore\n ), \"Invalid tensor file, expected a dict[str, Tensor]\"\n\n return cast(dict[str, Tensor], tensors)\n</code></pre>"},{"location":"reference/fluxion/utils/#refiners.fluxion.utils.save_to_safetensors","title":"save_to_safetensors","text":"<pre><code>save_to_safetensors(\n path: Path | str,\n tensors: dict[str, Tensor],\n metadata: dict[str, str] | None = None,\n) -> None\n</code></pre> <p>Save tensors to a SafeTensor file on disk.</p> <p>Parameters:</p> Name Type Description Default <code>path</code> <code>Path | str</code> <p>The path to the file.</p> required <code>tensors</code> <code>dict[str, Tensor]</code> <p>The tensors to save.</p> required <code>metadata</code> <code>dict[str, str] | None</code> <p>The metadata to save.</p> <code>None</code> Source code in <code>src/refiners/fluxion/utils.py</code> <pre><code>def save_to_safetensors(path: Path | str, tensors: dict[str, Tensor], metadata: dict[str, str] | None = None) -> None:\n \"\"\"Save tensors to a SafeTensor file on disk.\n\n Args:\n path: The path to the file.\n tensors: The tensors to save.\n metadata: The metadata to save.\n \"\"\"\n _save_file(tensors, path, metadata) # type: ignore\n</code></pre>"},{"location":"reference/fluxion/utils/#refiners.fluxion.utils.str_to_dtype","title":"str_to_dtype","text":"<pre><code>str_to_dtype(dtype: str) -> dtype\n</code></pre> <p>Converts a string dtype to a torch.dtype.</p> <p>See also https://pytorch.org/docs/stable/tensor_attributes.html#torch-dtype</p> Source code in <code>src/refiners/fluxion/utils.py</code> <pre><code>def str_to_dtype(dtype: str) -> torch.dtype:\n \"\"\"Converts a string dtype to a torch.dtype.\n\n See also https://pytorch.org/docs/stable/tensor_attributes.html#torch-dtype\n \"\"\"\n match dtype.lower():\n case \"float32\" | \"float\":\n return torch.float32\n case \"float64\" | \"double\":\n return torch.float64\n case \"complex64\" | \"cfloat\":\n return torch.complex64\n case \"complex128\" | \"cdouble\":\n return torch.complex128\n case \"float16\" | \"half\":\n return torch.float16\n case \"bfloat16\":\n return torch.bfloat16\n case \"uint8\":\n return torch.uint8\n case \"int8\":\n return torch.int8\n case \"int16\" | \"short\":\n return torch.int16\n case \"int32\" | \"int\":\n return torch.int32\n case \"int64\" | \"long\":\n return torch.int64\n case \"bool\":\n return torch.bool\n case _:\n raise ValueError(f\"Unknown dtype: {dtype}\")\n</code></pre>"},{"location":"reference/fluxion/utils/#refiners.fluxion.utils.summarize_tensor","title":"summarize_tensor","text":"<pre><code>summarize_tensor(tensor: Tensor) -> str\n</code></pre> <p>Summarize a tensor.</p> <p>This helper function prints the shape, dtype, device, min, max, mean, std, norm and grad of a tensor.</p> <p>Parameters:</p> Name Type Description Default <code>tensor</code> <code>Tensor</code> <p>The tensor to summarize.</p> required <p>Returns:</p> Type Description <code>str</code> <p>The summary string.</p> Source code in <code>src/refiners/fluxion/utils.py</code> <pre><code>def summarize_tensor(tensor: torch.Tensor, /) -> str:\n \"\"\"Summarize a tensor.\n\n This helper function prints the shape, dtype, device, min, max, mean, std, norm and grad of a tensor.\n\n Args:\n tensor: The tensor to summarize.\n\n Returns:\n The summary string.\n \"\"\"\n info_list = [\n f\"shape=({', '.join(map(str, tensor.shape))})\",\n f\"dtype={str(object=tensor.dtype).removeprefix('torch.')}\",\n f\"device={tensor.device}\",\n ]\n if tensor.is_complex():\n tensor_f = tensor.real.float()\n else:\n if tensor.numel() > 0:\n info_list.extend(\n [\n f\"min={tensor.min():.2f}\", # type: ignore\n f\"max={tensor.max():.2f}\", # type: ignore\n ]\n )\n tensor_f = tensor.float()\n\n info_list.extend(\n [\n f\"mean={tensor_f.mean():.2f}\",\n f\"std={tensor_f.std():.2f}\",\n f\"norm={norm(x=tensor_f):.2f}\",\n f\"grad={tensor.requires_grad}\",\n ]\n )\n\n return \"Tensor(\" + \", \".join(info_list) + \")\"\n</code></pre>"},{"location":"reference/fluxion/utils/#refiners.fluxion.utils.tensor_to_image","title":"tensor_to_image","text":"<pre><code>tensor_to_image(tensor: Tensor) -> Image\n</code></pre> <p>Convert a Tensor to a PIL Image.</p> <p>Parameters:</p> Name Type Description Default <code>tensor</code> <code>Tensor</code> <p>The tensor to convert.</p> required <p>Returns:</p> Type Description <code>Image</code> <p>The converted image.</p> Note <p>The tensor must have shape <code>[1, channels, height, width]</code> where the number of channels is either 1 (grayscale) or 3 (RGB) or 4 (RGBA).</p> <p>Expected values are in the range <code>[0, 1]</code> and are clamped to this range.</p> Source code in <code>src/refiners/fluxion/utils.py</code> <pre><code>def tensor_to_image(tensor: Tensor) -> Image.Image:\n \"\"\"Convert a Tensor to a PIL Image.\n\n Args:\n tensor: The tensor to convert.\n\n Returns:\n The converted image.\n\n Note:\n The tensor must have shape `[1, channels, height, width]` where the number of\n channels is either 1 (grayscale) or 3 (RGB) or 4 (RGBA).\n\n Expected values are in the range `[0, 1]` and are clamped to this range.\n \"\"\"\n assert tensor.ndim == 4 and tensor.shape[0] == 1, f\"Unsupported tensor shape: {tensor.shape}\"\n num_channels = tensor.shape[1]\n tensor = tensor.clamp(0, 1).squeeze(0)\n tensor = tensor.to(torch.float32) # to avoid numpy error with bfloat16\n\n match num_channels:\n case 1:\n tensor = tensor.squeeze(0)\n case 3 | 4:\n tensor = tensor.permute(1, 2, 0)\n case _:\n raise ValueError(f\"Unsupported number of channels: {num_channels}\")\n\n return Image.fromarray((tensor.cpu().numpy() * 255).astype(\"uint8\")) # type: ignore[reportUnknownType]\n</code></pre>"},{"location":"reference/foundationals/clip/","title":"<code class=\"doc-symbol doc-symbol-nav doc-symbol-module\"></code> CLIP","text":""},{"location":"reference/foundationals/clip/#refiners.foundationals.clip.CLIPImageEncoder","title":"CLIPImageEncoder","text":"<pre><code>CLIPImageEncoder(\n image_size: int = 224,\n embedding_dim: int = 768,\n output_dim: int = 512,\n patch_size: int = 32,\n num_layers: int = 12,\n num_attention_heads: int = 12,\n feedforward_dim: int = 3072,\n layer_norm_eps: float = 1e-05,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Contrastive Language-Image Pretraining (CLIP) image encoder.</p> <p>See [arXiv:2103.00020] Learning Transferable Visual Models From Natural Language Supervision for more details.</p> <p>Parameters:</p> Name Type Description Default <code>image_size</code> <code>int</code> <p>The size of the input image.</p> <code>224</code> <code>embedding_dim</code> <code>int</code> <p>The dimension of the embedding.</p> <code>768</code> <code>output_dim</code> <code>int</code> <p>The dimension of the output.</p> <code>512</code> <code>patch_size</code> <code>int</code> <p>The size of the patches.</p> <code>32</code> <code>num_layers</code> <code>int</code> <p>The number of layers.</p> <code>12</code> <code>num_attention_heads</code> <code>int</code> <p>The number of attention heads.</p> <code>12</code> <code>feedforward_dim</code> <code>int</code> <p>The dimension of the feedforward layer.</p> <code>3072</code> <code>layer_norm_eps</code> <code>float</code> <p>The epsilon value for normalization.</p> <code>1e-05</code> <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/clip/image_encoder.py</code> <pre><code>def __init__(\n self,\n image_size: int = 224,\n embedding_dim: int = 768,\n output_dim: int = 512,\n patch_size: int = 32,\n num_layers: int = 12,\n num_attention_heads: int = 12,\n feedforward_dim: int = 3072,\n layer_norm_eps: float = 1e-5,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize a CLIP image encoder.\n\n Args:\n image_size: The size of the input image.\n embedding_dim: The dimension of the embedding.\n output_dim: The dimension of the output.\n patch_size: The size of the patches.\n num_layers: The number of layers.\n num_attention_heads: The number of attention heads.\n feedforward_dim: The dimension of the feedforward layer.\n layer_norm_eps: The epsilon value for normalization.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n self.image_size = image_size\n self.embedding_dim = embedding_dim\n self.output_dim = output_dim\n self.patch_size = patch_size\n self.num_layers = num_layers\n self.num_attention_heads = num_attention_heads\n self.feedforward_dim = feedforward_dim\n cls_token_pooling: Callable[[Tensor], Tensor] = lambda x: x[:, 0, :]\n super().__init__(\n ViTEmbeddings(\n image_size=image_size, embedding_dim=embedding_dim, patch_size=patch_size, device=device, dtype=dtype\n ),\n fl.LayerNorm(normalized_shape=embedding_dim, eps=layer_norm_eps, device=device, dtype=dtype),\n fl.Chain(\n TransformerLayer(\n embedding_dim=embedding_dim,\n feedforward_dim=feedforward_dim,\n num_attention_heads=num_attention_heads,\n layer_norm_eps=layer_norm_eps,\n device=device,\n dtype=dtype,\n )\n for _ in range(num_layers)\n ),\n fl.Lambda(func=cls_token_pooling),\n fl.LayerNorm(normalized_shape=embedding_dim, eps=layer_norm_eps, device=device, dtype=dtype),\n fl.Linear(in_features=embedding_dim, out_features=output_dim, bias=False, device=device, dtype=dtype),\n )\n</code></pre>"},{"location":"reference/foundationals/clip/#refiners.foundationals.clip.CLIPImageEncoderG","title":"CLIPImageEncoderG","text":"<pre><code>CLIPImageEncoderG(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>CLIPImageEncoder</code></p> <p>CLIP giant image encoder.</p> <p>See [arXiv:2103.00020] Learning Transferable Visual Models From Natural Language Supervision for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>1664</p> <code>output_dim</code> <code>int</code> <p>1280</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>num_layers</code> <code>int</code> <p>48</p> <code>num_attention_heads</code> <code>int</code> <p>16</p> <code>feedforward_dim</code> <code>int</code> <p>8192</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/clip/image_encoder.py</code> <pre><code>def __init__(self, device: Device | str | None = None, dtype: DType | None = None) -> None:\n \"\"\"Initialize CLIP giant image encoder.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=1664,\n output_dim=1280,\n patch_size=14,\n num_layers=48,\n num_attention_heads=16,\n feedforward_dim=8192,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/clip/#refiners.foundationals.clip.CLIPImageEncoderH","title":"CLIPImageEncoderH","text":"<pre><code>CLIPImageEncoderH(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>CLIPImageEncoder</code></p> <p>CLIP huge image encoder.</p> <p>See [arXiv:2103.00020] Learning Transferable Visual Models From Natural Language Supervision for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>1280</p> <code>output_dim</code> <code>int</code> <p>1024</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>num_layers</code> <code>int</code> <p>32</p> <code>num_attention_heads</code> <code>int</code> <p>16</p> <code>feedforward_dim</code> <code>int</code> <p>5120</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/clip/image_encoder.py</code> <pre><code>def __init__(self, device: Device | str | None = None, dtype: DType | None = None) -> None:\n \"\"\"Initialize CLIP huge image encoder.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=1280,\n output_dim=1024,\n patch_size=14,\n num_layers=32,\n num_attention_heads=16,\n feedforward_dim=5120,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/clip/#refiners.foundationals.clip.CLIPTextEncoder","title":"CLIPTextEncoder","text":"<pre><code>CLIPTextEncoder(\n embedding_dim: int = 768,\n max_sequence_length: int = 77,\n vocabulary_size: int = 49408,\n num_layers: int = 12,\n num_attention_heads: int = 12,\n feedforward_dim: int = 3072,\n layer_norm_eps: float = 1e-05,\n use_quick_gelu: bool = False,\n tokenizer: CLIPTokenizer | None = None,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Contrastive Language-Image Pretraining (CLIP) text encoder.</p> <p>See [arXiv:2103.00020] Learning Transferable Visual Models From Natural Language Supervision for more details.</p> <p>Parameters:</p> Name Type Description Default <code>embedding_dim</code> <code>int</code> <p>The embedding dimension.</p> <code>768</code> <code>max_sequence_length</code> <code>int</code> <p>The maximum sequence length.</p> <code>77</code> <code>vocabulary_size</code> <code>int</code> <p>The vocabulary size.</p> <code>49408</code> <code>num_layers</code> <code>int</code> <p>The number of layers.</p> <code>12</code> <code>num_attention_heads</code> <code>int</code> <p>The number of attention heads.</p> <code>12</code> <code>feedforward_dim</code> <code>int</code> <p>The feedforward dimension.</p> <code>3072</code> <code>layer_norm_eps</code> <code>float</code> <p>The epsilon value for layer normalization.</p> <code>1e-05</code> <code>use_quick_gelu</code> <code>bool</code> <p>Whether to use the quick GeLU activation function.</p> <code>False</code> <code>tokenizer</code> <code>CLIPTokenizer | None</code> <p>The tokenizer.</p> <code>None</code> <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/clip/text_encoder.py</code> <pre><code>def __init__(\n self,\n embedding_dim: int = 768,\n max_sequence_length: int = 77,\n vocabulary_size: int = 49408,\n num_layers: int = 12,\n num_attention_heads: int = 12,\n feedforward_dim: int = 3072,\n layer_norm_eps: float = 1e-5,\n use_quick_gelu: bool = False,\n tokenizer: CLIPTokenizer | None = None,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize CLIP text encoder.\n\n Args:\n embedding_dim: The embedding dimension.\n max_sequence_length: The maximum sequence length.\n vocabulary_size: The vocabulary size.\n num_layers: The number of layers.\n num_attention_heads: The number of attention heads.\n feedforward_dim: The feedforward dimension.\n layer_norm_eps: The epsilon value for layer normalization.\n use_quick_gelu: Whether to use the quick GeLU activation function.\n tokenizer: The tokenizer.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n self.embedding_dim = embedding_dim\n self.max_sequence_length = max_sequence_length\n self.vocabulary_size = vocabulary_size\n self.num_layers = num_layers\n self.num_attention_heads = num_attention_heads\n self.feedforward_dim = feedforward_dim\n self.layer_norm_eps = layer_norm_eps\n self.use_quick_gelu = use_quick_gelu\n super().__init__(\n tokenizer or CLIPTokenizer(sequence_length=max_sequence_length),\n fl.Converter(set_dtype=False),\n fl.Sum(\n TokenEncoder(\n vocabulary_size=vocabulary_size,\n embedding_dim=embedding_dim,\n device=device,\n dtype=dtype,\n ),\n PositionalEncoder(\n max_sequence_length=max_sequence_length,\n embedding_dim=embedding_dim,\n device=device,\n dtype=dtype,\n ),\n ),\n *(\n TransformerLayer(\n embedding_dim=embedding_dim,\n num_attention_heads=num_attention_heads,\n feedforward_dim=feedforward_dim,\n layer_norm_eps=layer_norm_eps,\n device=device,\n dtype=dtype,\n )\n for _ in range(num_layers)\n ),\n fl.LayerNorm(normalized_shape=embedding_dim, eps=layer_norm_eps, device=device, dtype=dtype),\n )\n if use_quick_gelu:\n for gelu, parent in self.walk(predicate=lambda m, _: isinstance(m, fl.GeLU)):\n parent.replace(\n old_module=gelu,\n new_module=fl.GeLU(approximation=fl.GeLUApproximation.SIGMOID),\n )\n</code></pre>"},{"location":"reference/foundationals/clip/#refiners.foundationals.clip.CLIPTextEncoderG","title":"CLIPTextEncoderG","text":"<pre><code>CLIPTextEncoderG(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>CLIPTextEncoder</code></p> <p>CLIP giant text encoder.</p> <p>See [arXiv:2103.00020] Learning Transferable Visual Models From Natural Language Supervision for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>1280</p> <code>num_layers</code> <code>int</code> <p>32</p> <code>num_attention_heads</code> <code>int</code> <p>20</p> <code>feedforward_dim</code> <code>int</code> <p>5120</p> <code>tokenizer</code> <code>CLIPTokenizer</code> <p>CLIPTokenizer(pad_token_id=0)</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/clip/text_encoder.py</code> <pre><code>def __init__(self, device: Device | str | None = None, dtype: DType | None = None) -> None:\n \"\"\"Initialize CLIP giant text encoder.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n tokenizer = CLIPTokenizer(pad_token_id=0)\n super().__init__(\n embedding_dim=1280,\n num_layers=32,\n num_attention_heads=20,\n feedforward_dim=5120,\n tokenizer=tokenizer,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/clip/#refiners.foundationals.clip.CLIPTextEncoderH","title":"CLIPTextEncoderH","text":"<pre><code>CLIPTextEncoderH(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>CLIPTextEncoder</code></p> <p>CLIP huge text encoder.</p> <p>See [arXiv:2103.00020] Learning Transferable Visual Models From Natural Language Supervision for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>1024</p> <code>num_layers</code> <code>int</code> <p>23</p> <code>num_attention_heads</code> <code>int</code> <p>16</p> <code>feedforward_dim</code> <code>int</code> <p>4096</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/clip/text_encoder.py</code> <pre><code>def __init__(self, device: Device | str | None = None, dtype: DType | None = None) -> None:\n \"\"\"Initialize CLIP huge text encoder.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=1024,\n num_layers=23,\n num_attention_heads=16,\n feedforward_dim=4096,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/clip/#refiners.foundationals.clip.CLIPTextEncoderL","title":"CLIPTextEncoderL","text":"<pre><code>CLIPTextEncoderL(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>CLIPTextEncoder</code></p> <p>CLIP large text encoder.</p> Note <p>We replace the GeLU activation function with an approximate GeLU to comply with the original CLIP implementation of OpenAI (https://github.com/openai/CLIP/blob/a1d0717/clip/model.py#L166)</p> <p>See [arXiv:2103.00020] Learning Transferable Visual Models From Natural Language Supervision for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>768</p> <code>num_layers</code> <code>int</code> <p>12</p> <code>num_attention_heads</code> <code>int</code> <p>12</p> <code>feedforward_dim</code> <code>int</code> <p>3072</p> <code>use_quick_gelu</code> <code>bool</code> <p>True</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/clip/text_encoder.py</code> <pre><code>def __init__(self, device: Device | str | None = None, dtype: DType | None = None) -> None:\n \"\"\"Initialize CLIP large text encoder.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=768,\n num_layers=12,\n num_attention_heads=12,\n feedforward_dim=3072,\n use_quick_gelu=True,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/dinov2/","title":"<code class=\"doc-symbol doc-symbol-nav doc-symbol-module\"></code> DINOv2","text":""},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.DINOv2_base","title":"DINOv2_base","text":"<pre><code>DINOv2_base(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>ViT</code></p> <p>DINOv2 base model.</p> <p>See [arXiv:2304.07193] DINOv2: Learning Robust Visual Features without Supervision for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>768</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>image_size</code> <code>int</code> <p>518</p> <code>num_layers</code> <code>int</code> <p>12</p> <code>num_heads</code> <code>int</code> <p>12</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/dinov2/dinov2.py</code> <pre><code>def __init__(\n self,\n device: torch.device | str | None = None,\n dtype: torch.dtype | None = None,\n) -> None:\n \"\"\"Initialize DINOv2 base model.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=768,\n patch_size=14,\n image_size=518,\n num_layers=12,\n num_heads=12,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.DINOv2_base_reg","title":"DINOv2_base_reg","text":"<pre><code>DINOv2_base_reg(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>ViT</code></p> <p>DINOv2 base model with register.</p> <p>See [arXiv:2304.07193] DINOv2: Learning Robust Visual Features without Supervision and [arXiv:2309.16588] Vision Transformers Need Registers for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>768</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>image_size</code> <code>int</code> <p>518</p> <code>num_layers</code> <code>int</code> <p>12</p> <code>num_heads</code> <code>int</code> <p>12</p> <code>num_registers</code> <code>int</code> <p>4</p> <code>interpolate_antialias</code> <code>bool</code> <p>True</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/dinov2/dinov2.py</code> <pre><code>def __init__(\n self,\n device: torch.device | str | None = None,\n dtype: torch.dtype | None = None,\n) -> None:\n \"\"\"Initialize DINOv2 base model with register.\n\n Args:\n device (torch.device | str | None): The PyTorch device to use.\n dtype (torch.dtype | None): The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=768,\n patch_size=14,\n image_size=518,\n num_layers=12,\n num_heads=12,\n num_registers=4,\n interpolate_antialias=True,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.DINOv2_giant","title":"DINOv2_giant","text":"<pre><code>DINOv2_giant(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>ViT</code></p> <p>DINOv2 giant model.</p> <p>See [arXiv:2304.07193] DINOv2: Learning Robust Visual Features without Supervision for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>1536</p> <code>feedforward_dim</code> <code>int</code> <p>4096</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>image_size</code> <code>int</code> <p>518</p> <code>num_layers</code> <code>int</code> <p>40</p> <code>num_heads</code> <code>int</code> <p>24</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/dinov2/dinov2.py</code> <pre><code>def __init__(\n self,\n device: torch.device | str | None = None,\n dtype: torch.dtype | None = None,\n) -> None:\n \"\"\"Initialize DINOv2 giant model.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=1536,\n feedforward_dim=4096,\n patch_size=14,\n image_size=518,\n num_layers=40,\n num_heads=24,\n activation=GLU(SiLU()),\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.DINOv2_giant_reg","title":"DINOv2_giant_reg","text":"<pre><code>DINOv2_giant_reg(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>ViT</code></p> <p>DINOv2 giant model with register.</p> <p>See [arXiv:2304.07193] DINOv2: Learning Robust Visual Features without Supervision and [arXiv:2309.16588] Vision Transformers Need Registers</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>1536</p> <code>feedforward_dim</code> <code>int</code> <p>4096</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>image_size</code> <code>int</code> <p>518</p> <code>num_layers</code> <code>int</code> <p>40</p> <code>num_heads</code> <code>int</code> <p>24</p> <code>num_registers</code> <code>int</code> <p>4</p> <code>interpolate_antialias</code> <code>bool</code> <p>True</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/dinov2/dinov2.py</code> <pre><code>def __init__(\n self,\n device: torch.device | str | None = None,\n dtype: torch.dtype | None = None,\n) -> None:\n \"\"\"Initialize DINOv2 giant model with register.\n\n Args:\n device (torch.device | str | None): The PyTorch device to use.\n dtype (torch.dtype | None): The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=1536,\n feedforward_dim=4096,\n patch_size=14,\n image_size=518,\n num_layers=40,\n num_heads=24,\n num_registers=4,\n interpolate_antialias=True,\n activation=GLU(SiLU()),\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.DINOv2_large","title":"DINOv2_large","text":"<pre><code>DINOv2_large(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>ViT</code></p> <p>DINOv2 large model.</p> <p>See [arXiv:2304.07193] DINOv2: Learning Robust Visual Features without Supervision for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>1024</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>image_size</code> <code>int</code> <p>518</p> <code>num_layers</code> <code>int</code> <p>24</p> <code>num_heads</code> <code>int</code> <p>16</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/dinov2/dinov2.py</code> <pre><code>def __init__(\n self,\n device: torch.device | str | None = None,\n dtype: torch.dtype | None = None,\n) -> None:\n \"\"\"Initialize DINOv2 large model.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=1024,\n patch_size=14,\n image_size=518,\n num_layers=24,\n num_heads=16,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.DINOv2_large_reg","title":"DINOv2_large_reg","text":"<pre><code>DINOv2_large_reg(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>ViT</code></p> <p>DINOv2 large model with register.</p> <p>See [arXiv:2304.07193] DINOv2: Learning Robust Visual Features without Supervision and [arXiv:2309.16588] Vision Transformers Need Registers for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>1024</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>image_size</code> <code>int</code> <p>518</p> <code>num_layers</code> <code>int</code> <p>24</p> <code>num_heads</code> <code>int</code> <p>16</p> <code>num_registers</code> <code>int</code> <p>4</p> <code>interpolate_antialias</code> <code>bool</code> <p>True</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/dinov2/dinov2.py</code> <pre><code>def __init__(\n self,\n device: torch.device | str | None = None,\n dtype: torch.dtype | None = None,\n) -> None:\n \"\"\"Initialize DINOv2 large model with register.\n\n Args:\n device (torch.device | str | None): The PyTorch device to use.\n dtype (torch.dtype | None): The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=1024,\n patch_size=14,\n image_size=518,\n num_layers=24,\n num_heads=16,\n num_registers=4,\n interpolate_antialias=True,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.DINOv2_small","title":"DINOv2_small","text":"<pre><code>DINOv2_small(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>ViT</code></p> <p>DINOv2 small model.</p> <p>See [arXiv:2304.07193] DINOv2: Learning Robust Visual Features without Supervision for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>384</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>image_size</code> <code>int</code> <p>518</p> <code>num_layers</code> <code>int</code> <p>12</p> <code>num_heads</code> <code>int</code> <p>6</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/dinov2/dinov2.py</code> <pre><code>def __init__(\n self,\n device: torch.device | str | None = None,\n dtype: torch.dtype | None = None,\n) -> None:\n \"\"\"Initialize DINOv2 small model.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=384,\n patch_size=14,\n image_size=518,\n num_layers=12,\n num_heads=6,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.DINOv2_small_reg","title":"DINOv2_small_reg","text":"<pre><code>DINOv2_small_reg(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>ViT</code></p> <p>DINOv2 small model with register.</p> <p>See [arXiv:2304.07193] DINOv2: Learning Robust Visual Features without Supervision and [arXiv:2309.16588] Vision Transformers Need Registers for more details.</p> <p>Attributes:</p> Name Type Description <code>embedding_dim</code> <code>int</code> <p>384</p> <code>patch_size</code> <code>int</code> <p>14</p> <code>image_size</code> <code>int</code> <p>518</p> <code>num_layers</code> <code>int</code> <p>12</p> <code>num_heads</code> <code>int</code> <p>6</p> <code>num_registers</code> <code>int</code> <p>4</p> <code>interpolate_antialias</code> <code>bool</code> <p>True</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/dinov2/dinov2.py</code> <pre><code>def __init__(\n self,\n device: torch.device | str | None = None,\n dtype: torch.dtype | None = None,\n) -> None:\n \"\"\"Initialize DINOv2 small model with register.\n\n Args:\n device (torch.device | str | None): The PyTorch device to use.\n dtype (torch.dtype | None): The PyTorch data type to use.\n \"\"\"\n super().__init__(\n embedding_dim=384,\n patch_size=14,\n image_size=518,\n num_layers=12,\n num_heads=6,\n num_registers=4,\n interpolate_antialias=True,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.ViT","title":"ViT","text":"<pre><code>ViT(\n embedding_dim: int = 768,\n patch_size: int = 16,\n image_size: int = 224,\n num_layers: int = 12,\n num_heads: int = 12,\n norm_eps: float = 1e-06,\n mlp_ratio: int = 4,\n num_registers: int = 0,\n activation: Activation = GeLU(),\n feedforward_dim: int | None = None,\n interpolate_antialias: bool = False,\n interpolate_mode: str = \"bicubic\",\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Vision Transformer (ViT) model.</p> <p>See [arXiv:2010.11929] An Image is Worth 16x16 Words: Transformers for Image Recognition at Scale for more details.</p> <p>Parameters:</p> Name Type Description Default <code>embedding_dim</code> <code>int</code> <p>The dimension of the embedding.</p> <code>768</code> <code>patch_size</code> <code>int</code> <p>The size of the patches.</p> <code>16</code> <code>image_size</code> <code>int</code> <p>The size of the input image.</p> <code>224</code> <code>num_layers</code> <code>int</code> <p>The number of layers.</p> <code>12</code> <code>num_heads</code> <code>int</code> <p>The number of heads.</p> <code>12</code> <code>norm_eps</code> <code>float</code> <p>The epsilon value for normalization.</p> <code>1e-06</code> <code>mlp_ratio</code> <code>int</code> <p>The ratio for the multi-layer perceptron (MLP).</p> <code>4</code> <code>num_registers</code> <code>int</code> <p>The number of registers.</p> <code>0</code> <code>activation</code> <code>Activation</code> <p>The activation function.</p> <code>GeLU()</code> <code>feedforward_dim</code> <code>int | None</code> <p>The dimension of the feedforward layer.</p> <code>None</code> <code>interpolate_antialias</code> <code>bool</code> <p>Whether to use antialiasing for interpolation.</p> <code>False</code> <code>interpolate_mode</code> <code>str</code> <p>The interpolation mode.</p> <code>'bicubic'</code> <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/dinov2/vit.py</code> <pre><code>def __init__(\n self,\n embedding_dim: int = 768,\n patch_size: int = 16,\n image_size: int = 224,\n num_layers: int = 12,\n num_heads: int = 12,\n norm_eps: float = 1e-6,\n mlp_ratio: int = 4,\n num_registers: int = 0,\n activation: Activation = fl.GeLU(),\n feedforward_dim: int | None = None,\n interpolate_antialias: bool = False,\n interpolate_mode: str = \"bicubic\",\n device: torch.device | str | None = None,\n dtype: torch.dtype | None = None,\n) -> None:\n \"\"\"Initialize a Vision Transformer (ViT) model.\n\n Args:\n embedding_dim: The dimension of the embedding.\n patch_size: The size of the patches.\n image_size: The size of the input image.\n num_layers: The number of layers.\n num_heads: The number of heads.\n norm_eps: The epsilon value for normalization.\n mlp_ratio: The ratio for the multi-layer perceptron (MLP).\n num_registers: The number of registers.\n activation: The activation function.\n feedforward_dim: The dimension of the feedforward layer.\n interpolate_antialias: Whether to use antialiasing for interpolation.\n interpolate_mode: The interpolation mode.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n num_patches = image_size // patch_size\n self.embedding_dim = embedding_dim\n self.patch_size = patch_size\n self.image_size = image_size\n self.num_layers = num_layers\n self.num_heads = num_heads\n self.norm_eps = norm_eps\n self.mlp_ratio = mlp_ratio\n self.num_registers = num_registers\n self.feedforward_dim = feedforward_dim\n\n super().__init__(\n fl.Concatenate(\n ClassToken(\n embedding_dim=embedding_dim,\n device=device,\n dtype=dtype,\n ),\n PatchEncoder(\n in_channels=3,\n out_channels=embedding_dim,\n patch_size=patch_size,\n device=device,\n dtype=dtype,\n ),\n dim=1,\n ),\n PositionalEncoder(\n PositionalEmbedding(\n sequence_length=num_patches**2 + 1,\n embedding_dim=embedding_dim,\n patch_size=patch_size,\n device=device,\n dtype=dtype,\n ),\n fl.Chain(\n fl.Parallel(\n fl.Identity(),\n fl.UseContext(context=\"dinov2_vit\", key=\"input\"),\n ),\n InterpolateEmbedding(\n mode=interpolate_mode,\n antialias=interpolate_antialias,\n patch_size=patch_size,\n ),\n ),\n ),\n Transformer(\n TransformerLayer(\n embedding_dim=embedding_dim,\n feedforward_dim=feedforward_dim,\n activation=activation,\n num_heads=num_heads,\n mlp_ratio=mlp_ratio,\n norm_eps=norm_eps,\n device=device,\n dtype=dtype,\n )\n for _ in range(num_layers)\n ),\n fl.LayerNorm(\n normalized_shape=embedding_dim,\n eps=norm_eps,\n device=device,\n dtype=dtype,\n ),\n )\n\n if self.num_registers > 0:\n registers = Registers(\n num_registers=num_registers,\n embedding_dim=embedding_dim,\n device=device,\n dtype=dtype,\n )\n self.insert_before_type(Transformer, registers)\n</code></pre>"},{"location":"reference/foundationals/dinov2/#refiners.foundationals.dinov2.preprocess","title":"preprocess","text":"<pre><code>preprocess(img: Image, dim: int = 224) -> Tensor\n</code></pre> <p>Preprocess an image for use with DINOv2. Uses ImageNet mean and standard deviation. Note that this only resizes and normalizes the image, there is no center crop.</p> <p>Parameters:</p> Name Type Description Default <code>img</code> <code>Image</code> <p>The image.</p> required <code>dim</code> <code>int</code> <p>The square dimension to resize the image. Typically 224 or 518.</p> <code>224</code> <p>Returns:</p> Type Description <code>Tensor</code> <p>A float32 tensor with shape (3, dim, dim).</p> Source code in <code>src/refiners/foundationals/dinov2/dinov2.py</code> <pre><code>def preprocess(img: Image.Image, dim: int = 224) -> torch.Tensor:\n \"\"\"\n Preprocess an image for use with DINOv2. Uses ImageNet mean and standard deviation.\n Note that this only resizes and normalizes the image, there is no center crop.\n\n Args:\n img: The image.\n dim: The square dimension to resize the image. Typically 224 or 518.\n\n Returns:\n A float32 tensor with shape (3, dim, dim).\n \"\"\"\n img = img.convert(\"RGB\").resize((dim, dim)) # type: ignore\n t = image_to_tensor(img).squeeze()\n return normalize(t, mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/","title":"<code class=\"doc-symbol doc-symbol-nav doc-symbol-module\"></code> Latent Diffusion","text":""},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.FixedGroupNorm","title":"FixedGroupNorm","text":"<pre><code>FixedGroupNorm(target: GroupNorm)\n</code></pre> <p> Bases: <code>Chain</code>, <code>Adapter[GroupNorm]</code></p> <p>Adapter for GroupNorm layers to fix the running mean and variance.</p> <p>This is useful when running tiled inference with a autoencoder to ensure that the statistics of the GroupNorm layers are consistent across tiles.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def __init__(self, target: fl.GroupNorm) -> None:\n self.mean = None\n self.var = None\n with self.setup_adapter(target):\n super().__init__(fl.Lambda(self.compute_group_norm))\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder","title":"LatentDiffusionAutoencoder","text":"<pre><code>LatentDiffusionAutoencoder(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Latent diffusion autoencoder model.</p> <p>Attributes:</p> Name Type Description <code>encoder_scale</code> <p>The encoder scale to use.</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def __init__(\n self,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initializes the model.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n Encoder(device=device, dtype=dtype),\n Decoder(device=device, dtype=dtype),\n )\n self._tile_size = None\n self._blending = None\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder.decode","title":"decode","text":"<pre><code>decode(x: Tensor) -> Tensor\n</code></pre> <p>Decode a latent tensor.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The latent to decode.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The decoded image tensor.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def decode(self, x: Tensor) -> Tensor:\n \"\"\"Decode a latent tensor.\n\n Args:\n x: The latent to decode.\n\n Returns:\n The decoded image tensor.\n \"\"\"\n decoder = self[1]\n x = decoder(x / self.encoder_scale)\n return x\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder.encode","title":"encode","text":"<pre><code>encode(x: Tensor) -> Tensor\n</code></pre> <p>Encode an image.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The image tensor to encode.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The encoded tensor.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def encode(self, x: Tensor) -> Tensor:\n \"\"\"Encode an image.\n\n Args:\n x: The image tensor to encode.\n\n Returns:\n The encoded tensor.\n \"\"\"\n encoder = self[0]\n x = self.encoder_scale * encoder(x)\n return x\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder.image_to_latents","title":"image_to_latents","text":"<pre><code>image_to_latents(image: Image) -> Tensor\n</code></pre> <p>Encode an image to latents.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def image_to_latents(self, image: Image.Image) -> Tensor:\n \"\"\"\n Encode an image to latents.\n \"\"\"\n return self.images_to_latents([image])\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder.images_to_latents","title":"images_to_latents","text":"<pre><code>images_to_latents(images: list[Image]) -> Tensor\n</code></pre> <p>Convert a list of images to latents.</p> <p>Parameters:</p> Name Type Description Default <code>images</code> <code>list[Image]</code> <p>The list of images to convert.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>A tensor containing the latents associated with the images.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def images_to_latents(self, images: list[Image.Image]) -> Tensor:\n \"\"\"Convert a list of images to latents.\n\n Args:\n images: The list of images to convert.\n\n Returns:\n A tensor containing the latents associated with the images.\n \"\"\"\n x = images_to_tensor(images, device=self.device, dtype=self.dtype)\n x = 2 * x - 1\n return self.encode(x)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder.latents_to_image","title":"latents_to_image","text":"<pre><code>latents_to_image(x: Tensor) -> Image\n</code></pre> <p>Decode latents to an image.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def latents_to_image(self, x: Tensor) -> Image.Image:\n \"\"\"\n Decode latents to an image.\n \"\"\"\n if x.shape[0] != 1:\n raise ValueError(f\"Expected batch size of 1, got {x.shape[0]}\")\n\n return self.latents_to_images(x)[0]\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder.latents_to_images","title":"latents_to_images","text":"<pre><code>latents_to_images(x: Tensor) -> list[Image]\n</code></pre> <p>Convert a tensor of latents to images.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The tensor of latents to convert.</p> required <p>Returns:</p> Type Description <code>list[Image]</code> <p>A list of images associated with the latents.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def latents_to_images(self, x: Tensor) -> list[Image.Image]:\n \"\"\"Convert a tensor of latents to images.\n\n Args:\n x: The tensor of latents to convert.\n\n Returns:\n A list of images associated with the latents.\n \"\"\"\n x = self.decode(x)\n x = (x + 1) / 2\n return tensor_to_images(x)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder.tiled_image_to_latents","title":"tiled_image_to_latents","text":"<pre><code>tiled_image_to_latents(image: Image) -> Tensor\n</code></pre> <p>Convert an image to latents with gradient blending to smooth tile edges.</p> <p>You need to activate the tiled inference context manager with the <code>tiled_inference</code> method to use this method.</p> <p>```python with lda.tiled_inference(sample_image, tile_size=(768, 1024)): latents = lda.tiled_image_to_latents(sample_image)</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def tiled_image_to_latents(self, image: Image.Image) -> Tensor:\n \"\"\"\n Convert an image to latents with gradient blending to smooth tile edges.\n\n You need to activate the tiled inference context manager with the `tiled_inference` method to use this method.\n\n ```python\n with lda.tiled_inference(sample_image, tile_size=(768, 1024)):\n latents = lda.tiled_image_to_latents(sample_image)\n \"\"\"\n if self._tile_size is None:\n raise ValueError(\"Tiled inference context manager not active. Use `tiled_inference` method to activate.\")\n\n assert self._tile_size is not None and self._blending is not None\n image_tensor = image_to_tensor(image, device=self.device, dtype=self.dtype)\n image_tensor = 2 * image_tensor - 1\n return self._tiled_encode(image_tensor, self._tile_size, self._blending)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder.tiled_inference","title":"tiled_inference","text":"<pre><code>tiled_inference(\n image: Image,\n tile_size: tuple[int, int] = (512, 512),\n blending: int = 64,\n) -> Generator[None, None, None]\n</code></pre> <p>Context manager for tiled inference operations to save VRAM for large images.</p> <p>This context manager sets up a consistent GroupNorm statistics for performing tiled operations on the autoencoder, including setting and resetting group norm statistics. This allow to make sure that the result is consistent across tiles by capturing the statistics of the GroupNorm layers on a downsampled version of the image.</p> <p>Be careful not to use the normal <code>image_to_latents</code> and <code>latents_to_image</code> methods while this context manager is active, as this will fail silently and run the operation without tiling.</p> <p>```python with lda.tiled_inference(sample_image, tile_size=(768, 1024), blending=32): latents = lda.tiled_image_to_latents(sample_image) decoded_image = lda.tiled_latents_to_image(latents)</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>@contextmanager\ndef tiled_inference(\n self, image: Image.Image, tile_size: tuple[int, int] = (512, 512), blending: int = 64\n) -> Generator[None, None, None]:\n \"\"\"\n Context manager for tiled inference operations to save VRAM for large images.\n\n This context manager sets up a consistent GroupNorm statistics for performing tiled operations on the\n autoencoder, including setting and resetting group norm statistics. This allow to make sure that the result is\n consistent across tiles by capturing the statistics of the GroupNorm layers on a downsampled version of the\n image.\n\n Be careful not to use the normal `image_to_latents` and `latents_to_image` methods while this context manager is\n active, as this will fail silently and run the operation without tiling.\n\n ```python\n with lda.tiled_inference(sample_image, tile_size=(768, 1024), blending=32):\n latents = lda.tiled_image_to_latents(sample_image)\n decoded_image = lda.tiled_latents_to_image(latents)\n \"\"\"\n try:\n self._blending = blending\n self._tile_size = _ImageSize(width=tile_size[0], height=tile_size[1])\n self._add_fixed_group_norm(image, inference_size=self._tile_size)\n yield\n finally:\n self._remove_fixed_group_norm()\n self._tile_size = None\n self._blending = None\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.auto_encoder.LatentDiffusionAutoencoder.tiled_latents_to_image","title":"tiled_latents_to_image","text":"<pre><code>tiled_latents_to_image(x: Tensor) -> Image\n</code></pre> <p>Convert latents to an image with gradient blending to smooth tile edges.</p> <p>You need to activate the tiled inference context manager with the <code>tiled_inference</code> method to use this method.</p> <p>```python with lda.tiled_inference(sample_image, tile_size=(768, 1024)): image = lda.tiled_latents_to_image(latents)</p> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def tiled_latents_to_image(self, x: Tensor) -> Image.Image:\n \"\"\"\n Convert latents to an image with gradient blending to smooth tile edges.\n\n You need to activate the tiled inference context manager with the `tiled_inference` method to use this method.\n\n ```python\n with lda.tiled_inference(sample_image, tile_size=(768, 1024)):\n image = lda.tiled_latents_to_image(latents)\n \"\"\"\n if self._tile_size is None:\n raise ValueError(\"Tiled inference context manager not active. Use `tiled_inference` method to activate.\")\n\n assert self._tile_size is not None and self._blending is not None\n result = self._tiled_decode(x, self._tile_size, self._blending)\n return tensor_to_image((result + 1) / 2)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.model.LatentDiffusionModel","title":"LatentDiffusionModel","text":"<pre><code>LatentDiffusionModel(\n unet: Chain,\n lda: LatentDiffusionAutoencoder,\n clip_text_encoder: Chain,\n solver: Solver,\n classifier_free_guidance: bool = True,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>Module</code>, <code>ABC</code></p> Source code in <code>src/refiners/foundationals/latent_diffusion/model.py</code> <pre><code>def __init__(\n self,\n unet: fl.Chain,\n lda: LatentDiffusionAutoencoder,\n clip_text_encoder: fl.Chain,\n solver: Solver,\n classifier_free_guidance: bool = True,\n device: Device | str = \"cpu\",\n dtype: DType = torch.float32,\n) -> None:\n super().__init__()\n self.device: Device = device if isinstance(device, Device) else Device(device=device)\n self.dtype = dtype\n self.unet = unet.to(device=self.device, dtype=self.dtype)\n self.lda = lda.to(device=self.device, dtype=self.dtype)\n self.clip_text_encoder = clip_text_encoder.to(device=self.device, dtype=self.dtype)\n self.solver = solver.to(device=self.device, dtype=self.dtype)\n self.classifier_free_guidance = classifier_free_guidance\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.model.LatentDiffusionModel.init_latents","title":"init_latents","text":"<pre><code>init_latents(\n size: tuple[int, int],\n init_image: Image | None = None,\n noise: Tensor | None = None,\n) -> Tensor\n</code></pre> <p>Initialize the latents for the diffusion process.</p> <p>Parameters:</p> Name Type Description Default <code>size</code> <code>tuple[int, int]</code> <p>The size of the latent (in pixel space).</p> required <code>init_image</code> <code>Image | None</code> <p>The image to use as initialization for the latents.</p> <code>None</code> <code>noise</code> <code>Tensor | None</code> <p>The noise to add to the latents.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/model.py</code> <pre><code>def init_latents(\n self,\n size: tuple[int, int],\n init_image: Image.Image | None = None,\n noise: Tensor | None = None,\n) -> Tensor:\n \"\"\"Initialize the latents for the diffusion process.\n\n Args:\n size: The size of the latent (in pixel space).\n init_image: The image to use as initialization for the latents.\n noise: The noise to add to the latents.\n \"\"\"\n height, width = size\n latent_height = height // 8\n latent_width = width // 8\n\n if noise is None:\n noise = LatentDiffusionModel.sample_noise(\n size=(1, 4, latent_height, latent_width),\n device=self.device,\n dtype=self.dtype,\n )\n\n assert list(noise.shape[2:]) == [\n latent_height,\n latent_width,\n ], f\"noise shape is not compatible: {noise.shape}, with size: {size}\"\n\n if init_image is None:\n latent = noise\n else:\n resized = init_image.resize(size=(width, height)) # type: ignore\n encoded_image = self.lda.image_to_latents(resized)\n latent = self.solver.add_noise(\n x=encoded_image,\n noise=noise,\n step=self.solver.first_inference_step,\n )\n\n return self.solver.scale_model_input(latent, step=-1)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.model.LatentDiffusionModel.sample_noise","title":"sample_noise <code>staticmethod</code>","text":"<pre><code>sample_noise(\n size: tuple[int, ...],\n device: device | None = None,\n dtype: dtype | None = None,\n offset_noise: float | None = None,\n) -> Tensor\n</code></pre> <p>Sample noise from a normal distribution with an optional offset.</p> <p>Parameters:</p> Name Type Description Default <code>size</code> <code>tuple[int, ...]</code> <p>The size of the noise tensor.</p> required <code>device</code> <code>device | None</code> <p>The device to put the noise tensor on.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The data type of the noise tensor.</p> <code>None</code> <code>offset_noise</code> <code>float | None</code> <p>The offset of the noise tensor. Useful at training time, see https://www.crosslabs.org/blog/diffusion-with-offset-noise.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/model.py</code> <pre><code>@staticmethod\ndef sample_noise(\n size: tuple[int, ...],\n device: Device | None = None,\n dtype: DType | None = None,\n offset_noise: float | None = None,\n) -> torch.Tensor:\n \"\"\"Sample noise from a normal distribution with an optional offset.\n\n Args:\n size: The size of the noise tensor.\n device: The device to put the noise tensor on.\n dtype: The data type of the noise tensor.\n offset_noise: The offset of the noise tensor.\n Useful at training time, see https://www.crosslabs.org/blog/diffusion-with-offset-noise.\n \"\"\"\n noise = torch.randn(size=size, device=device, dtype=dtype)\n if offset_noise is not None:\n noise += offset_noise * torch.randn(size=(size[0], size[1], 1, 1), device=device, dtype=dtype)\n return noise\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.model.LatentDiffusionModel.set_inference_steps","title":"set_inference_steps","text":"<pre><code>set_inference_steps(\n num_steps: int, first_step: int = 0\n) -> None\n</code></pre> <p>Set the steps of the diffusion process.</p> <p>Parameters:</p> Name Type Description Default <code>num_steps</code> <code>int</code> <p>The number of inference steps.</p> required <code>first_step</code> <code>int</code> <p>The first inference step, used for image-to-image diffusion. You may be used to setting a float in <code>[0, 1]</code> called <code>strength</code> instead, which is an abstraction for this. The first step is <code>round((1 - strength) * (num_steps - 1))</code>.</p> <code>0</code> Source code in <code>src/refiners/foundationals/latent_diffusion/model.py</code> <pre><code>def set_inference_steps(self, num_steps: int, first_step: int = 0) -> None:\n \"\"\"Set the steps of the diffusion process.\n\n Args:\n num_steps: The number of inference steps.\n first_step: The first inference step, used for image-to-image diffusion.\n You may be used to setting a float in `[0, 1]` called `strength` instead,\n which is an abstraction for this. The first step is\n `round((1 - strength) * (num_steps - 1))`.\n \"\"\"\n self.solver = self.solver.rebuild(num_inference_steps=num_steps, first_inference_step=first_step)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.ControlLora","title":"ControlLora","text":"<pre><code>ControlLora(\n name: str,\n unet: SDXLUNet,\n scale: float = 1.0,\n condition_channels: int = 3,\n)\n</code></pre> <p> Bases: <code>Passthrough</code></p> <p>ControlLora is a Half-UNet clone of the target UNet, patched with various <code>LoRA</code> layers, <code>ZeroConvolution</code> layers, and a <code>ConditionEncoder</code>.</p> <p>Like ControlNet, it injects residual tensors into the target UNet. See https://github.com/HighCWu/control-lora-v2 for more details.</p> <p>Gets context:</p> Type Description <code>Float[Tensor, 'batch condition_channels width height']</code> <p>The input image.</p> <p>Sets context:</p> Type Description <code>list[Tensor]</code> <p>The residuals to be added to the target UNet's residuals. (context=\"unet\", key=\"residuals\")</p> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the ControlLora.</p> required <code>unet</code> <code>SDXLUNet</code> <p>The target UNet.</p> required <code>scale</code> <code>float</code> <p>The scale to multiply the residuals by.</p> <code>1.0</code> <code>condition_channels</code> <code>int</code> <p>The number of channels of the input condition tensor.</p> <code>3</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/control_lora.py</code> <pre><code>def __init__(\n self,\n name: str,\n unet: SDXLUNet,\n scale: float = 1.0,\n condition_channels: int = 3,\n) -> None:\n \"\"\"Initialize the ControlLora.\n\n Args:\n name: The name of the ControlLora.\n unet: The target UNet.\n scale: The scale to multiply the residuals by.\n condition_channels: The number of channels of the input condition tensor.\n \"\"\"\n self.name = name\n\n super().__init__(\n timestep_encoder := unet.layer(\"TimestepEncoder\", Chain).structural_copy(),\n downblocks := unet.layer(\"DownBlocks\", Chain).structural_copy(),\n middle_block := unet.layer(\"MiddleBlock\", Chain).structural_copy(),\n )\n\n # modify the context_key of the copied TimestepEncoder to avoid conflicts\n timestep_encoder.context_key = f\"timestep_embedding_control_lora_{name}\"\n\n # modify the context_key of each RangeAdapter2d to avoid conflicts\n for range_adapter in self.layers(RangeAdapter2d):\n range_adapter.context_key = f\"timestep_embedding_control_lora_{name}\"\n\n # insert the ConditionEncoder in the first DownBlock\n first_downblock = downblocks.layer(0, Chain)\n out_channels = first_downblock.layer(0, Conv2d).out_channels\n first_downblock.append(\n Residual(\n UseContext(f\"control_lora_{name}\", f\"condition\"),\n ConditionEncoder(\n in_channels=condition_channels,\n out_channels=out_channels,\n device=unet.device,\n dtype=unet.dtype,\n ),\n )\n )\n\n # replace each ResidualAccumulator by a ZeroConvolution\n for residual_accumulator in self.layers(ResidualAccumulator):\n downblock = self.ensure_find_parent(residual_accumulator)\n\n first_layer = downblock[0]\n assert hasattr(first_layer, \"out_channels\"), f\"{first_layer} has no out_channels attribute\"\n\n block_channels = first_layer.out_channels\n assert isinstance(block_channels, int)\n\n downblock.replace(\n residual_accumulator,\n ZeroConvolution(\n scale=scale,\n residual_index=residual_accumulator.n,\n in_channels=block_channels,\n out_channels=block_channels,\n device=unet.device,\n dtype=unet.dtype,\n ),\n )\n\n # append a ZeroConvolution to middle_block\n middle_block_channels = middle_block.layer(0, ResidualBlock).out_channels\n middle_block.append(\n ZeroConvolution(\n scale=scale,\n residual_index=len(downblocks),\n in_channels=middle_block_channels,\n out_channels=middle_block_channels,\n device=unet.device,\n dtype=unet.dtype,\n )\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.ControlLora.scale","title":"scale <code>property</code> <code>writable</code>","text":"<pre><code>scale: float\n</code></pre> <p>The scale of the residuals stored in the context.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.ControlLoraAdapter","title":"ControlLoraAdapter","text":"<pre><code>ControlLoraAdapter(\n name: str,\n target: SDXLUNet,\n scale: float = 1.0,\n condition_channels: int = 3,\n weights: dict[str, Tensor] | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code>, <code>Adapter[SDXLUNet]</code></p> <p>Adapter for <code>ControlLora</code>.</p> <p>This adapter simply prepends a <code>ControlLora</code> model inside the target <code>SDXLUNet</code>.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/control_lora.py</code> <pre><code>def __init__(\n self,\n name: str,\n target: SDXLUNet,\n scale: float = 1.0,\n condition_channels: int = 3,\n weights: dict[str, Tensor] | None = None,\n) -> None:\n with self.setup_adapter(target):\n self.name = name\n self._control_lora = [\n ControlLora(\n name=name,\n unet=target,\n scale=scale,\n condition_channels=condition_channels,\n ),\n ]\n\n super().__init__(target)\n\n if weights:\n self.load_weights(weights)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.ControlLoraAdapter.control_lora","title":"control_lora <code>property</code>","text":"<pre><code>control_lora: ControlLora\n</code></pre> <p>The ControlLora model.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.ControlLoraAdapter.scale","title":"scale <code>property</code> <code>writable</code>","text":"<pre><code>scale: float\n</code></pre> <p>The scale of the injected residuals.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.ControlLoraAdapter.load_condition_encoder","title":"load_condition_encoder <code>staticmethod</code>","text":"<pre><code>load_condition_encoder(\n state_dict: dict[str, Tensor], control_lora: ControlLora\n)\n</code></pre> <p>Load the <code>ConditionEncoder</code>'s layers from the state_dict into the <code>ControlLora</code>.</p> <p>Parameters:</p> Name Type Description Default <code>state_dict</code> <code>dict[str, Tensor]</code> <p>The state_dict containing the ConditionEncoder layers to load.</p> required <code>control_lora</code> <code>ControlLora</code> <p>The ControlLora to load the ConditionEncoder layers into.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/control_lora.py</code> <pre><code>@staticmethod\ndef load_condition_encoder(\n state_dict: dict[str, Tensor],\n control_lora: ControlLora,\n):\n \"\"\"Load the `ConditionEncoder`'s layers from the state_dict into the `ControlLora`.\n\n Args:\n state_dict: The state_dict containing the ConditionEncoder layers to load.\n control_lora: The ControlLora to load the ConditionEncoder layers into.\n \"\"\"\n condition_encoder_layer = control_lora.ensure_find(ConditionEncoder)\n condition_encoder_state_dict = {\n key.removeprefix(\"ConditionEncoder.\"): value\n for key, value in state_dict.items()\n if \"ConditionEncoder\" in key\n }\n condition_encoder_layer.load_state_dict(condition_encoder_state_dict)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.ControlLoraAdapter.load_lora_layers","title":"load_lora_layers <code>staticmethod</code>","text":"<pre><code>load_lora_layers(\n name: str,\n state_dict: dict[str, Tensor],\n control_lora: ControlLora,\n) -> None\n</code></pre> <p>Load the <code>LoRA</code> layers from the state_dict into the <code>ControlLora</code>.</p> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the ControlLora.</p> required <code>state_dict</code> <code>dict[str, Tensor]</code> <p>The state_dict containing the LoRA layers to load.</p> required <code>control_lora</code> <code>ControlLora</code> <p>The ControlLora to load the LoRA layers into.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/control_lora.py</code> <pre><code>@staticmethod\ndef load_lora_layers(\n name: str,\n state_dict: dict[str, Tensor],\n control_lora: ControlLora,\n) -> None:\n \"\"\"Load the [`LoRA`][refiners.fluxion.adapters.lora.Lora] layers from the state_dict into the `ControlLora`.\n\n Args:\n name: The name of the ControlLora.\n state_dict: The state_dict containing the LoRA layers to load.\n control_lora: The ControlLora to load the LoRA layers into.\n \"\"\"\n # filter the LoraAdapters from the state_dict\n lora_weights = {\n key.removeprefix(\"ControlLora.\"): value for key, value in state_dict.items() if \"ControlLora\" in key\n }\n lora_weights = {f\"{key}.weight\": value for key, value in lora_weights.items()}\n\n # move the tensors to the device and dtype of the ControlLora\n lora_weights = {\n key: value.to(\n dtype=control_lora.dtype,\n device=control_lora.device,\n )\n for key, value in lora_weights.items()\n }\n\n # load every LoRA layers from the filtered state_dict\n loras = Lora.from_dict(name, state_dict=lora_weights)\n\n # attach the LoRA layers to the ControlLora\n adapters: list[LoraAdapter] = []\n for key, lora in loras.items():\n target = control_lora.layer(key.split(\".\"), WeightedModule)\n assert lora.is_compatible(target)\n adapter = LoraAdapter(target, lora)\n adapters.append(adapter)\n\n for adapter in adapters:\n adapter.inject(control_lora)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.ControlLoraAdapter.load_weights","title":"load_weights","text":"<pre><code>load_weights(state_dict: dict[str, Tensor]) -> None\n</code></pre> <p>Load the weights from the state_dict into the <code>ControlLora</code>.</p> <p>Parameters:</p> Name Type Description Default <code>state_dict</code> <code>dict[str, Tensor]</code> <p>The state_dict containing the weights to load.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/control_lora.py</code> <pre><code>def load_weights(\n self,\n state_dict: dict[str, Tensor],\n) -> None:\n \"\"\"Load the weights from the state_dict into the `ControlLora`.\n\n Args:\n state_dict: The state_dict containing the weights to load.\n \"\"\"\n ControlLoraAdapter.load_lora_layers(self.name, state_dict, self.control_lora)\n ControlLoraAdapter.load_zero_convolution_layers(state_dict, self.control_lora)\n ControlLoraAdapter.load_condition_encoder(state_dict, self.control_lora)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.ControlLoraAdapter.load_zero_convolution_layers","title":"load_zero_convolution_layers <code>staticmethod</code>","text":"<pre><code>load_zero_convolution_layers(\n state_dict: dict[str, Tensor], control_lora: ControlLora\n)\n</code></pre> <p>Load the <code>ZeroConvolution</code> layers from the state_dict into the <code>ControlLora</code>.</p> <p>Parameters:</p> Name Type Description Default <code>state_dict</code> <code>dict[str, Tensor]</code> <p>The state_dict containing the ZeroConvolution layers to load.</p> required <code>control_lora</code> <code>ControlLora</code> <p>The ControlLora to load the ZeroConvolution layers into.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/control_lora.py</code> <pre><code>@staticmethod\ndef load_zero_convolution_layers(\n state_dict: dict[str, Tensor],\n control_lora: ControlLora,\n):\n \"\"\"Load the `ZeroConvolution` layers from the state_dict into the `ControlLora`.\n\n Args:\n state_dict: The state_dict containing the ZeroConvolution layers to load.\n control_lora: The ControlLora to load the ZeroConvolution layers into.\n \"\"\"\n zero_convolution_layers = list(control_lora.layers(ZeroConvolution))\n for i, zero_convolution_layer in enumerate(zero_convolution_layers):\n zero_convolution_state_dict = {\n key.removeprefix(f\"ZeroConvolution_{i+1:02d}.\"): value\n for key, value in state_dict.items()\n if f\"ZeroConvolution_{i+1:02d}\" in key\n }\n zero_convolution_layer.load_state_dict(zero_convolution_state_dict)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.SDXLAutoencoder","title":"SDXLAutoencoder","text":"<pre><code>SDXLAutoencoder(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>LatentDiffusionAutoencoder</code></p> <p>Stable Diffusion XL autoencoder model.</p> <p>Attributes:</p> Name Type Description <code>encoder_scale</code> <code>float</code> <p>The encoder scale to use.</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def __init__(\n self,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initializes the model.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n Encoder(device=device, dtype=dtype),\n Decoder(device=device, dtype=dtype),\n )\n self._tile_size = None\n self._blending = None\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.SDXLIPAdapter","title":"SDXLIPAdapter","text":"<pre><code>SDXLIPAdapter(\n target: SDXLUNet,\n clip_image_encoder: CLIPImageEncoderH | None = None,\n image_proj: (\n ImageProjection | PerceiverResampler | None\n ) = None,\n scale: float = 1.0,\n fine_grained: bool = False,\n weights: dict[str, Tensor] | None = None,\n)\n</code></pre> <p> Bases: <code>IPAdapter[SDXLUNet]</code></p> <p>Image Prompt adapter for the Stable Diffusion XL U-Net model.</p> <p>Parameters:</p> Name Type Description Default <code>target</code> <code>SDXLUNet</code> <p>The SDXLUNet model to adapt.</p> required <code>clip_image_encoder</code> <code>CLIPImageEncoderH | None</code> <p>The CLIP image encoder to use.</p> <code>None</code> <code>image_proj</code> <code>ImageProjection | PerceiverResampler | None</code> <p>The image projection to use.</p> <code>None</code> <code>scale</code> <code>float</code> <p>The scale to use for the image prompt.</p> <code>1.0</code> <code>fine_grained</code> <code>bool</code> <p>Whether to use fine-grained image prompt.</p> <code>False</code> <code>weights</code> <code>dict[str, Tensor] | None</code> <p>The weights of the IPAdapter.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/image_prompt.py</code> <pre><code>def __init__(\n self,\n target: SDXLUNet,\n clip_image_encoder: CLIPImageEncoderH | None = None,\n image_proj: ImageProjection | PerceiverResampler | None = None,\n scale: float = 1.0,\n fine_grained: bool = False,\n weights: dict[str, Tensor] | None = None,\n) -> None:\n \"\"\"Initialize the adapter.\n\n Args:\n target: The SDXLUNet model to adapt.\n clip_image_encoder: The CLIP image encoder to use.\n image_proj: The image projection to use.\n scale: The scale to use for the image prompt.\n fine_grained: Whether to use fine-grained image prompt.\n weights: The weights of the IPAdapter.\n \"\"\"\n clip_image_encoder = clip_image_encoder or CLIPImageEncoderH(device=target.device, dtype=target.dtype)\n\n if image_proj is None:\n cross_attn_2d = target.ensure_find(CrossAttentionBlock2d)\n image_proj = (\n ImageProjection(\n clip_image_embedding_dim=clip_image_encoder.output_dim,\n clip_text_embedding_dim=cross_attn_2d.context_embedding_dim,\n device=target.device,\n dtype=target.dtype,\n )\n if not fine_grained\n else PerceiverResampler(\n latents_dim=1280, # not `cross_attn_2d.context_embedding_dim` in this case\n num_attention_layers=4,\n num_attention_heads=20,\n head_dim=64,\n num_tokens=16,\n input_dim=clip_image_encoder.embedding_dim, # = dim before final projection\n output_dim=cross_attn_2d.context_embedding_dim,\n device=target.device,\n dtype=target.dtype,\n )\n )\n elif fine_grained:\n assert isinstance(image_proj, PerceiverResampler)\n\n super().__init__(\n target=target,\n clip_image_encoder=clip_image_encoder,\n image_proj=image_proj,\n scale=scale,\n fine_grained=fine_grained,\n weights=weights,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.SDXLLcmAdapter","title":"SDXLLcmAdapter","text":"<pre><code>SDXLLcmAdapter(\n target: SDXLUNet,\n condition_scale_embedding_dim: int = 256,\n condition_scale: float = 7.5,\n)\n</code></pre> <p> Bases: <code>Chain</code>, <code>Adapter[SDXLUNet]</code></p> <p>Note that LCM must be used without CFG. You can disable CFG on SD by setting the <code>classifier_free_guidance</code> attribute to <code>False</code>.</p> <p>Parameters:</p> Name Type Description Default <code>target</code> <code>SDXLUNet</code> <p>A SDXL UNet.</p> required <code>condition_scale_embedding_dim</code> <code>int</code> <p>LCM uses a condition scale embedding, this is its dimension.</p> <code>256</code> <code>condition_scale</code> <code>float</code> <p>Because of the embedding, the condition scale must be passed to this adapter instead of SD. The condition scale passed to SD will be ignored.</p> <code>7.5</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/lcm.py</code> <pre><code>def __init__(\n self,\n target: SDXLUNet,\n condition_scale_embedding_dim: int = 256,\n condition_scale: float = 7.5,\n) -> None:\n \"\"\"Adapt [the SDXl UNet][refiners.foundationals.latent_diffusion.stable_diffusion_xl.unet.SDXLUNet]\n for use with [LCMSolver][refiners.foundationals.latent_diffusion.solvers.lcm.LCMSolver].\n\n Note that LCM must be used *without* CFG. You can disable CFG on SD by setting the\n `classifier_free_guidance` attribute to `False`.\n\n Args:\n target: A SDXL UNet.\n condition_scale_embedding_dim: LCM uses a condition scale embedding, this is its dimension.\n condition_scale: Because of the embedding, the condition scale must be passed to this adapter\n instead of SD. The condition scale passed to SD will be ignored.\n \"\"\"\n assert condition_scale_embedding_dim % 2 == 0\n self.condition_scale_embedding_dim = condition_scale_embedding_dim\n self.condition_scale = condition_scale\n with self.setup_adapter(target):\n super().__init__(target)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.SDXLUNet","title":"SDXLUNet","text":"<pre><code>SDXLUNet(\n in_channels: int,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Stable Diffusion XL U-Net.</p> <p>See [arXiv:2307.01952] SDXL: Improving Latent Diffusion Models for High-Resolution Image Synthesis for more details.</p> <p>Parameters:</p> Name Type Description Default <code>in_channels</code> <code>int</code> <p>Number of input channels.</p> required <code>device</code> <code>device | str | None</code> <p>Device to use for computation.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>Data type to use for computation.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/unet.py</code> <pre><code>def __init__(\n self,\n in_channels: int,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize the U-Net.\n\n Args:\n in_channels: Number of input channels.\n device: Device to use for computation.\n dtype: Data type to use for computation.\n \"\"\"\n self.in_channels = in_channels\n super().__init__(\n TimestepEncoder(device=device, dtype=dtype),\n DownBlocks(in_channels=in_channels, device=device, dtype=dtype),\n MiddleBlock(device=device, dtype=dtype),\n fl.Residual(fl.UseContext(context=\"unet\", key=\"residuals\").compose(lambda x: x[-1])),\n UpBlocks(device=device, dtype=dtype),\n OutputBlock(device=device, dtype=dtype),\n )\n for residual_block in self.layers(ResidualBlock):\n chain = residual_block.layer(\"Chain\", fl.Chain)\n RangeAdapter2d(\n target=chain.layer(\"Conv2d_1\", fl.Conv2d),\n channels=residual_block.out_channels,\n embedding_dim=1280,\n context_key=\"timestep_embedding\",\n device=device,\n dtype=dtype,\n ).inject(chain)\n for n, block in enumerate(iterable=cast(list[fl.Chain], self.DownBlocks)):\n block.append(module=ResidualAccumulator(n=n))\n for n, block in enumerate(iterable=cast(list[fl.Chain], self.UpBlocks)):\n block.insert(index=0, module=ResidualConcatenator(n=-n - 2))\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.SDXLUNet.set_clip_text_embedding","title":"set_clip_text_embedding","text":"<pre><code>set_clip_text_embedding(\n clip_text_embedding: Tensor,\n) -> None\n</code></pre> <p>Set the clip text embedding context.</p> Note <p>This context is required by the <code>SDXLCrossAttention</code> blocks.</p> <p>Parameters:</p> Name Type Description Default <code>clip_text_embedding</code> <code>Tensor</code> <p>The CLIP text embedding tensor.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/unet.py</code> <pre><code>def set_clip_text_embedding(self, clip_text_embedding: Tensor) -> None:\n \"\"\"Set the clip text embedding context.\n\n Note:\n This context is required by the `SDXLCrossAttention` blocks.\n\n Args:\n clip_text_embedding: The CLIP text embedding tensor.\n \"\"\"\n self.set_context(context=\"cross_attention_block\", value={\"clip_text_embedding\": clip_text_embedding})\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.SDXLUNet.set_pooled_text_embedding","title":"set_pooled_text_embedding","text":"<pre><code>set_pooled_text_embedding(\n pooled_text_embedding: Tensor,\n) -> None\n</code></pre> <p>Set the pooled text embedding context.</p> Note <p>This is required by <code>TextTimeEmbedding</code>.</p> <p>Parameters:</p> Name Type Description Default <code>pooled_text_embedding</code> <code>Tensor</code> <p>The pooled text embedding tensor.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/unet.py</code> <pre><code>def set_pooled_text_embedding(self, pooled_text_embedding: Tensor) -> None:\n \"\"\"Set the pooled text embedding context.\n\n Note:\n This is required by `TextTimeEmbedding`.\n\n Args:\n pooled_text_embedding: The pooled text embedding tensor.\n \"\"\"\n self.set_context(context=\"diffusion\", value={\"pooled_text_embedding\": pooled_text_embedding})\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.SDXLUNet.set_time_ids","title":"set_time_ids","text":"<pre><code>set_time_ids(time_ids: Tensor) -> None\n</code></pre> <p>Set the time IDs context.</p> Note <p>This is required by <code>TextTimeEmbedding</code>.</p> <p>Parameters:</p> Name Type Description Default <code>time_ids</code> <code>Tensor</code> <p>The time IDs tensor.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/unet.py</code> <pre><code>def set_time_ids(self, time_ids: Tensor) -> None:\n \"\"\"Set the time IDs context.\n\n Note:\n This is required by `TextTimeEmbedding`.\n\n Args:\n time_ids: The time IDs tensor.\n \"\"\"\n self.set_context(context=\"diffusion\", value={\"time_ids\": time_ids})\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.SDXLUNet.set_timestep","title":"set_timestep","text":"<pre><code>set_timestep(timestep: Tensor) -> None\n</code></pre> <p>Set the timestep context.</p> Note <p>This is required by <code>TimestepEncoder</code>.</p> <p>Parameters:</p> Name Type Description Default <code>timestep</code> <code>Tensor</code> <p>The timestep tensor.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/unet.py</code> <pre><code>def set_timestep(self, timestep: Tensor) -> None:\n \"\"\"Set the timestep context.\n\n Note:\n This is required by `TimestepEncoder`.\n\n Args:\n timestep: The timestep tensor.\n \"\"\"\n self.set_context(context=\"diffusion\", value={\"timestep\": timestep})\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.StableDiffusion_XL","title":"StableDiffusion_XL","text":"<pre><code>StableDiffusion_XL(\n unet: SDXLUNet | None = None,\n lda: SDXLAutoencoder | None = None,\n clip_text_encoder: DoubleTextEncoder | None = None,\n solver: Solver | None = None,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>LatentDiffusionModel</code></p> <p>Stable Diffusion XL model.</p> <p>Attributes:</p> Name Type Description <code>unet</code> <code>SDXLUNet</code> <p>The U-Net model.</p> <code>clip_text_encoder</code> <code>DoubleTextEncoder</code> <p>The text encoder.</p> <code>lda</code> <code>SDXLAutoencoder</code> <p>The image autoencoder.</p> <p>Parameters:</p> Name Type Description Default <code>unet</code> <code>SDXLUNet | None</code> <p>The SDXLUNet U-Net model to use.</p> <code>None</code> <code>lda</code> <code>SDXLAutoencoder | None</code> <p>The SDXLAutoencoder image autoencoder to use.</p> <code>None</code> <code>clip_text_encoder</code> <code>DoubleTextEncoder | None</code> <p>The DoubleTextEncoder text encoder to use.</p> <code>None</code> <code>solver</code> <code>Solver | None</code> <p>The solver to use.</p> <code>None</code> <code>device</code> <code>device | str</code> <p>The PyTorch device to use.</p> <code>'cpu'</code> <code>dtype</code> <code>dtype</code> <p>The PyTorch data type to use.</p> <code>float32</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/model.py</code> <pre><code>def __init__(\n self,\n unet: SDXLUNet | None = None,\n lda: SDXLAutoencoder | None = None,\n clip_text_encoder: DoubleTextEncoder | None = None,\n solver: Solver | None = None,\n device: Device | str = \"cpu\",\n dtype: DType = torch.float32,\n) -> None:\n \"\"\"Initializes the model.\n\n Args:\n unet: The SDXLUNet U-Net model to use.\n lda: The SDXLAutoencoder image autoencoder to use.\n clip_text_encoder: The DoubleTextEncoder text encoder to use.\n solver: The solver to use.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n unet = unet or SDXLUNet(in_channels=4)\n lda = lda or SDXLAutoencoder()\n clip_text_encoder = clip_text_encoder or DoubleTextEncoder()\n solver = solver or DDIM(num_inference_steps=30)\n\n super().__init__(\n unet=unet,\n lda=lda,\n clip_text_encoder=clip_text_encoder,\n solver=solver,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.StableDiffusion_XL.default_time_ids","title":"default_time_ids <code>property</code>","text":"<pre><code>default_time_ids: Tensor\n</code></pre> <p>The default time IDs to use.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.StableDiffusion_XL.compute_clip_text_embedding","title":"compute_clip_text_embedding","text":"<pre><code>compute_clip_text_embedding(\n text: str | list[str],\n negative_text: str | list[str] = \"\",\n) -> tuple[Tensor, Tensor]\n</code></pre> <p>Compute the CLIP text embedding associated with the given prompt and negative prompt.</p> <p>Parameters:</p> Name Type Description Default <code>text</code> <code>str | list[str]</code> <p>The prompt to compute the CLIP text embedding of.</p> required <code>negative_text</code> <code>str | list[str]</code> <p>The negative prompt to compute the CLIP text embedding of. If not provided, the negative prompt is assumed to be empty (i.e., <code>\"\"</code>).</p> <code>''</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/model.py</code> <pre><code>def compute_clip_text_embedding(\n self, text: str | list[str], negative_text: str | list[str] = \"\"\n) -> tuple[Tensor, Tensor]:\n \"\"\"Compute the CLIP text embedding associated with the given prompt and negative prompt.\n\n Args:\n text: The prompt to compute the CLIP text embedding of.\n negative_text: The negative prompt to compute the CLIP text embedding of.\n If not provided, the negative prompt is assumed to be empty (i.e., `\"\"`).\n \"\"\"\n\n text = [text] if isinstance(text, str) else text\n\n if not self.classifier_free_guidance:\n return self.clip_text_encoder(text)\n\n negative_text = [negative_text] if isinstance(negative_text, str) else negative_text\n assert len(text) == len(negative_text), \"The length of the text list and negative_text should be the same\"\n\n conditional_embedding, conditional_pooled_embedding = self.clip_text_encoder(text)\n negative_embedding, negative_pooled_embedding = self.clip_text_encoder(negative_text)\n\n return torch.cat(tensors=(negative_embedding, conditional_embedding), dim=0), torch.cat(\n tensors=(negative_pooled_embedding, conditional_pooled_embedding), dim=0\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.StableDiffusion_XL.compute_self_attention_guidance","title":"compute_self_attention_guidance","text":"<pre><code>compute_self_attention_guidance(\n x: Tensor,\n noise: Tensor,\n step: int,\n *,\n clip_text_embedding: Tensor,\n pooled_text_embedding: Tensor,\n time_ids: Tensor,\n **kwargs: Tensor\n) -> Tensor\n</code></pre> <p>Compute the self-attention guidance.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The input tensor.</p> required <code>noise</code> <code>Tensor</code> <p>The noise tensor.</p> required <code>step</code> <code>int</code> <p>The step to compute the self-attention guidance at.</p> required <code>clip_text_embedding</code> <code>Tensor</code> <p>The CLIP text embedding to compute the self-attention guidance with.</p> required <code>pooled_text_embedding</code> <code>Tensor</code> <p>The pooled CLIP text embedding to compute the self-attention guidance with.</p> required <code>time_ids</code> <code>Tensor</code> <p>The time IDs to compute the self-attention guidance with.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The computed self-attention guidance.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/model.py</code> <pre><code>def compute_self_attention_guidance(\n self,\n x: Tensor,\n noise: Tensor,\n step: int,\n *,\n clip_text_embedding: Tensor,\n pooled_text_embedding: Tensor,\n time_ids: Tensor,\n **kwargs: Tensor,\n) -> Tensor:\n \"\"\"Compute the self-attention guidance.\n\n Args:\n x: The input tensor.\n noise: The noise tensor.\n step: The step to compute the self-attention guidance at.\n clip_text_embedding: The CLIP text embedding to compute the self-attention guidance with.\n pooled_text_embedding: The pooled CLIP text embedding to compute the self-attention guidance with.\n time_ids: The time IDs to compute the self-attention guidance with.\n\n Returns:\n The computed self-attention guidance.\n \"\"\"\n sag = self._find_sag_adapter()\n assert sag is not None\n\n degraded_latents = sag.compute_degraded_latents(\n solver=self.solver,\n latents=x,\n noise=noise,\n step=step,\n classifier_free_guidance=True,\n )\n\n negative_text_embedding, _ = clip_text_embedding.chunk(2)\n negative_pooled_embedding, _ = pooled_text_embedding.chunk(2)\n timestep = self.solver.timesteps[step].unsqueeze(dim=0)\n time_ids, _ = time_ids.chunk(2)\n\n self.set_unet_context(\n timestep=timestep,\n clip_text_embedding=negative_text_embedding,\n pooled_text_embedding=negative_pooled_embedding,\n time_ids=time_ids,\n )\n if \"ip_adapter\" in self.unet.provider.contexts:\n # this implementation is a bit hacky, it should be refactored in the future\n ip_adapter_context = self.unet.use_context(\"ip_adapter\")\n image_embedding_copy = ip_adapter_context[\"clip_image_embedding\"].clone()\n ip_adapter_context[\"clip_image_embedding\"], _ = ip_adapter_context[\"clip_image_embedding\"].chunk(2)\n degraded_noise = self.unet(degraded_latents)\n ip_adapter_context[\"clip_image_embedding\"] = image_embedding_copy\n else:\n degraded_noise = self.unet(degraded_latents)\n\n return sag.scale * (noise - degraded_noise)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.StableDiffusion_XL.has_self_attention_guidance","title":"has_self_attention_guidance","text":"<pre><code>has_self_attention_guidance() -> bool\n</code></pre> <p>Whether the model has self-attention guidance or not.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/model.py</code> <pre><code>def has_self_attention_guidance(self) -> bool:\n \"\"\"Whether the model has self-attention guidance or not.\"\"\"\n return self._find_sag_adapter() is not None\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.StableDiffusion_XL.set_self_attention_guidance","title":"set_self_attention_guidance","text":"<pre><code>set_self_attention_guidance(\n enable: bool, scale: float = 1.0\n) -> None\n</code></pre> <p>Sets the self-attention guidance.</p> <p>See [arXiv:2210.00939] Improving Sample Quality of Diffusion Models Using Self-Attention Guidance for more details.</p> <p>Parameters:</p> Name Type Description Default <code>enable</code> <code>bool</code> <p>Whether to enable self-attention guidance or not.</p> required <code>scale</code> <code>float</code> <p>The scale to use.</p> <code>1.0</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/model.py</code> <pre><code>def set_self_attention_guidance(self, enable: bool, scale: float = 1.0) -> None:\n \"\"\"Sets the self-attention guidance.\n\n See [[arXiv:2210.00939] Improving Sample Quality of Diffusion Models Using Self-Attention Guidance](https://arxiv.org/abs/2210.00939)\n for more details.\n\n Args:\n enable: Whether to enable self-attention guidance or not.\n scale: The scale to use.\n \"\"\"\n if enable:\n if sag := self._find_sag_adapter():\n sag.scale = scale\n else:\n SDXLSAGAdapter(target=self.unet, scale=scale).inject()\n else:\n if sag := self._find_sag_adapter():\n sag.eject()\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.StableDiffusion_XL.set_unet_context","title":"set_unet_context","text":"<pre><code>set_unet_context(\n *,\n timestep: Tensor,\n clip_text_embedding: Tensor,\n pooled_text_embedding: Tensor,\n time_ids: Tensor,\n **_: Tensor\n) -> None\n</code></pre> <p>Set the various context parameters required by the U-Net model.</p> <p>Parameters:</p> Name Type Description Default <code>timestep</code> <code>Tensor</code> <p>The timestep to set.</p> required <code>clip_text_embedding</code> <code>Tensor</code> <p>The CLIP text embedding to set.</p> required <code>pooled_text_embedding</code> <code>Tensor</code> <p>The pooled CLIP text embedding to set.</p> required <code>time_ids</code> <code>Tensor</code> <p>The time IDs to set.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/model.py</code> <pre><code>def set_unet_context(\n self,\n *,\n timestep: Tensor,\n clip_text_embedding: Tensor,\n pooled_text_embedding: Tensor,\n time_ids: Tensor,\n **_: Tensor,\n) -> None:\n \"\"\"Set the various context parameters required by the U-Net model.\n\n Args:\n timestep: The timestep to set.\n clip_text_embedding: The CLIP text embedding to set.\n pooled_text_embedding: The pooled CLIP text embedding to set.\n time_ids: The time IDs to set.\n \"\"\"\n self.unet.set_timestep(timestep=timestep)\n self.unet.set_clip_text_embedding(clip_text_embedding=clip_text_embedding)\n self.unet.set_pooled_text_embedding(pooled_text_embedding=pooled_text_embedding)\n self.unet.set_time_ids(time_ids=time_ids)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_xl.add_lcm_lora","title":"add_lcm_lora","text":"<pre><code>add_lcm_lora(\n manager: SDLoraManager,\n tensors: dict[str, Tensor],\n name: str = \"lcm\",\n scale: float = 8.0 / 64.0,\n check_validity: bool = True,\n) -> None\n</code></pre> <p>Add a LCM-LoRA or a LoRA with similar structure such as SDXL-Lightning to SDXLUNet.</p> <p>This is a complex LoRA so SDLoraManager.add_loras() is not enough. Instead, we add the LoRAs to the UNet in several iterations, using the filtering mechanism of auto_attach_loras.</p> <p>LCM-LoRA can be used with or without CFG in SD. If you use CFG, typical values range from 1.0 (same as no CFG) to 2.0.</p> <p>Parameters:</p> Name Type Description Default <code>manager</code> <code>SDLoraManager</code> <p>A SDLoraManager for SDXL.</p> required <code>tensors</code> <code>dict[str, Tensor]</code> <p>The <code>state_dict</code> of the LoRA.</p> required <code>name</code> <code>str</code> <p>The name of the LoRA.</p> <code>'lcm'</code> <code>scale</code> <code>float</code> <p>The scale to use for the LoRA (should generally not be changed, those LoRAs must use alpha / rank).</p> <code>8.0 / 64.0</code> <code>check_validity</code> <code>bool</code> <p>Perform additional checks, raise an exception if they fail.</p> <code>True</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_xl/lcm_lora.py</code> <pre><code>def add_lcm_lora(\n manager: SDLoraManager,\n tensors: dict[str, torch.Tensor],\n name: str = \"lcm\",\n scale: float = 8.0 / 64.0,\n check_validity: bool = True,\n) -> None:\n \"\"\"Add a [LCM-LoRA](https://arxiv.org/abs/2311.05556) or a LoRA with similar structure\n such as [SDXL-Lightning](https://arxiv.org/abs/2402.13929) to SDXLUNet.\n\n This is a complex LoRA so [SDLoraManager.add_loras()][refiners.foundationals.latent_diffusion.lora.SDLoraManager.add_loras]\n is not enough. Instead, we add the LoRAs to the UNet in several iterations, using the filtering mechanism of\n [auto_attach_loras][refiners.fluxion.adapters.lora.auto_attach_loras].\n\n LCM-LoRA can be used with or without CFG in SD.\n If you use CFG, typical values range from 1.0 (same as no CFG) to 2.0.\n\n Args:\n manager: A SDLoraManager for SDXL.\n tensors: The `state_dict` of the LoRA.\n name: The name of the LoRA.\n scale: The scale to use for the LoRA (should generally not be changed, those LoRAs must use alpha / rank).\n check_validity: Perform additional checks, raise an exception if they fail.\n \"\"\"\n\n assert isinstance(manager.target, StableDiffusion_XL)\n unet = manager.target.unet\n\n loras = Lora.from_dict(name, {k: v.to(unet.device, unet.dtype) for k, v in tensors.items()})\n assert all(k.startswith(\"lora_unet_\") for k in loras.keys())\n loras = {k: loras[k] for k in sorted(loras.keys(), key=SDLoraManager.sort_keys)}\n\n debug_map: list[tuple[str, str]] | None = [] if check_validity else None\n\n # Projections are in `SDXLCrossAttention` but not in `CrossAttentionBlock`.\n loras_projs = {k: v for k, v in loras.items() if k.endswith(\"proj_in\") or k.endswith(\"proj_out\")}\n auto_attach_loras(\n loras_projs,\n unet,\n exclude=[\"CrossAttentionBlock\"],\n include=[\"SDXLCrossAttention\"],\n debug_map=debug_map,\n )\n\n manager.add_loras_to_unet(\n {k: v for k, v in loras.items() if k not in loras_projs},\n debug_map=debug_map,\n )\n\n if debug_map is not None:\n _check_validity(debug_map)\n\n # LoRAs are finally injected, set the scale with the manager.\n manager.set_scale(name, scale)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.ICLight","title":"ICLight","text":"<pre><code>ICLight(\n patch_weights: dict[str, Tensor],\n unet: SD1UNet,\n lda: SD1Autoencoder | None = None,\n clip_text_encoder: CLIPTextEncoderL | None = None,\n solver: Solver | None = None,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>StableDiffusion_1</code></p> <p>IC-Light is a Stable Diffusion model that can be used to relight a reference image.</p> <p>At initialization, the UNet will be patched to accept four additional input channels. Only the text-conditioned relighting model is supported for now.</p> Example <pre><code>import torch\nfrom huggingface_hub import hf_hub_download\nfrom PIL import Image\n\nfrom refiners.fluxion.utils import load_from_safetensors, manual_seed, no_grad\nfrom refiners.foundationals.clip import CLIPTextEncoderL\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_1 import SD1Autoencoder, SD1UNet\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_1.ic_light import ICLight\n\ndevice = torch.device(\"cuda\" if torch.cuda.is_available() else \"cpu\")\ndtype = torch.float32\nno_grad().__enter__()\nmanual_seed(42)\n\nsd = ICLight(\n patch_weights=load_from_safetensors(\n path=hf_hub_download(\n repo_id=\"refiners/ic_light.sd1_5.fc\",\n filename=\"model.safetensors\",\n ),\n device=device,\n ),\n unet=SD1UNet(in_channels=4, device=device, dtype=dtype).load_from_safetensors(\n tensors_path=hf_hub_download(\n repo_id=\"refiners/realistic_vision.v5_1.sd1_5.unet\",\n filename=\"model.safetensors\",\n )\n ),\n clip_text_encoder=CLIPTextEncoderL(device=device, dtype=dtype).load_from_safetensors(\n tensors_path=hf_hub_download(\n repo_id=\"refiners/realistic_vision.v5_1.sd1_5.text_encoder\",\n filename=\"model.safetensors\",\n )\n ),\n lda=SD1Autoencoder(device=device, dtype=dtype).load_from_safetensors(\n tensors_path=hf_hub_download(\n repo_id=\"refiners/realistic_vision.v5_1.sd1_5.autoencoder\",\n filename=\"model.safetensors\",\n )\n ),\n device=device,\n dtype=dtype,\n)\n\nprompt = \"soft lighting, high-quality professional image\"\nnegative_prompt = \"lowres, bad anatomy, bad hands, cropped, worst quality\"\nclip_text_embedding = sd.compute_clip_text_embedding(text=prompt, negative_text=negative_prompt)\n\nimage = Image.open(\"reference-image.png\").resize((512, 512))\nsd.set_ic_light_condition(image)\n\nx = torch.randn(\n size=(1, 4, 64, 64),\n device=device,\n dtype=dtype,\n)\n\nfor step in sd.steps:\n x = sd(\n x=x,\n step=step,\n clip_text_embedding=clip_text_embedding,\n condition_scale=1.5,\n )\npredicted_image = sd.lda.latents_to_image(x)\n\npredicted_image.save(\"ic-light-output.png\")\n</code></pre> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/ic_light.py</code> <pre><code>def __init__(\n self,\n patch_weights: dict[str, torch.Tensor],\n unet: SD1UNet,\n lda: SD1Autoencoder | None = None,\n clip_text_encoder: CLIPTextEncoderL | None = None,\n solver: Solver | None = None,\n device: torch.device | str = \"cpu\",\n dtype: torch.dtype = torch.float32,\n) -> None:\n super().__init__(\n unet=unet,\n lda=lda,\n clip_text_encoder=clip_text_encoder,\n solver=solver,\n device=device,\n dtype=dtype,\n )\n self._extend_conv_in()\n self._apply_patch(weights=patch_weights)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.ICLight.compute_gray_composite","title":"compute_gray_composite <code>staticmethod</code>","text":"<pre><code>compute_gray_composite(image: Image, mask: Image) -> Image\n</code></pre> <p>Compute a grayscale composite of an image and a mask.</p> <p>IC-Light will recreate the image</p> <p>Parameters:</p> Name Type Description Default <code>image</code> <code>Image</code> <p>The image to composite.</p> required <code>mask</code> <code>Image</code> <p>The mask to use for the composite.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/ic_light.py</code> <pre><code>@staticmethod\ndef compute_gray_composite(\n image: Image.Image,\n mask: Image.Image,\n) -> Image.Image:\n \"\"\"Compute a grayscale composite of an image and a mask.\n\n IC-Light will recreate the image\n\n Args:\n image: The image to composite.\n mask: The mask to use for the composite.\n \"\"\"\n assert mask.mode == \"L\", \"Mask must be a grayscale image\"\n assert image.size == mask.size, \"Image and mask must have the same size\"\n background = Image.new(\"RGB\", image.size, (127, 127, 127))\n return Image.composite(image, background, mask)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.ICLight.set_ic_light_condition","title":"set_ic_light_condition","text":"<pre><code>set_ic_light_condition(\n image: Image, mask: Image | None = None\n) -> None\n</code></pre> <p>Set the IC light condition.</p> <p>Parameters:</p> Name Type Description Default <code>image</code> <code>Image</code> <p>The reference image.</p> required <code>mask</code> <code>Image | None</code> <p>The mask to use for the reference image.</p> <code>None</code> <p>If a mask is provided, it will be used to compute a grayscale composite of the image and the mask ; otherwise, the image will be used as is, but note that IC-Light requires a 127-valued gray background to work.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/ic_light.py</code> <pre><code>def set_ic_light_condition(\n self,\n image: Image.Image,\n mask: Image.Image | None = None,\n) -> None:\n \"\"\"Set the IC light condition.\n\n Args:\n image: The reference image.\n mask: The mask to use for the reference image.\n\n If a mask is provided, it will be used to compute a grayscale composite of the image and the mask ; otherwise,\n the image will be used as is, but note that IC-Light requires a 127-valued gray background to work.\n \"\"\"\n if mask is not None:\n image = self.compute_gray_composite(image=image, mask=mask)\n latents = self.lda.image_to_latents(image)\n self._ic_light_condition = latents\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.SD1Autoencoder","title":"SD1Autoencoder","text":"<pre><code>SD1Autoencoder(\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>LatentDiffusionAutoencoder</code></p> <p>Stable Diffusion 1.5 autoencoder model.</p> <p>Attributes:</p> Name Type Description <code>encoder_scale</code> <code>float</code> <p>The encoder scale to use.</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to use.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/auto_encoder.py</code> <pre><code>def __init__(\n self,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initializes the model.\n\n Args:\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n super().__init__(\n Encoder(device=device, dtype=dtype),\n Decoder(device=device, dtype=dtype),\n )\n self._tile_size = None\n self._blending = None\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.SD1ELLAAdapter","title":"SD1ELLAAdapter","text":"<pre><code>SD1ELLAAdapter(\n target: SD1UNet,\n weights: dict[str, Tensor] | None = None,\n)\n</code></pre> <p> Bases: <code>ELLAAdapter[SD1UNet]</code></p> <p><code>ELLA</code> adapter for Stable Diffusion 1.5.</p> <p>Parameters:</p> Name Type Description Default <code>target</code> <code>SD1UNet</code> <p>The target model to adapt.</p> required <code>weights</code> <code>dict[str, Tensor] | None</code> <p>The weights of the ELLA adapter (see <code>scripts/conversion/convert_ella_adapter.py</code>).</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/ella_adapter.py</code> <pre><code>def __init__(self, target: SD1UNet, weights: dict[str, Tensor] | None = None) -> None:\n \"\"\"Initialize the adapter.\n\n Args:\n target: The target model to adapt.\n weights: The weights of the ELLA adapter (see `scripts/conversion/convert_ella_adapter.py`).\n \"\"\"\n latents_encoder = ELLA(\n time_channel=320,\n timestep_embedding_dim=768,\n width=768,\n num_layers=6,\n num_heads=8,\n num_latents=64,\n input_dim=2048,\n device=target.device,\n dtype=target.dtype,\n )\n super().__init__(target=target, latents_encoder=latents_encoder, weights=weights)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.SD1UNet","title":"SD1UNet","text":"<pre><code>SD1UNet(\n in_channels: int,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Stable Diffusion 1.5 U-Net.</p> <p>See [arXiv:2112.10752] High-Resolution Image Synthesis with Latent Diffusion Models for more details.</p> <p>Parameters:</p> Name Type Description Default <code>in_channels</code> <code>int</code> <p>The number of input channels.</p> required <code>device</code> <code>device | str | None</code> <p>The PyTorch device to use for computation.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch dtype to use for computation.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/unet.py</code> <pre><code>def __init__(\n self,\n in_channels: int,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n \"\"\"Initialize the U-Net.\n\n Args:\n in_channels: The number of input channels.\n device: The PyTorch device to use for computation.\n dtype: The PyTorch dtype to use for computation.\n \"\"\"\n self.in_channels = in_channels\n super().__init__(\n TimestepEncoder(device=device, dtype=dtype),\n DownBlocks(in_channels=in_channels, device=device, dtype=dtype),\n fl.Sum(\n fl.UseContext(context=\"unet\", key=\"residuals\").compose(lambda x: x[-1]),\n MiddleBlock(device=device, dtype=dtype),\n ),\n UpBlocks(device=device, dtype=dtype),\n fl.Chain(\n fl.GroupNorm(channels=320, num_groups=32, device=device, dtype=dtype),\n fl.SiLU(),\n fl.Conv2d(\n in_channels=320,\n out_channels=4,\n kernel_size=3,\n stride=1,\n padding=1,\n device=device,\n dtype=dtype,\n ),\n ),\n )\n for residual_block in self.layers(ResidualBlock):\n chain = residual_block.layer(\"Chain\", fl.Chain)\n RangeAdapter2d(\n target=chain.layer(\"Conv2d_1\", fl.Conv2d),\n channels=residual_block.out_channels,\n embedding_dim=1280,\n context_key=\"timestep_embedding\",\n device=device,\n dtype=dtype,\n ).inject(chain)\n for n, block in enumerate(cast(Iterable[fl.Chain], self.DownBlocks)):\n block.append(ResidualAccumulator(n))\n for n, block in enumerate(cast(Iterable[fl.Chain], self.UpBlocks)):\n block.insert(0, ResidualConcatenator(-n - 2))\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.SD1UNet.set_clip_text_embedding","title":"set_clip_text_embedding","text":"<pre><code>set_clip_text_embedding(\n clip_text_embedding: Tensor,\n) -> None\n</code></pre> <p>Set the CLIP text embedding.</p> Note <p>This context is required by the <code>CLIPLCrossAttention</code> blocks.</p> <p>Parameters:</p> Name Type Description Default <code>clip_text_embedding</code> <code>Tensor</code> <p>The CLIP text embedding.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/unet.py</code> <pre><code>def set_clip_text_embedding(self, clip_text_embedding: Tensor) -> None:\n \"\"\"Set the CLIP text embedding.\n\n Note:\n This context is required by the `CLIPLCrossAttention` blocks.\n\n Args:\n clip_text_embedding: The CLIP text embedding.\n \"\"\"\n self.set_context(\"cross_attention_block\", {\"clip_text_embedding\": clip_text_embedding})\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.SD1UNet.set_timestep","title":"set_timestep","text":"<pre><code>set_timestep(timestep: Tensor) -> None\n</code></pre> <p>Set the timestep.</p> Note <p>This context is required by <code>TimestepEncoder</code>.</p> <p>Parameters:</p> Name Type Description Default <code>timestep</code> <code>Tensor</code> <p>The timestep.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/unet.py</code> <pre><code>def set_timestep(self, timestep: Tensor) -> None:\n \"\"\"Set the timestep.\n\n Note:\n This context is required by `TimestepEncoder`.\n\n Args:\n timestep: The timestep.\n \"\"\"\n self.set_context(\"diffusion\", {\"timestep\": timestep})\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.StableDiffusion_1","title":"StableDiffusion_1","text":"<pre><code>StableDiffusion_1(\n unet: SD1UNet | None = None,\n lda: SD1Autoencoder | None = None,\n clip_text_encoder: CLIPTextEncoderL | None = None,\n solver: Solver | None = None,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>LatentDiffusionModel</code></p> <p>Stable Diffusion 1.5 model.</p> <p>Attributes:</p> Name Type Description <code>unet</code> <code>SD1UNet</code> <p>The U-Net model.</p> <code>clip_text_encoder</code> <code>CLIPTextEncoderL</code> <p>The text encoder.</p> <code>lda</code> <code>SD1Autoencoder</code> <p>The image autoencoder.</p> <p>Example: <pre><code>import torch\n\nfrom refiners.fluxion.utils import manual_seed, no_grad\nfrom refiners.foundationals.latent_diffusion.stable_diffusion_1 import StableDiffusion_1\n\n# Load SD\nsd15 = StableDiffusion_1(device=\"cuda\", dtype=torch.float16)\n\nsd15.clip_text_encoder.load_from_safetensors(\"sd1_5.text_encoder.safetensors\")\nsd15.unet.load_from_safetensors(\"sd1_5.unet.safetensors\")\nsd15.lda.load_from_safetensors(\"sd1_5.autoencoder.safetensors\")\n\n# Hyperparameters\nprompt = \"a cute cat, best quality, high quality\"\nnegative_prompt = \"monochrome, lowres, bad anatomy, worst quality, low quality\"\nseed = 42\n\nsd15.set_inference_steps(50)\n\nwith no_grad(): # Disable gradient calculation for memory-efficient inference\n clip_text_embedding = sd15.compute_clip_text_embedding(text=prompt, negative_text=negative_prompt)\n manual_seed(seed)\n\n x = sd15.init_latents((512, 512)).to(sd15.device, sd15.dtype)\n\n # Diffusion process\n for step in sd15.steps:\n x = sd15(x, step=step, clip_text_embedding=clip_text_embedding)\n\n predicted_image = sd15.lda.latents_to_image(x)\n predicted_image.save(\"output.png\")\n</code></pre></p> <p>Parameters:</p> Name Type Description Default <code>unet</code> <code>SD1UNet | None</code> <p>The SD1UNet U-Net model to use.</p> <code>None</code> <code>lda</code> <code>SD1Autoencoder | None</code> <p>The SD1Autoencoder image autoencoder to use.</p> <code>None</code> <code>clip_text_encoder</code> <code>CLIPTextEncoderL | None</code> <p>The CLIPTextEncoderL text encoder to use.</p> <code>None</code> <code>solver</code> <code>Solver | None</code> <p>The solver to use.</p> <code>None</code> <code>device</code> <code>device | str</code> <p>The PyTorch device to use.</p> <code>'cpu'</code> <code>dtype</code> <code>dtype</code> <p>The PyTorch data type to use.</p> <code>float32</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/model.py</code> <pre><code>def __init__(\n self,\n unet: SD1UNet | None = None,\n lda: SD1Autoencoder | None = None,\n clip_text_encoder: CLIPTextEncoderL | None = None,\n solver: Solver | None = None,\n device: Device | str = \"cpu\",\n dtype: DType = torch.float32,\n) -> None:\n \"\"\"Initializes the model.\n\n Args:\n unet: The SD1UNet U-Net model to use.\n lda: The SD1Autoencoder image autoencoder to use.\n clip_text_encoder: The CLIPTextEncoderL text encoder to use.\n solver: The solver to use.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n unet = unet or SD1UNet(in_channels=4)\n lda = lda or SD1Autoencoder()\n clip_text_encoder = clip_text_encoder or CLIPTextEncoderL()\n solver = solver or DPMSolver(num_inference_steps=30)\n\n super().__init__(\n unet=unet,\n lda=lda,\n clip_text_encoder=clip_text_encoder,\n solver=solver,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.StableDiffusion_1.compute_clip_text_embedding","title":"compute_clip_text_embedding","text":"<pre><code>compute_clip_text_embedding(\n text: str | list[str],\n negative_text: str | list[str] = \"\",\n) -> Tensor\n</code></pre> <p>Compute the CLIP text embedding associated with the given prompt and negative prompt.</p> <p>Parameters:</p> Name Type Description Default <code>text</code> <code>str | list[str]</code> <p>The prompt to compute the CLIP text embedding of.</p> required <code>negative_text</code> <code>str | list[str]</code> <p>The negative prompt to compute the CLIP text embedding of. If not provided, the negative prompt is assumed to be empty (i.e., <code>\"\"</code>).</p> <code>''</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/model.py</code> <pre><code>def compute_clip_text_embedding(self, text: str | list[str], negative_text: str | list[str] = \"\") -> Tensor:\n \"\"\"Compute the CLIP text embedding associated with the given prompt and negative prompt.\n\n Args:\n text: The prompt to compute the CLIP text embedding of.\n negative_text: The negative prompt to compute the CLIP text embedding of.\n If not provided, the negative prompt is assumed to be empty (i.e., `\"\"`).\n \"\"\"\n text = [text] if isinstance(text, str) else text\n\n if not self.classifier_free_guidance:\n return self.clip_text_encoder(text)\n\n negative_text = [negative_text] if isinstance(negative_text, str) else negative_text\n assert len(text) == len(negative_text), \"The length of the text list and negative_text should be the same\"\n\n conditional_embedding = self.clip_text_encoder(text)\n negative_embedding = self.clip_text_encoder(negative_text)\n\n return torch.cat((negative_embedding, conditional_embedding))\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.StableDiffusion_1.compute_self_attention_guidance","title":"compute_self_attention_guidance","text":"<pre><code>compute_self_attention_guidance(\n x: Tensor,\n noise: Tensor,\n step: int,\n *,\n clip_text_embedding: Tensor,\n **kwargs: Tensor\n) -> Tensor\n</code></pre> <p>Compute the self-attention guidance.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The input tensor.</p> required <code>noise</code> <code>Tensor</code> <p>The noise tensor.</p> required <code>step</code> <code>int</code> <p>The step to compute the self-attention guidance at.</p> required <code>clip_text_embedding</code> <code>Tensor</code> <p>The CLIP text embedding to compute the self-attention guidance with.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The computed self-attention guidance.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/model.py</code> <pre><code>def compute_self_attention_guidance(\n self, x: Tensor, noise: Tensor, step: int, *, clip_text_embedding: Tensor, **kwargs: Tensor\n) -> Tensor:\n \"\"\"Compute the self-attention guidance.\n\n Args:\n x: The input tensor.\n noise: The noise tensor.\n step: The step to compute the self-attention guidance at.\n clip_text_embedding: The CLIP text embedding to compute the self-attention guidance with.\n\n Returns:\n The computed self-attention guidance.\n \"\"\"\n sag = self._find_sag_adapter()\n assert sag is not None\n\n degraded_latents = sag.compute_degraded_latents(\n solver=self.solver,\n latents=x,\n noise=noise,\n step=step,\n classifier_free_guidance=True,\n )\n\n timestep = self.solver.timesteps[step].unsqueeze(dim=0)\n negative_embedding, _ = clip_text_embedding.chunk(2)\n self.set_unet_context(timestep=timestep, clip_text_embedding=negative_embedding, **kwargs)\n if \"ip_adapter\" in self.unet.provider.contexts:\n # this implementation is a bit hacky, it should be refactored in the future\n ip_adapter_context = self.unet.use_context(\"ip_adapter\")\n image_embedding_copy = ip_adapter_context[\"clip_image_embedding\"].clone()\n ip_adapter_context[\"clip_image_embedding\"], _ = ip_adapter_context[\"clip_image_embedding\"].chunk(2)\n degraded_noise = self.unet(degraded_latents)\n ip_adapter_context[\"clip_image_embedding\"] = image_embedding_copy\n else:\n degraded_noise = self.unet(degraded_latents)\n\n return sag.scale * (noise - degraded_noise)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.StableDiffusion_1.has_self_attention_guidance","title":"has_self_attention_guidance","text":"<pre><code>has_self_attention_guidance() -> bool\n</code></pre> <p>Whether the model has self-attention guidance or not.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/model.py</code> <pre><code>def has_self_attention_guidance(self) -> bool:\n \"\"\"Whether the model has self-attention guidance or not.\"\"\"\n return self._find_sag_adapter() is not None\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.StableDiffusion_1.set_self_attention_guidance","title":"set_self_attention_guidance","text":"<pre><code>set_self_attention_guidance(\n enable: bool, scale: float = 1.0\n) -> None\n</code></pre> <p>Set whether to enable self-attention guidance.</p> <p>See [arXiv:2210.00939] Improving Sample Quality of Diffusion Models Using Self-Attention Guidance for more details.</p> <p>Parameters:</p> Name Type Description Default <code>enable</code> <code>bool</code> <p>Whether to enable self-attention guidance.</p> required <code>scale</code> <code>float</code> <p>The scale to use.</p> <code>1.0</code> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/model.py</code> <pre><code>def set_self_attention_guidance(self, enable: bool, scale: float = 1.0) -> None:\n \"\"\"Set whether to enable self-attention guidance.\n\n See [[arXiv:2210.00939] Improving Sample Quality of Diffusion Models Using Self-Attention Guidance](https://arxiv.org/abs/2210.00939)\n for more details.\n\n Args:\n enable: Whether to enable self-attention guidance.\n scale: The scale to use.\n \"\"\"\n if enable:\n if sag := self._find_sag_adapter():\n sag.scale = scale\n else:\n SD1SAGAdapter(target=self.unet, scale=scale).inject()\n else:\n if sag := self._find_sag_adapter():\n sag.eject()\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.StableDiffusion_1.set_unet_context","title":"set_unet_context","text":"<pre><code>set_unet_context(\n *,\n timestep: Tensor,\n clip_text_embedding: Tensor,\n **_: Tensor\n) -> None\n</code></pre> <p>Set the various context parameters required by the U-Net model.</p> <p>Parameters:</p> Name Type Description Default <code>timestep</code> <code>Tensor</code> <p>The timestep tensor to use.</p> required <code>clip_text_embedding</code> <code>Tensor</code> <p>The CLIP text embedding tensor to use.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/model.py</code> <pre><code>def set_unet_context(self, *, timestep: Tensor, clip_text_embedding: Tensor, **_: Tensor) -> None:\n \"\"\"Set the various context parameters required by the U-Net model.\n\n Args:\n timestep: The timestep tensor to use.\n clip_text_embedding: The CLIP text embedding tensor to use.\n \"\"\"\n self.unet.set_timestep(timestep=timestep)\n self.unet.set_clip_text_embedding(clip_text_embedding=clip_text_embedding)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.StableDiffusion_1_Inpainting","title":"StableDiffusion_1_Inpainting","text":"<pre><code>StableDiffusion_1_Inpainting(\n unet: SD1UNet | None = None,\n lda: SD1Autoencoder | None = None,\n clip_text_encoder: CLIPTextEncoderL | None = None,\n solver: Solver | None = None,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>StableDiffusion_1</code></p> <p>Stable Diffusion 1.5 inpainting model.</p> <p>Attributes:</p> Name Type Description <code>unet</code> <p>The U-Net model.</p> <code>clip_text_encoder</code> <p>The text encoder.</p> <code>lda</code> <p>The image autoencoder.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/model.py</code> <pre><code>def __init__(\n self,\n unet: SD1UNet | None = None,\n lda: SD1Autoencoder | None = None,\n clip_text_encoder: CLIPTextEncoderL | None = None,\n solver: Solver | None = None,\n device: Device | str = \"cpu\",\n dtype: DType = torch.float32,\n) -> None:\n self.mask_latents: Tensor | None = None\n self.target_image_latents: Tensor | None = None\n unet = unet or SD1UNet(in_channels=9)\n super().__init__(\n unet=unet,\n lda=lda,\n clip_text_encoder=clip_text_encoder,\n solver=solver,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.StableDiffusion_1_Inpainting.compute_self_attention_guidance","title":"compute_self_attention_guidance","text":"<pre><code>compute_self_attention_guidance(\n x: Tensor,\n noise: Tensor,\n step: int,\n *,\n clip_text_embedding: Tensor,\n **kwargs: Tensor\n) -> Tensor\n</code></pre> <p>Compute the self-attention guidance.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The input tensor.</p> required <code>noise</code> <code>Tensor</code> <p>The noise tensor.</p> required <code>step</code> <code>int</code> <p>The step to compute the self-attention guidance at.</p> required <code>clip_text_embedding</code> <code>Tensor</code> <p>The CLIP text embedding to compute the self-attention guidance with.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The computed self-attention guidance.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/model.py</code> <pre><code>def compute_self_attention_guidance(\n self, x: Tensor, noise: Tensor, step: int, *, clip_text_embedding: Tensor, **kwargs: Tensor\n) -> Tensor:\n \"\"\"Compute the self-attention guidance.\n\n Args:\n x: The input tensor.\n noise: The noise tensor.\n step: The step to compute the self-attention guidance at.\n clip_text_embedding: The CLIP text embedding to compute the self-attention guidance with.\n\n Returns:\n The computed self-attention guidance.\n \"\"\"\n sag = self._find_sag_adapter()\n assert sag is not None\n assert self.mask_latents is not None\n assert self.target_image_latents is not None\n\n degraded_latents = sag.compute_degraded_latents(\n solver=self.solver,\n latents=x,\n noise=noise,\n step=step,\n classifier_free_guidance=True,\n )\n x = torch.cat(\n tensors=(degraded_latents, self.mask_latents, self.target_image_latents),\n dim=1,\n )\n\n timestep = self.solver.timesteps[step].unsqueeze(dim=0)\n negative_embedding, _ = clip_text_embedding.chunk(2)\n self.set_unet_context(timestep=timestep, clip_text_embedding=negative_embedding, **kwargs)\n\n if \"ip_adapter\" in self.unet.provider.contexts:\n # this implementation is a bit hacky, it should be refactored in the future\n ip_adapter_context = self.unet.use_context(\"ip_adapter\")\n image_embedding_copy = ip_adapter_context[\"clip_image_embedding\"].clone()\n ip_adapter_context[\"clip_image_embedding\"], _ = ip_adapter_context[\"clip_image_embedding\"].chunk(2)\n degraded_noise = self.unet(x)\n ip_adapter_context[\"clip_image_embedding\"] = image_embedding_copy\n else:\n degraded_noise = self.unet(x)\n\n return sag.scale * (noise - degraded_noise)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.stable_diffusion_1.StableDiffusion_1_Inpainting.set_inpainting_conditions","title":"set_inpainting_conditions","text":"<pre><code>set_inpainting_conditions(\n target_image: Image,\n mask: Image,\n latents_size: tuple[int, int] = (64, 64),\n) -> tuple[Tensor, Tensor]\n</code></pre> <p>Set the inpainting conditions.</p> <p>Parameters:</p> Name Type Description Default <code>target_image</code> <code>Image</code> <p>The target image to inpaint.</p> required <code>mask</code> <code>Image</code> <p>The mask to use for inpainting.</p> required <code>latents_size</code> <code>tuple[int, int]</code> <p>The size of the latents to use.</p> <code>(64, 64)</code> <p>Returns:</p> Type Description <code>tuple[Tensor, Tensor]</code> <p>The mask latents and the target image latents.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/stable_diffusion_1/model.py</code> <pre><code>def set_inpainting_conditions(\n self,\n target_image: Image.Image,\n mask: Image.Image,\n latents_size: tuple[int, int] = (64, 64),\n) -> tuple[Tensor, Tensor]:\n \"\"\"Set the inpainting conditions.\n\n Args:\n target_image: The target image to inpaint.\n mask: The mask to use for inpainting.\n latents_size: The size of the latents to use.\n\n Returns:\n The mask latents and the target image latents.\n \"\"\"\n target_image = target_image.convert(mode=\"RGB\")\n mask = mask.convert(mode=\"L\")\n\n mask_tensor = torch.tensor(data=np.array(object=mask).astype(dtype=np.float32) / 255.0).to(device=self.device)\n mask_tensor = (mask_tensor > 0.5).unsqueeze(dim=0).unsqueeze(dim=0).to(dtype=self.dtype)\n self.mask_latents = interpolate(x=mask_tensor, size=torch.Size(latents_size))\n\n init_image_tensor = image_to_tensor(image=target_image, device=self.device, dtype=self.dtype) * 2 - 1\n masked_init_image = init_image_tensor * (1 - mask_tensor)\n self.target_image_latents = self.lda.encode(x=masked_init_image)\n\n return self.mask_latents, self.target_image_latents\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.DDIM","title":"DDIM","text":"<pre><code>DDIM(\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>Solver</code></p> <p>Denoising Diffusion Implicit Model (DDIM) solver.</p> <p>See [arXiv:2010.02502] Denoising Diffusion Implicit Models for more details.</p> <p>Parameters:</p> Name Type Description Default <code>num_inference_steps</code> <code>int</code> <p>The number of inference steps to perform.</p> required <code>first_inference_step</code> <code>int</code> <p>The first inference step to perform.</p> <code>0</code> <code>params</code> <code>BaseSolverParams | None</code> <p>The common parameters for solvers.</p> <code>None</code> <code>device</code> <code>device | str</code> <p>The PyTorch device to use.</p> <code>'cpu'</code> <code>dtype</code> <code>dtype</code> <p>The PyTorch data type to use.</p> <code>float32</code> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/ddim.py</code> <pre><code>def __init__(\n self,\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n device: Device | str = \"cpu\",\n dtype: Dtype = torch.float32,\n) -> None:\n \"\"\"Initializes a new DDIM solver.\n\n Args:\n num_inference_steps: The number of inference steps to perform.\n first_inference_step: The first inference step to perform.\n params: The common parameters for solvers.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n if params and params.model_prediction_type not in (ModelPredictionType.NOISE, None):\n raise NotImplementedError\n if params and params.sde_variance != 0.0:\n raise NotImplementedError(\"DDIM does not support sde_variance != 0.0 yet\")\n\n super().__init__(\n num_inference_steps=num_inference_steps,\n first_inference_step=first_inference_step,\n params=params,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.DDPM","title":"DDPM","text":"<pre><code>DDPM(\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n device: device | str = \"cpu\",\n)\n</code></pre> <p> Bases: <code>Solver</code></p> <p>Denoising Diffusion Probabilistic Model (DDPM) solver.</p> Warning <p>Only used for training Latent Diffusion models. Cannot be called.</p> <p>See [arXiv:2006.11239] Denoising Diffusion Probabilistic Models for more details.</p> <p>Parameters:</p> Name Type Description Default <code>num_inference_steps</code> <code>int</code> <p>The number of inference steps to perform.</p> required <code>first_inference_step</code> <code>int</code> <p>The first inference step to perform.</p> <code>0</code> <code>params</code> <code>BaseSolverParams | None</code> <p>The common parameters for solvers.</p> <code>None</code> <code>device</code> <code>device | str</code> <p>The PyTorch device to use.</p> <code>'cpu'</code> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/ddpm.py</code> <pre><code>def __init__(\n self,\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n device: Device | str = \"cpu\",\n) -> None:\n \"\"\"Initializes a new DDPM solver.\n\n Args:\n num_inference_steps: The number of inference steps to perform.\n first_inference_step: The first inference step to perform.\n params: The common parameters for solvers.\n device: The PyTorch device to use.\n \"\"\"\n\n if params and params.model_prediction_type not in (ModelPredictionType.NOISE, None):\n raise NotImplementedError\n\n super().__init__(\n num_inference_steps=num_inference_steps,\n first_inference_step=first_inference_step,\n params=params,\n device=device,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.DPMSolver","title":"DPMSolver","text":"<pre><code>DPMSolver(\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n last_step_first_order: bool = False,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>Solver</code></p> <p>Diffusion probabilistic models (DPMs) solver.</p> <p>See [arXiv:2211.01095] DPM-Solver++: Fast Solver for Guided Sampling of Diffusion Probabilistic Models for more details.</p> Note <p>Regarding last_step_first_order: DPM-Solver++ is known to introduce artifacts when used with SDXL and few steps. This parameter is a way to mitigate that effect by using a first-order (Euler) update instead of a second-order update for the last step of the diffusion.</p> <p>Parameters:</p> Name Type Description Default <code>num_inference_steps</code> <code>int</code> <p>The number of inference steps to perform.</p> required <code>first_inference_step</code> <code>int</code> <p>The first inference step to perform.</p> <code>0</code> <code>params</code> <code>BaseSolverParams | None</code> <p>The common parameters for solvers.</p> <code>None</code> <code>last_step_first_order</code> <code>bool</code> <p>Use a first-order update for the last step.</p> <code>False</code> <code>device</code> <code>device | str</code> <p>The PyTorch device to use.</p> <code>'cpu'</code> <code>dtype</code> <code>dtype</code> <p>The PyTorch data type to use.</p> <code>float32</code> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/dpm.py</code> <pre><code>def __init__(\n self,\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n last_step_first_order: bool = False,\n device: torch.device | str = \"cpu\",\n dtype: torch.dtype = torch.float32,\n) -> None:\n \"\"\"Initializes a new DPM solver.\n\n Args:\n num_inference_steps: The number of inference steps to perform.\n first_inference_step: The first inference step to perform.\n params: The common parameters for solvers.\n last_step_first_order: Use a first-order update for the last step.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n if params and params.model_prediction_type not in (ModelPredictionType.NOISE, None):\n raise NotImplementedError\n if params and params.sde_variance not in (0.0, 1.0):\n raise NotImplementedError(\"DPMSolver only supports sde_variance=0.0 or 1.0\")\n\n super().__init__(\n num_inference_steps=num_inference_steps,\n first_inference_step=first_inference_step,\n params=params,\n device=device,\n dtype=torch.float64, # compute constants precisely\n )\n self.estimated_data = deque([torch.tensor([])] * 2, maxlen=2)\n self.last_step_first_order = last_step_first_order\n sigmas = self.noise_std / self.cumulative_scale_factors\n self.sigmas = self._rescale_sigmas(sigmas, self.params.sigma_schedule)\n sigma_min = sigmas[0:1] # corresponds to `final_sigmas_type=\"sigma_min\" in diffusers`\n self.sigmas = torch.cat([self.sigmas, sigma_min])\n self.cumulative_scale_factors, self.noise_std, self.signal_to_noise_ratios = self._solver_tensors_from_sigmas(\n self.sigmas\n )\n self.timesteps = self._timesteps_from_sigmas(sigmas)\n self.to(dtype=dtype)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.DPMSolver.dpm_solver_first_order_update","title":"dpm_solver_first_order_update","text":"<pre><code>dpm_solver_first_order_update(\n x: Tensor,\n noise: Tensor,\n step: int,\n sde_noise: Tensor | None = None,\n) -> Tensor\n</code></pre> <p>Applies a first-order backward Euler update to the input data <code>x</code>.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The input data.</p> required <code>noise</code> <code>Tensor</code> <p>The predicted noise.</p> required <code>step</code> <code>int</code> <p>The current step.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The denoised version of the input data <code>x</code>.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/dpm.py</code> <pre><code>def dpm_solver_first_order_update(\n self, x: torch.Tensor, noise: torch.Tensor, step: int, sde_noise: torch.Tensor | None = None\n) -> torch.Tensor:\n \"\"\"Applies a first-order backward Euler update to the input data `x`.\n\n Args:\n x: The input data.\n noise: The predicted noise.\n step: The current step.\n\n Returns:\n The denoised version of the input data `x`.\n \"\"\"\n current_ratio = self.signal_to_noise_ratios[step]\n next_ratio = self.signal_to_noise_ratios[step + 1]\n\n next_scale_factor = self.cumulative_scale_factors[step + 1]\n\n next_noise_std = self.noise_std[step + 1]\n current_noise_std = self.noise_std[step]\n\n ratio_delta = current_ratio - next_ratio\n\n if sde_noise is None:\n return (next_noise_std / current_noise_std) * x + (1.0 - torch.exp(ratio_delta)) * next_scale_factor * noise\n\n factor = 1.0 - torch.exp(2.0 * ratio_delta)\n return (\n (next_noise_std / current_noise_std) * torch.exp(ratio_delta) * x\n + next_scale_factor * factor * noise\n + next_noise_std * safe_sqrt(factor) * sde_noise\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.DPMSolver.multistep_dpm_solver_second_order_update","title":"multistep_dpm_solver_second_order_update","text":"<pre><code>multistep_dpm_solver_second_order_update(\n x: Tensor, step: int, sde_noise: Tensor | None = None\n) -> Tensor\n</code></pre> <p>Applies a second-order backward Euler update to the input data <code>x</code>.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The input data.</p> required <code>step</code> <code>int</code> <p>The current step.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The denoised version of the input data <code>x</code>.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/dpm.py</code> <pre><code>def multistep_dpm_solver_second_order_update(\n self, x: torch.Tensor, step: int, sde_noise: torch.Tensor | None = None\n) -> torch.Tensor:\n \"\"\"Applies a second-order backward Euler update to the input data `x`.\n\n Args:\n x: The input data.\n step: The current step.\n\n Returns:\n The denoised version of the input data `x`.\n \"\"\"\n current_data_estimation = self.estimated_data[-1]\n previous_data_estimation = self.estimated_data[-2]\n\n next_ratio = self.signal_to_noise_ratios[step + 1]\n current_ratio = self.signal_to_noise_ratios[step]\n previous_ratio = self.signal_to_noise_ratios[step - 1]\n\n next_scale_factor = self.cumulative_scale_factors[step + 1]\n next_noise_std = self.noise_std[step + 1]\n current_noise_std = self.noise_std[step]\n\n estimation_delta = (current_data_estimation - previous_data_estimation) / (\n (current_ratio - previous_ratio) / (next_ratio - current_ratio)\n )\n ratio_delta = current_ratio - next_ratio\n\n if sde_noise is None:\n factor = 1.0 - torch.exp(ratio_delta)\n return (\n (next_noise_std / current_noise_std) * x\n + next_scale_factor * factor * current_data_estimation\n + 0.5 * next_scale_factor * factor * estimation_delta\n )\n\n factor = 1.0 - torch.exp(2.0 * ratio_delta)\n return (\n (next_noise_std / current_noise_std) * torch.exp(ratio_delta) * x\n + next_scale_factor * factor * current_data_estimation\n + 0.5 * next_scale_factor * factor * estimation_delta\n + next_noise_std * safe_sqrt(factor) * sde_noise\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.DPMSolver.rebuild","title":"rebuild","text":"<pre><code>rebuild(\n num_inference_steps: int | None,\n first_inference_step: int | None = None,\n) -> DPMSolver\n</code></pre> <p>Rebuilds the solver with new parameters.</p> <p>Parameters:</p> Name Type Description Default <code>num_inference_steps</code> <code>int | None</code> <p>The number of inference steps.</p> required <code>first_inference_step</code> <code>int | None</code> <p>The first inference step.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/dpm.py</code> <pre><code>def rebuild(\n self: \"DPMSolver\",\n num_inference_steps: int | None,\n first_inference_step: int | None = None,\n) -> \"DPMSolver\":\n \"\"\"Rebuilds the solver with new parameters.\n\n Args:\n num_inference_steps: The number of inference steps.\n first_inference_step: The first inference step.\n \"\"\"\n r = super().rebuild(\n num_inference_steps=num_inference_steps,\n first_inference_step=first_inference_step,\n )\n r.last_step_first_order = self.last_step_first_order\n return r\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.DPMSolver.remove_noise","title":"remove_noise","text":"<pre><code>remove_noise(x: Tensor, noise: Tensor, step: int) -> Tensor\n</code></pre> <p>Remove noise from the input tensor using the current step of the diffusion process.</p> <p>See <code>Solver.remove_noise</code> for more details.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/dpm.py</code> <pre><code>def remove_noise(self, x: torch.Tensor, noise: torch.Tensor, step: int) -> torch.Tensor:\n \"\"\"Remove noise from the input tensor using the current step of the diffusion process.\n\n See [`Solver.remove_noise`][refiners.foundationals.latent_diffusion.solvers.solver.Solver.remove_noise] for more details.\n \"\"\"\n cumulative_scale_factors = self.cumulative_scale_factors[step]\n noise_stds = self.noise_std[step]\n denoised_x = (x - noise_stds * noise) / cumulative_scale_factors\n return denoised_x\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Euler","title":"Euler","text":"<pre><code>Euler(\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>Solver</code></p> <p>Euler solver.</p> <p>See [arXiv:2206.00364] Elucidating the Design Space of Diffusion-Based Generative Models for more details.</p> <p>Parameters:</p> Name Type Description Default <code>num_inference_steps</code> <code>int</code> <p>The number of inference steps to perform.</p> required <code>first_inference_step</code> <code>int</code> <p>The first inference step to perform.</p> <code>0</code> <code>params</code> <code>BaseSolverParams | None</code> <p>The common parameters for solvers.</p> <code>None</code> <code>device</code> <code>device | str</code> <p>The PyTorch device to use.</p> <code>'cpu'</code> <code>dtype</code> <code>dtype</code> <p>The PyTorch data type to use.</p> <code>float32</code> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/euler.py</code> <pre><code>def __init__(\n self,\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n device: Device | str = \"cpu\",\n dtype: Dtype = torch.float32,\n):\n \"\"\"Initializes a new Euler solver.\n\n Args:\n num_inference_steps: The number of inference steps to perform.\n first_inference_step: The first inference step to perform.\n params: The common parameters for solvers.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n if params and params.noise_schedule not in (NoiseSchedule.QUADRATIC, None):\n raise NotImplementedError\n if params and params.sde_variance != 0.0:\n raise NotImplementedError(\"Euler does not support sde_variance != 0.0 yet\")\n\n super().__init__(\n num_inference_steps=num_inference_steps,\n first_inference_step=first_inference_step,\n params=params,\n device=device,\n dtype=dtype,\n )\n self.sigmas = self._generate_sigmas()\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Euler.init_noise_sigma","title":"init_noise_sigma <code>property</code>","text":"<pre><code>init_noise_sigma: Tensor\n</code></pre> <p>The initial noise sigma.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Euler.scale_model_input","title":"scale_model_input","text":"<pre><code>scale_model_input(x: Tensor, step: int) -> Tensor\n</code></pre> <p>Scales the model input according to the current step.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The model input.</p> required <code>step</code> <code>int</code> <p>The current step. This method is called with <code>step=-1</code> in <code>init_latents</code>.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The scaled model input.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/euler.py</code> <pre><code>def scale_model_input(self, x: Tensor, step: int) -> Tensor:\n \"\"\"Scales the model input according to the current step.\n\n Args:\n x: The model input.\n step: The current step. This method is called with `step=-1` in `init_latents`.\n\n Returns:\n The scaled model input.\n \"\"\"\n\n if step == -1:\n return x * self.init_noise_sigma\n\n sigma = self.sigmas[step]\n return x / ((sigma**2 + 1) ** 0.5)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.FrankenSolver","title":"FrankenSolver","text":"<pre><code>FrankenSolver(\n get_diffusers_scheduler: Callable[[], SchedulerLike],\n num_inference_steps: int,\n first_inference_step: int = 0,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n **kwargs: Any\n)\n</code></pre> <p> Bases: <code>Solver</code></p> <p>Lets you use Diffusers Schedulers as Refiners Solvers.</p> For instance <pre><code>from diffusers import EulerDiscreteScheduler\nfrom refiners.foundationals.latent_diffusion.solvers import FrankenSolver\n\nscheduler = EulerDiscreteScheduler(...)\nsolver = FrankenSolver(lambda: scheduler, num_inference_steps=steps)\n</code></pre> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/franken.py</code> <pre><code>def __init__(\n self,\n get_diffusers_scheduler: Callable[[], SchedulerLike],\n num_inference_steps: int,\n first_inference_step: int = 0,\n device: Device | str = \"cpu\",\n dtype: DType = torch.float32,\n **kwargs: Any, # for typing, ignored\n) -> None:\n self.get_diffusers_scheduler = get_diffusers_scheduler\n self.diffusers_scheduler = self.get_diffusers_scheduler()\n self.diffusers_scheduler.set_timesteps(num_inference_steps)\n super().__init__(\n num_inference_steps=num_inference_steps,\n first_inference_step=first_inference_step,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.LCMSolver","title":"LCMSolver","text":"<pre><code>LCMSolver(\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n num_orig_steps: int = 50,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>Solver</code></p> <p>Latent Consistency Model solver.</p> <p>This solver is designed for use either with a specific base model or a specific LoRA.</p> <p>See [arXiv:2310.04378] Latent Consistency Models: Synthesizing High-Resolution Images with Few-Step Inference for details.</p> <p>Parameters:</p> Name Type Description Default <code>num_inference_steps</code> <code>int</code> <p>The number of inference steps to perform.</p> required <code>first_inference_step</code> <code>int</code> <p>The first inference step to perform.</p> <code>0</code> <code>params</code> <code>BaseSolverParams | None</code> <p>The common parameters for solvers.</p> <code>None</code> <code>num_orig_steps</code> <code>int</code> <p>The number of inference steps of the emulated DPM solver.</p> <code>50</code> <code>device</code> <code>device | str</code> <p>The PyTorch device to use.</p> <code>'cpu'</code> <code>dtype</code> <code>dtype</code> <p>The PyTorch data type to use.</p> <code>float32</code> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/lcm.py</code> <pre><code>def __init__(\n self,\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n num_orig_steps: int = 50,\n device: torch.device | str = \"cpu\",\n dtype: torch.dtype = torch.float32,\n):\n \"\"\"Initializes a new LCM solver.\n\n Args:\n num_inference_steps: The number of inference steps to perform.\n first_inference_step: The first inference step to perform.\n params: The common parameters for solvers.\n num_orig_steps: The number of inference steps of the emulated DPM solver.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n \"\"\"\n\n assert (\n num_orig_steps >= num_inference_steps\n ), f\"num_orig_steps ({num_orig_steps}) < num_inference_steps ({num_inference_steps})\"\n\n params = self.resolve_params(params)\n if params.model_prediction_type != ModelPredictionType.NOISE:\n raise NotImplementedError\n\n self._dpm = [\n DPMSolver(\n num_inference_steps=num_orig_steps,\n params=SolverParams(\n num_train_timesteps=params.num_train_timesteps,\n timesteps_spacing=params.timesteps_spacing,\n ),\n device=device,\n dtype=dtype,\n )\n ]\n super().__init__(\n num_inference_steps=num_inference_steps,\n first_inference_step=first_inference_step,\n params=params,\n device=device,\n dtype=dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.ModelPredictionType","title":"ModelPredictionType","text":"<p> Bases: <code>str</code>, <code>Enum</code></p> <p>An enumeration of possible outputs of the model.</p> <p>Attributes:</p> Name Type Description <code>NOISE</code> <p>The model predicts the noise (epsilon).</p> <code>SAMPLE</code> <p>The model predicts the denoised sample (x0).</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.NoiseSchedule","title":"NoiseSchedule","text":"<p> Bases: <code>str</code>, <code>Enum</code></p> <p>An enumeration of schedules used to sample the noise.</p> <p>Attributes:</p> Name Type Description <code>UNIFORM</code> <p>A uniform noise schedule.</p> <code>QUADRATIC</code> <p>A quadratic noise schedule. Corresponds to \"Stable Diffusion\" in [arXiv:2305.08891] Common Diffusion Noise Schedules and Sample Steps are Flawed table 1.</p> <code>KARRAS</code> <p>See [arXiv:2206.00364] Elucidating the Design Space of Diffusion-Based Generative Models, Equation 5</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver","title":"Solver","text":"<pre><code>Solver(\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>Module</code>, <code>ABC</code></p> <p>The base class for creating a diffusion model solver.</p> <p>Solvers create a sequence of noise and scaling factors used in the diffusion process, which gradually transforms the original data distribution into a Gaussian one.</p> <p>This process is described using several parameters such as initial and final diffusion rates, and is encapsulated into a <code>__call__</code> method that applies a step of the diffusion process.</p> <p>Attributes:</p> Name Type Description <code>params</code> <code>ResolvedSolverParams</code> <p>The common parameters for solvers. See <code>SolverParams</code>.</p> <code>num_inference_steps</code> <p>The number of inference steps to perform.</p> <code>first_inference_step</code> <p>The step to start the inference process from.</p> <code>scale_factors</code> <p>The scale factors used to denoise the input. These are called \"betas\" in other implementations, and <code>1 - scale_factors</code> is called \"alphas\".</p> <code>cumulative_scale_factors</code> <p>The cumulative scale factors used to denoise the input. These are called \"alpha_t\" in other implementations.</p> <code>noise_std</code> <p>The standard deviation of the noise used to denoise the input. This is called \"sigma_t\" in other implementations.</p> <code>signal_to_noise_ratios</code> <p>The signal-to-noise ratios used to denoise the input. This is called \"lambda_t\" in other implementations.</p> <p>Parameters:</p> Name Type Description Default <code>num_inference_steps</code> <code>int</code> <p>The number of inference steps to perform.</p> required <code>first_inference_step</code> <code>int</code> <p>The first inference step to perform.</p> <code>0</code> <code>params</code> <code>BaseSolverParams | None</code> <p>The common parameters for solvers.</p> <code>None</code> <code>device</code> <code>device | str</code> <p>The PyTorch device to use for the solver's tensors.</p> <code>'cpu'</code> <code>dtype</code> <code>dtype</code> <p>The PyTorch data type to use for the solver's tensors.</p> <code>float32</code> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/solver.py</code> <pre><code>def __init__(\n self,\n num_inference_steps: int,\n first_inference_step: int = 0,\n params: BaseSolverParams | None = None,\n device: Device | str = \"cpu\",\n dtype: DType = torch.float32,\n) -> None:\n \"\"\"Initializes a new `Solver` instance.\n\n Args:\n num_inference_steps: The number of inference steps to perform.\n first_inference_step: The first inference step to perform.\n params: The common parameters for solvers.\n device: The PyTorch device to use for the solver's tensors.\n dtype: The PyTorch data type to use for the solver's tensors.\n \"\"\"\n super().__init__()\n\n self.num_inference_steps = num_inference_steps\n self.first_inference_step = first_inference_step\n self.params = self.resolve_params(params)\n\n self.scale_factors = self.sample_noise_schedule()\n self.cumulative_scale_factors = torch.sqrt(self.scale_factors.cumprod(dim=0))\n self.noise_std = torch.sqrt(1.0 - self.scale_factors.cumprod(dim=0))\n self.signal_to_noise_ratios = torch.log(self.cumulative_scale_factors) - torch.log(self.noise_std)\n self.timesteps = self._generate_timesteps()\n\n self.to(device=device, dtype=dtype)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.all_steps","title":"all_steps <code>property</code>","text":"<pre><code>all_steps: list[int]\n</code></pre> <p>Return a list of all inference steps.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.device","title":"device <code>property</code> <code>writable</code>","text":"<pre><code>device: device\n</code></pre> <p>The PyTorch device used for the solver's tensors.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.dtype","title":"dtype <code>property</code> <code>writable</code>","text":"<pre><code>dtype: dtype\n</code></pre> <p>The PyTorch data type used for the solver's tensors.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.inference_steps","title":"inference_steps <code>property</code>","text":"<pre><code>inference_steps: list[int]\n</code></pre> <p>Return a list of inference steps to perform.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.add_noise","title":"add_noise","text":"<pre><code>add_noise(\n x: Tensor, noise: Tensor, step: int | list[int]\n) -> Tensor\n</code></pre> <p>Add noise to the input tensor using the solver's parameters.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The input tensor to add noise to.</p> required <code>noise</code> <code>Tensor</code> <p>The noise tensor to add to the input tensor.</p> required <code>step</code> <code>int | list[int]</code> <p>The current step(s) of the diffusion process.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The input tensor with added noise.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/solver.py</code> <pre><code>def add_noise(\n self,\n x: Tensor,\n noise: Tensor,\n step: int | list[int],\n) -> Tensor:\n \"\"\"Add noise to the input tensor using the solver's parameters.\n\n Args:\n x: The input tensor to add noise to.\n noise: The noise tensor to add to the input tensor.\n step: The current step(s) of the diffusion process.\n\n Returns:\n The input tensor with added noise.\n \"\"\"\n if isinstance(step, list):\n assert len(x) == len(noise) == len(step), \"x, noise, and step must have the same length\"\n return torch.stack(\n tensors=[\n self._add_noise(\n x=x[i],\n noise=noise[i],\n step=step[i],\n )\n for i in range(x.shape[0])\n ],\n dim=0,\n )\n\n return self._add_noise(x=x, noise=noise, step=step)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.generate_timesteps","title":"generate_timesteps <code>staticmethod</code>","text":"<pre><code>generate_timesteps(\n spacing: TimestepSpacing,\n num_inference_steps: int,\n num_train_timesteps: int = 1000,\n offset: int = 0,\n) -> Tensor\n</code></pre> <p>Generate a tensor of timesteps according to a given spacing.</p> <p>Parameters:</p> Name Type Description Default <code>spacing</code> <code>TimestepSpacing</code> <p>The spacing to use for the timesteps.</p> required <code>num_inference_steps</code> <code>int</code> <p>The number of inference steps to perform.</p> required <code>num_train_timesteps</code> <code>int</code> <p>The number of timesteps used to train the diffusion process.</p> <code>1000</code> <code>offset</code> <code>int</code> <p>The offset to use for the timesteps.</p> <code>0</code> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/solver.py</code> <pre><code>@staticmethod\ndef generate_timesteps(\n spacing: TimestepSpacing,\n num_inference_steps: int,\n num_train_timesteps: int = 1000,\n offset: int = 0,\n) -> Tensor:\n \"\"\"Generate a tensor of timesteps according to a given spacing.\n\n Args:\n spacing: The spacing to use for the timesteps.\n num_inference_steps: The number of inference steps to perform.\n num_train_timesteps: The number of timesteps used to train the diffusion process.\n offset: The offset to use for the timesteps.\n \"\"\"\n max_timestep = num_train_timesteps - 1 + offset\n match spacing:\n case TimestepSpacing.LINSPACE:\n return torch.tensor(np.linspace(offset, max_timestep, num_inference_steps), dtype=torch.float32).flip(0)\n case TimestepSpacing.LINSPACE_ROUNDED:\n return torch.tensor(np.linspace(offset, max_timestep, num_inference_steps).round().astype(int)).flip(0)\n case TimestepSpacing.LEADING:\n step_ratio = num_train_timesteps // num_inference_steps\n return (torch.arange(0, num_inference_steps, 1) * step_ratio + offset).flip(0)\n case TimestepSpacing.TRAILING:\n step_ratio = num_train_timesteps // num_inference_steps\n max_timestep = num_train_timesteps - 1 + offset\n return torch.arange(max_timestep, offset, -step_ratio)\n case TimestepSpacing.CUSTOM:\n raise RuntimeError(\"generate_timesteps called with custom spacing\")\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.rebuild","title":"rebuild","text":"<pre><code>rebuild(\n num_inference_steps: int | None,\n first_inference_step: int | None = None,\n) -> T\n</code></pre> <p>Rebuild the solver with new parameters.</p> <p>Parameters:</p> Name Type Description Default <code>num_inference_steps</code> <code>int | None</code> <p>The number of inference steps to perform.</p> required <code>first_inference_step</code> <code>int | None</code> <p>The first inference step to perform.</p> <code>None</code> <p>Returns:</p> Type Description <code>T</code> <p>A new solver instance with the specified parameters.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/solver.py</code> <pre><code>def rebuild(self: T, num_inference_steps: int | None, first_inference_step: int | None = None) -> T:\n \"\"\"Rebuild the solver with new parameters.\n\n Args:\n num_inference_steps: The number of inference steps to perform.\n first_inference_step: The first inference step to perform.\n\n Returns:\n A new solver instance with the specified parameters.\n \"\"\"\n return self.__class__(\n num_inference_steps=self.num_inference_steps if num_inference_steps is None else num_inference_steps,\n first_inference_step=self.first_inference_step if first_inference_step is None else first_inference_step,\n params=dataclasses.replace(self.params),\n device=self.device,\n dtype=self.dtype,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.remove_noise","title":"remove_noise","text":"<pre><code>remove_noise(x: Tensor, noise: Tensor, step: int) -> Tensor\n</code></pre> <p>Remove noise from the input tensor using the current step of the diffusion process.</p> Note <p>See [arXiv:2006.11239] Denoising Diffusion Probabilistic Models, Equation 15 and [arXiv:2210.00939] Improving Sample Quality of Diffusion Models Using Self-Attention Guidance.</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The input tensor to remove noise from.</p> required <code>noise</code> <code>Tensor</code> <p>The noise tensor to remove from the input tensor.</p> required <code>step</code> <code>int</code> <p>The current step of the diffusion process.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The denoised input tensor.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/solver.py</code> <pre><code>def remove_noise(self, x: Tensor, noise: Tensor, step: int) -> Tensor:\n \"\"\"Remove noise from the input tensor using the current step of the diffusion process.\n\n Note:\n See [[arXiv:2006.11239] Denoising Diffusion Probabilistic Models, Equation 15](https://arxiv.org/abs/2006.11239)\n and [[arXiv:2210.00939] Improving Sample Quality of Diffusion Models Using Self-Attention Guidance](https://arxiv.org/abs/2210.00939).\n\n Args:\n x: The input tensor to remove noise from.\n noise: The noise tensor to remove from the input tensor.\n step: The current step of the diffusion process.\n\n Returns:\n The denoised input tensor.\n \"\"\"\n timestep = self.timesteps[step]\n cumulative_scale_factors = self.cumulative_scale_factors[timestep]\n noise_stds = self.noise_std[timestep]\n denoised_x = (x - noise_stds * noise) / cumulative_scale_factors\n return denoised_x\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.sample_noise_schedule","title":"sample_noise_schedule","text":"<pre><code>sample_noise_schedule() -> Tensor\n</code></pre> <p>Sample the noise schedule.</p> <p>Returns:</p> Type Description <code>Tensor</code> <p>A tensor representing the noise schedule.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/solver.py</code> <pre><code>def sample_noise_schedule(self) -> Tensor:\n \"\"\"Sample the noise schedule.\n\n Returns:\n A tensor representing the noise schedule.\n \"\"\"\n match self.params.noise_schedule:\n case NoiseSchedule.UNIFORM:\n return 1 - self.sample_power_distribution(1)\n case NoiseSchedule.QUADRATIC:\n return 1 - self.sample_power_distribution(2)\n case NoiseSchedule.KARRAS:\n return 1 - self.sample_power_distribution(7)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.sample_power_distribution","title":"sample_power_distribution","text":"<pre><code>sample_power_distribution(power: float = 2) -> Tensor\n</code></pre> <p>Sample a power distribution.</p> <p>Parameters:</p> Name Type Description Default <code>power</code> <code>float</code> <p>The power to use for the distribution.</p> <code>2</code> <p>Returns:</p> Type Description <code>Tensor</code> <p>A tensor representing the power distribution between the initial and final diffusion rates of the solver.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/solver.py</code> <pre><code>def sample_power_distribution(self, power: float = 2, /) -> Tensor:\n \"\"\"Sample a power distribution.\n\n Args:\n power: The power to use for the distribution.\n\n Returns:\n A tensor representing the power distribution between the initial and final diffusion rates of the solver.\n \"\"\"\n return (\n torch.linspace(\n start=self.params.initial_diffusion_rate ** (1 / power),\n end=self.params.final_diffusion_rate ** (1 / power),\n steps=self.params.num_train_timesteps,\n )\n ** power\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.scale_model_input","title":"scale_model_input","text":"<pre><code>scale_model_input(x: Tensor, step: int) -> Tensor\n</code></pre> <p>Scale the model's input according to the current timestep.</p> Note <p>This method should only be overridden by solvers that need to scale the input according to the current timestep.</p> <p>By default, this method does not scale the input. (scale=1)</p> <p>Parameters:</p> Name Type Description Default <code>x</code> <code>Tensor</code> <p>The input tensor to scale.</p> required <code>step</code> <code>int</code> <p>The current step of the diffusion process.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The scaled input tensor.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/solver.py</code> <pre><code>def scale_model_input(self, x: Tensor, step: int) -> Tensor:\n \"\"\"Scale the model's input according to the current timestep.\n\n Note:\n This method should only be overridden by solvers that\n need to scale the input according to the current timestep.\n\n By default, this method does not scale the input.\n (scale=1)\n\n Args:\n x: The input tensor to scale.\n step: The current step of the diffusion process.\n\n Returns:\n The scaled input tensor.\n \"\"\"\n return x\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.Solver.to","title":"to","text":"<pre><code>to(\n device: device | str | None = None,\n dtype: dtype | None = None,\n) -> Solver\n</code></pre> <p>Move the solver to the specified device and data type.</p> <p>Parameters:</p> Name Type Description Default <code>device</code> <code>device | str | None</code> <p>The PyTorch device to move the solver to.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>The PyTorch data type to move the solver to.</p> <code>None</code> <p>Returns:</p> Type Description <code>Solver</code> <p>The solver instance, moved to the specified device and data type.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/solvers/solver.py</code> <pre><code>def to(self, device: Device | str | None = None, dtype: DType | None = None) -> \"Solver\":\n \"\"\"Move the solver to the specified device and data type.\n\n Args:\n device: The PyTorch device to move the solver to.\n dtype: The PyTorch data type to move the solver to.\n\n Returns:\n The solver instance, moved to the specified device and data type.\n \"\"\"\n super().to(device=device, dtype=dtype)\n for name, attr in [(name, attr) for name, attr in self.__dict__.items() if isinstance(attr, Tensor)]:\n match name:\n case \"timesteps\":\n setattr(self, name, attr.to(device=device))\n case _:\n setattr(self, name, attr.to(device=device, dtype=dtype))\n return self\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.SolverParams","title":"SolverParams <code>dataclass</code>","text":"<pre><code>SolverParams(\n *,\n num_train_timesteps: int | None = None,\n timesteps_spacing: TimestepSpacing | None = None,\n timesteps_offset: int | None = None,\n initial_diffusion_rate: float | None = None,\n final_diffusion_rate: float | None = None,\n noise_schedule: NoiseSchedule | None = None,\n sigma_schedule: NoiseSchedule | None = None,\n model_prediction_type: (\n ModelPredictionType | None\n ) = None,\n sde_variance: float = 0.0\n)\n</code></pre> <p> Bases: <code>BaseSolverParams</code></p> <p>Common parameters for solvers.</p> <p>Parameters:</p> Name Type Description Default <code>num_train_timesteps</code> <code>int | None</code> <p>The number of timesteps used to train the diffusion process.</p> <code>None</code> <code>timesteps_spacing</code> <code>TimestepSpacing | None</code> <p>The spacing to use for the timesteps.</p> <code>None</code> <code>timesteps_offset</code> <code>int | None</code> <p>The offset to use for the timesteps.</p> <code>None</code> <code>initial_diffusion_rate</code> <code>float | None</code> <p>The initial diffusion rate used to sample the noise schedule.</p> <code>None</code> <code>final_diffusion_rate</code> <code>float | None</code> <p>The final diffusion rate used to sample the noise schedule.</p> <code>None</code> <code>noise_schedule</code> <code>NoiseSchedule | None</code> <p>The noise schedule used to sample the noise schedule.</p> <code>None</code> <code>model_prediction_type</code> <code>ModelPredictionType | None</code> <p>Defines what the model predicts.</p> <code>None</code>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.solvers.TimestepSpacing","title":"TimestepSpacing","text":"<p> Bases: <code>str</code>, <code>Enum</code></p> <p>An enumeration of methods to space the timesteps.</p> <p>See [arXiv:2305.08891] Common Diffusion Noise Schedules and Sample Steps are Flawed table 2.</p> <p>Attributes:</p> Name Type Description <code>LINSPACE</code> <p>Sample N steps with linear interpolation, return a floating-point tensor.</p> <code>LINSPACE_ROUNDED</code> <p>Same as LINSPACE but return an integer tensor with rounded timesteps.</p> <code>LEADING</code> <p>Sample N+1 steps, do not include the last timestep (i.e. bad - non-zero SNR). Used in DDIM, with a mitigation for that issue.</p> <code>TRAILING</code> <p>Sample N+1 steps, do not include the first timestep.</p> <code>CUSTOM</code> <p>Use custom timespacing in solver (override <code>_generate_timesteps</code>, see DPM).</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager","title":"SDLoraManager","text":"<pre><code>SDLoraManager(target: LatentDiffusionModel)\n</code></pre> <p>Manage LoRAs for a Stable Diffusion model.</p> Note <p>In the context of SDLoraManager, a \"LoRA\" is a set of \"LoRA layers\" that can be attached to a target model.</p> <p>Parameters:</p> Name Type Description Default <code>target</code> <code>LatentDiffusionModel</code> <p>The target model to manage the LoRAs for.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def __init__(\n self,\n target: LatentDiffusionModel,\n) -> None:\n \"\"\"Initialize the LoRA manager.\n\n Args:\n target: The target model to manage the LoRAs for.\n \"\"\"\n self.target = target\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.clip_text_encoder","title":"clip_text_encoder <code>property</code>","text":"<pre><code>clip_text_encoder: Chain\n</code></pre> <p>The Stable Diffusion's text encoder.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.lora_adapters","title":"lora_adapters <code>property</code>","text":"<pre><code>lora_adapters: list[LoraAdapter]\n</code></pre> <p>List of all the LoraAdapters managed by the SDLoraManager.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.loras","title":"loras <code>property</code>","text":"<pre><code>loras: list[Lora[Any]]\n</code></pre> <p>List of all the LoRA layers managed by the SDLoraManager.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.names","title":"names <code>property</code>","text":"<pre><code>names: list[str]\n</code></pre> <p>List of all the LoRA names managed the SDLoraManager</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.scales","title":"scales <code>property</code>","text":"<pre><code>scales: dict[str, float]\n</code></pre> <p>The scales of all the LoRAs managed by the SDLoraManager.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.unet","title":"unet <code>property</code>","text":"<pre><code>unet: Chain\n</code></pre> <p>The Stable Diffusion's U-Net model.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.add_loras","title":"add_loras","text":"<pre><code>add_loras(\n name: str,\n /,\n tensors: dict[str, Tensor],\n scale: float = 1.0,\n unet_inclusions: list[str] | None = None,\n unet_exclusions: list[str] | None = None,\n unet_preprocess: dict[str, str] | None = None,\n text_encoder_inclusions: list[str] | None = None,\n text_encoder_exclusions: list[str] | None = None,\n) -> None\n</code></pre> <p>Load a single LoRA from a <code>state_dict</code>.</p> Warning <p>This method expects the keys of the <code>state_dict</code> to be in the commonly found formats on CivitAI's hub.</p> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the LoRA.</p> required <code>tensors</code> <code>dict[str, Tensor]</code> <p>The <code>state_dict</code> of the LoRA to load.</p> required <code>scale</code> <code>float</code> <p>The scale to use for the LoRA.</p> <code>1.0</code> <code>unet_inclusions</code> <code>list[str] | None</code> <p>A list of layer names, only layers with such a layer in their ancestors will be considered when patching the UNet.</p> <code>None</code> <code>unet_exclusions</code> <code>list[str] | None</code> <p>A list of layer names, layers with such a layer in their ancestors will not be considered when patching the UNet. If this is <code>None</code> then it defaults to <code>[\"TimestepEncoder\"]</code>.</p> <code>None</code> <code>unet_preprocess</code> <code>dict[str, str] | None</code> <p>A map between parts of state dict keys and layer names. This is used to attach some keys to specific parts of the UNet. You should leave it set to <code>None</code> (it has a default value), otherwise read the source code to understand how it works.</p> <code>None</code> <code>text_encoder_inclusions</code> <code>list[str] | None</code> <p>A list of layer names, only layers with such a layer in their ancestors will be considered when patching the text encoder.</p> <code>None</code> <code>text_encoder_exclusions</code> <code>list[str] | None</code> <p>A list of layer names, layers with such a layer in their ancestors will not be considered when patching the text encoder.</p> <code>None</code> <p>Raises:</p> Type Description <code>AssertionError</code> <p>If the Manager already has a LoRA with the same name.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def add_loras(\n self,\n name: str,\n /,\n tensors: dict[str, Tensor],\n scale: float = 1.0,\n unet_inclusions: list[str] | None = None,\n unet_exclusions: list[str] | None = None,\n unet_preprocess: dict[str, str] | None = None,\n text_encoder_inclusions: list[str] | None = None,\n text_encoder_exclusions: list[str] | None = None,\n) -> None:\n \"\"\"Load a single LoRA from a `state_dict`.\n\n Warning:\n This method expects the keys of the `state_dict` to be in the commonly found formats on CivitAI's hub.\n\n Args:\n name: The name of the LoRA.\n tensors: The `state_dict` of the LoRA to load.\n scale: The scale to use for the LoRA.\n unet_inclusions: A list of layer names, only layers with such a layer\n in their ancestors will be considered when patching the UNet.\n unet_exclusions: A list of layer names, layers with such a layer in\n their ancestors will not be considered when patching the UNet.\n If this is `None` then it defaults to `[\"TimestepEncoder\"]`.\n unet_preprocess: A map between parts of state dict keys and layer names.\n This is used to attach some keys to specific parts of the UNet.\n You should leave it set to `None` (it has a default value),\n otherwise read the source code to understand how it works.\n text_encoder_inclusions: A list of layer names, only layers with such a layer\n in their ancestors will be considered when patching the text encoder.\n text_encoder_exclusions: A list of layer names, layers with such a layer in\n their ancestors will not be considered when patching the text encoder.\n\n Raises:\n AssertionError: If the Manager already has a LoRA with the same name.\n \"\"\"\n assert name not in self.names, f\"LoRA {name} already exists\"\n\n # load LoRA the state_dict\n loras = Lora.from_dict(\n name,\n state_dict={\n key: value.to(\n device=self.target.device,\n dtype=self.target.dtype,\n )\n for key, value in tensors.items()\n },\n )\n # sort all the LoRA's keys using the `sort_keys` method\n loras = {key: loras[key] for key in sorted(loras.keys(), key=SDLoraManager.sort_keys)}\n\n # if no key contains \"unet\" or \"text\", assume all keys are for the unet\n if all(\"unet\" not in key and \"text\" not in key for key in loras.keys()):\n loras = {f\"unet_{key}\": value for key, value in loras.items()}\n\n # attach the LoRA to the target\n self.add_loras_to_unet(loras, include=unet_inclusions, exclude=unet_exclusions, preprocess=unet_preprocess)\n self.add_loras_to_text_encoder(loras, include=text_encoder_inclusions, exclude=text_encoder_exclusions)\n\n # set the scale of the LoRA\n self.set_scale(name, scale)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.add_loras_to_text_encoder","title":"add_loras_to_text_encoder","text":"<pre><code>add_loras_to_text_encoder(\n loras: dict[str, Lora[Any]],\n /,\n include: list[str] | None = None,\n exclude: list[str] | None = None,\n debug_map: list[tuple[str, str]] | None = None,\n) -> None\n</code></pre> <p>Add multiple LoRAs to the text encoder. See <code>add_loras</code> for details about arguments.</p> <p>Parameters:</p> Name Type Description Default <code>loras</code> <code>dict[str, Lora[Any]]</code> <p>The dictionary of LoRAs to add to the text encoder. (keys are the names of the LoRAs, values are the LoRAs to add to the text encoder)</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def add_loras_to_text_encoder(\n self,\n loras: dict[str, Lora[Any]],\n /,\n include: list[str] | None = None,\n exclude: list[str] | None = None,\n debug_map: list[tuple[str, str]] | None = None,\n) -> None:\n \"\"\"Add multiple LoRAs to the text encoder. See `add_loras` for details about arguments.\n\n Args:\n loras: The dictionary of LoRAs to add to the text encoder.\n (keys are the names of the LoRAs, values are the LoRAs to add to the text encoder)\n \"\"\"\n text_encoder_loras = {key: loras[key] for key in loras.keys() if \"text\" in key}\n auto_attach_loras(\n text_encoder_loras,\n self.clip_text_encoder,\n exclude=exclude,\n include=include,\n debug_map=debug_map,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.add_loras_to_unet","title":"add_loras_to_unet","text":"<pre><code>add_loras_to_unet(\n loras: dict[str, Lora[Any]],\n /,\n include: list[str] | None = None,\n exclude: list[str] | None = None,\n preprocess: dict[str, str] | None = None,\n debug_map: list[tuple[str, str]] | None = None,\n) -> None\n</code></pre> <p>Add multiple LoRAs to the U-Net. See <code>add_loras</code> for details about arguments.</p> <p>Parameters:</p> Name Type Description Default <code>loras</code> <code>dict[str, Lora[Any]]</code> <p>The dictionary of LoRAs to add to the U-Net. (keys are the names of the LoRAs, values are the LoRAs to add to the U-Net)</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def add_loras_to_unet(\n self,\n loras: dict[str, Lora[Any]],\n /,\n include: list[str] | None = None,\n exclude: list[str] | None = None,\n preprocess: dict[str, str] | None = None,\n debug_map: list[tuple[str, str]] | None = None,\n) -> None:\n \"\"\"Add multiple LoRAs to the U-Net. See `add_loras` for details about arguments.\n\n Args:\n loras: The dictionary of LoRAs to add to the U-Net.\n (keys are the names of the LoRAs, values are the LoRAs to add to the U-Net)\n \"\"\"\n unet_loras = {key: loras[key] for key in loras.keys() if \"unet\" in key}\n\n if exclude is None:\n exclude = [\"TimestepEncoder\"]\n\n if preprocess is None:\n preprocess = {\n \"res\": \"ResidualBlock\",\n \"downsample\": \"Downsample\",\n \"upsample\": \"Upsample\",\n }\n\n if include is not None:\n preprocess = {k: v for k, v in preprocess.items() if v in include}\n\n preprocess = {k: v for k, v in preprocess.items() if v not in exclude}\n\n loras_excluded = {k: v for k, v in unet_loras.items() if any(x in k for x in preprocess.keys())}\n loras_remaining = {k: v for k, v in unet_loras.items() if k not in loras_excluded}\n\n for exc_k, exc_v in preprocess.items():\n ls = {k: v for k, v in loras_excluded.items() if exc_k in k}\n auto_attach_loras(ls, self.unet, include=[exc_v], exclude=exclude, debug_map=debug_map)\n\n auto_attach_loras(\n loras_remaining,\n self.unet,\n exclude=[*exclude, *preprocess.values()],\n include=include,\n debug_map=debug_map,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.get_loras_by_name","title":"get_loras_by_name","text":"<pre><code>get_loras_by_name(name: str) -> list[Lora[Any]]\n</code></pre> <p>Get the LoRA layers with the given name.</p> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the LoRA.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def get_loras_by_name(self, name: str, /) -> list[Lora[Any]]:\n \"\"\"Get the LoRA layers with the given name.\n\n Args:\n name: The name of the LoRA.\n \"\"\"\n return [lora for lora in self.loras if lora.name == name]\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.get_scale","title":"get_scale","text":"<pre><code>get_scale(name: str) -> float\n</code></pre> <p>Get the scale of the LoRA with the given name.</p> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the LoRA.</p> required <p>Returns:</p> Type Description <code>float</code> <p>The scale of the LoRA layers with the given name.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def get_scale(self, name: str, /) -> float:\n \"\"\"Get the scale of the LoRA with the given name.\n\n Args:\n name: The name of the LoRA.\n\n Returns:\n The scale of the LoRA layers with the given name.\n \"\"\"\n loras = self.get_loras_by_name(name)\n assert all([lora.scale == loras[0].scale for lora in loras]), \"lora scales are not all the same\"\n return loras[0].scale\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.remove_all","title":"remove_all","text":"<pre><code>remove_all() -> None\n</code></pre> <p>Remove all the LoRAs from the target.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def remove_all(self) -> None:\n \"\"\"Remove all the LoRAs from the target.\"\"\"\n for lora_adapter in self.lora_adapters:\n lora_adapter.eject()\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.remove_loras","title":"remove_loras","text":"<pre><code>remove_loras(*names: str) -> None\n</code></pre> <p>Remove multiple LoRAs from the target.</p> <p>Parameters:</p> Name Type Description Default <code>names</code> <code>str</code> <p>The names of the LoRAs to remove.</p> <code>()</code> Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def remove_loras(self, *names: str) -> None:\n \"\"\"Remove multiple LoRAs from the target.\n\n Args:\n names: The names of the LoRAs to remove.\n \"\"\"\n for lora_adapter in self.lora_adapters:\n for name in names:\n lora_adapter.remove_lora(name)\n\n if len(lora_adapter.loras) == 0:\n lora_adapter.eject()\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.set_scale","title":"set_scale","text":"<pre><code>set_scale(name: str, scale: float) -> None\n</code></pre> <p>Set the scale of the LoRA with the given name.</p> <p>Parameters:</p> Name Type Description Default <code>name</code> <code>str</code> <p>The name of the LoRA.</p> required <code>scale</code> <code>float</code> <p>The new scale to set.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def set_scale(self, name: str, scale: float, /) -> None:\n \"\"\"Set the scale of the LoRA with the given name.\n\n Args:\n name: The name of the LoRA.\n scale: The new scale to set.\n \"\"\"\n self.update_scales({name: scale})\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.sort_keys","title":"sort_keys <code>staticmethod</code>","text":"<pre><code>sort_keys(key: str) -> tuple[str, int]\n</code></pre> <p>Compute the score of a key, relatively to its suffix.</p> <p>When used by <code>sorted</code>, the keys will only be sorted \"at the suffix level\". The idea is that sometimes closely related keys in the state dict are not in the same order as the one we expect, for instance <code>q -> k -> v</code> or <code>in -> out</code>. This attempts to fix that issue, not cases where distant layers are called in a different order.</p> <p>Parameters:</p> Name Type Description Default <code>key</code> <code>str</code> <p>The key to sort.</p> required <p>Returns:</p> Type Description <code>str</code> <p>The padded prefix of the key.</p> <code>int</code> <p>A score depending on the key's suffix.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>@staticmethod\ndef sort_keys(key: str, /) -> tuple[str, int]:\n \"\"\"Compute the score of a key, relatively to its suffix.\n\n When used by [`sorted`][sorted], the keys will only be sorted \"at the suffix level\".\n The idea is that sometimes closely related keys in the state dict are not in the\n same order as the one we expect, for instance `q -> k -> v` or `in -> out`. This\n attempts to fix that issue, not cases where distant layers are called in a different\n order.\n\n Args:\n key: The key to sort.\n\n Returns:\n The padded prefix of the key.\n A score depending on the key's suffix.\n \"\"\"\n\n # this dict might not be exhaustive\n suffix_scores = {\"q\": 1, \"k\": 2, \"v\": 3, \"in\": 3, \"out\": 4, \"out0\": 4, \"out_0\": 4}\n patterns = [\"_{}\", \"_{}_lora\"]\n\n # apply patterns to the keys of suffix_scores\n key_char_order = {f.format(k): v for k, v in suffix_scores.items() for f in patterns}\n\n # get the suffix and score for `key` (default: no suffix, highest score = 5)\n (sfx, score) = next(((k, v) for k, v in key_char_order.items() if key.endswith(k)), (\"\", 5))\n\n padded_key_prefix = SDLoraManager._pad(key.removesuffix(sfx))\n return (padded_key_prefix, score)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.lora.SDLoraManager.update_scales","title":"update_scales","text":"<pre><code>update_scales(scales: dict[str, float]) -> None\n</code></pre> <p>Update the scales of multiple LoRAs.</p> <p>Parameters:</p> Name Type Description Default <code>scales</code> <code>dict[str, float]</code> <p>The scales to update. (keys are the names of the LoRAs, values are the new scales to set)</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/lora.py</code> <pre><code>def update_scales(self, scales: dict[str, float], /) -> None:\n \"\"\"Update the scales of multiple LoRAs.\n\n Args:\n scales: The scales to update.\n (keys are the names of the LoRAs, values are the new scales to set)\n \"\"\"\n assert all([name in self.names for name in scales]), f\"Scales keys must be a subset of {self.names}\"\n for name, scale in scales.items():\n for lora in self.get_loras_by_name(name):\n lora.scale = scale\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.image_prompt.IPAdapter","title":"IPAdapter","text":"<pre><code>IPAdapter(\n target: T,\n clip_image_encoder: CLIPImageEncoderH,\n image_proj: Module,\n scale: float = 1.0,\n fine_grained: bool = False,\n weights: dict[str, Tensor] | None = None,\n)\n</code></pre> <p> Bases: <code>Generic[T]</code>, <code>Chain</code>, <code>Adapter[T]</code></p> <p>Image Prompt adapter for a Stable Diffusion U-Net model.</p> <p>See [arXiv:2308.06721] IP-Adapter: Text Compatible Image Prompt Adapter for Text-to-Image Diffusion Models for more details.</p> <p>Parameters:</p> Name Type Description Default <code>target</code> <code>T</code> <p>The target model to adapt.</p> required <code>clip_image_encoder</code> <code>CLIPImageEncoderH</code> <p>The CLIP image encoder to use.</p> required <code>image_proj</code> <code>Module</code> <p>The image projection to use.</p> required <code>scale</code> <code>float</code> <p>The scale to use for the image prompt.</p> <code>1.0</code> <code>fine_grained</code> <code>bool</code> <p>Whether to use fine-grained image prompt.</p> <code>False</code> <code>weights</code> <code>dict[str, Tensor] | None</code> <p>The weights of the IPAdapter.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/image_prompt.py</code> <pre><code>def __init__(\n self,\n target: T,\n clip_image_encoder: CLIPImageEncoderH,\n image_proj: fl.Module,\n scale: float = 1.0,\n fine_grained: bool = False,\n weights: dict[str, Tensor] | None = None,\n) -> None:\n \"\"\"Initialize the adapter.\n\n Args:\n target: The target model to adapt.\n clip_image_encoder: The CLIP image encoder to use.\n image_proj: The image projection to use.\n scale: The scale to use for the image prompt.\n fine_grained: Whether to use fine-grained image prompt.\n weights: The weights of the IPAdapter.\n \"\"\"\n with self.setup_adapter(target):\n super().__init__(target)\n\n self.fine_grained = fine_grained\n self._clip_image_encoder = [clip_image_encoder]\n if fine_grained:\n self._grid_image_encoder = [self.convert_to_grid_features(clip_image_encoder)]\n self._image_proj = [image_proj]\n\n self.sub_adapters = [\n CrossAttentionAdapter(target=cross_attn, scale=scale)\n for cross_attn in filter(lambda attn: type(attn) != fl.SelfAttention, target.layers(fl.Attention))\n ]\n\n if weights is not None:\n image_proj_state_dict: dict[str, Tensor] = {\n k.removeprefix(\"image_proj.\"): v for k, v in weights.items() if k.startswith(\"image_proj.\")\n }\n self.image_proj.load_state_dict(image_proj_state_dict)\n\n for i, cross_attn in enumerate(self.sub_adapters):\n cross_attention_weights: list[Tensor] = []\n for k, v in weights.items():\n prefix = f\"ip_adapter.{i:03d}.\"\n if not k.startswith(prefix):\n continue\n cross_attention_weights.append(v)\n\n assert len(cross_attention_weights) == 2\n cross_attn.load_weights(*cross_attention_weights)\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.image_prompt.IPAdapter.clip_image_encoder","title":"clip_image_encoder <code>property</code>","text":"<pre><code>clip_image_encoder: CLIPImageEncoderH\n</code></pre> <p>The CLIP image encoder of the adapter.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.image_prompt.IPAdapter.scale","title":"scale <code>property</code> <code>writable</code>","text":"<pre><code>scale: float\n</code></pre> <p>The scale of the adapter.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.image_prompt.IPAdapter.compute_clip_image_embedding","title":"compute_clip_image_embedding","text":"<pre><code>compute_clip_image_embedding(\n image_prompt: Image | list[Image] | Tensor,\n weights: list[float] | None = None,\n concat_batches: bool = True,\n) -> Tensor\n</code></pre> <p>Compute CLIP image embeddings from the provided image prompts.</p> <p>Parameters:</p> Name Type Description Default <code>image_prompt</code> <code>Image | list[Image] | Tensor</code> <p>A single image or a list of images to compute embeddings for. This can be a PIL Image, a list of PIL Images, or a Tensor.</p> required <code>weights</code> <code>list[float] | None</code> <p>An optional list of scaling factors for the conditional embeddings. If provided, it must have the same length as the number of images in <code>image_prompt</code>. Each weight scales the corresponding image's conditional embedding, allowing you to adjust the influence of each image. Defaults to uniform weights of 1.0.</p> <code>None</code> <code>concat_batches</code> <code>bool</code> <p>Determines how embeddings are concatenated when multiple images are provided: - If <code>True</code>, embeddings from multiple images are concatenated along the feature dimension to form a longer sequence of image tokens. This is useful when you want to treat multiple images as a single combined input. - If <code>False</code>, embeddings are kept separate along the batch dimension, treating each image independently.</p> <code>True</code> <p>Returns:</p> Type Description <code>Tensor</code> <p>A Tensor containing the CLIP image embeddings.</p> <code>Tensor</code> <p>The structure of the returned Tensor depends on the <code>concat_batches</code> parameter: - If <code>concat_batches</code> is <code>True</code> and multiple images are provided, the embeddings are concatenated along the feature dimension. - If <code>concat_batches</code> is <code>False</code> or a single image is provided, the embeddings are returned as a batch, with one embedding per image.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/image_prompt.py</code> <pre><code>def compute_clip_image_embedding(\n self,\n image_prompt: Image.Image | list[Image.Image] | Tensor,\n weights: list[float] | None = None,\n concat_batches: bool = True,\n) -> Tensor:\n \"\"\"Compute CLIP image embeddings from the provided image prompts.\n\n Args:\n image_prompt: A single image or a list of images to compute embeddings for.\n This can be a PIL Image, a list of PIL Images, or a Tensor.\n weights: An optional list of scaling factors for the conditional embeddings.\n If provided, it must have the same length as the number of images in `image_prompt`.\n Each weight scales the corresponding image's conditional embedding, allowing you to\n adjust the influence of each image. Defaults to uniform weights of 1.0.\n concat_batches: Determines how embeddings are concatenated when multiple images are provided:\n - If `True`, embeddings from multiple images are concatenated along the feature\n dimension to form a longer sequence of image tokens. This is useful when you want to\n treat multiple images as a single combined input.\n - If `False`, embeddings are kept separate along the batch dimension, treating each image\n independently.\n\n Returns:\n A Tensor containing the CLIP image embeddings.\n The structure of the returned Tensor depends on the `concat_batches` parameter:\n - If `concat_batches` is `True` and multiple images are provided, the embeddings are\n concatenated along the feature dimension.\n - If `concat_batches` is `False` or a single image is provided, the embeddings are returned\n as a batch, with one embedding per image.\n \"\"\"\n if isinstance(image_prompt, Image.Image):\n image_prompt = self.preprocess_image(image_prompt)\n elif isinstance(image_prompt, list):\n assert all(\n isinstance(image, Image.Image) for image in image_prompt\n ), \"All elements of `image_prompt` must be of PIL Images.\"\n image_prompt = torch.cat([self.preprocess_image(image) for image in image_prompt])\n\n negative_embedding, conditional_embedding = self._compute_clip_image_embedding(image_prompt)\n\n batch_size = image_prompt.shape[0]\n if weights is not None:\n assert len(weights) == batch_size, f\"Got {len(weights)} weights for {batch_size} images\"\n if any(weight != 1.0 for weight in weights):\n conditional_embedding *= (\n torch.tensor(weights, device=conditional_embedding.device, dtype=conditional_embedding.dtype)\n .unsqueeze(-1)\n .unsqueeze(-1)\n )\n\n if batch_size > 1 and concat_batches:\n # Create a longer image tokens sequence when a batch of images is given\n # See https://github.com/tencent-ailab/IP-Adapter/issues/99\n negative_embedding = torch.cat(negative_embedding.chunk(batch_size), dim=1)\n conditional_embedding = torch.cat(conditional_embedding.chunk(batch_size), dim=1)\n\n return torch.cat((negative_embedding, conditional_embedding))\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.image_prompt.IPAdapter.preprocess_image","title":"preprocess_image","text":"<pre><code>preprocess_image(\n image: Image,\n size: tuple[int, int] = (224, 224),\n mean: list[float] | None = None,\n std: list[float] | None = None,\n) -> Tensor\n</code></pre> <p>Preprocess the image.</p> Note <p>The default mean and std are parameters from https://github.com/openai/CLIP</p> <p>Parameters:</p> Name Type Description Default <code>image</code> <code>Image</code> <p>The image to preprocess.</p> required <code>size</code> <code>tuple[int, int]</code> <p>The size to resize the image to.</p> <code>(224, 224)</code> <code>mean</code> <code>list[float] | None</code> <p>The mean to use for normalization.</p> <code>None</code> <code>std</code> <code>list[float] | None</code> <p>The standard deviation to use for normalization.</p> <code>None</code> Source code in <code>src/refiners/foundationals/latent_diffusion/image_prompt.py</code> <pre><code>def preprocess_image(\n self,\n image: Image.Image,\n size: tuple[int, int] = (224, 224),\n mean: list[float] | None = None,\n std: list[float] | None = None,\n) -> Tensor:\n \"\"\"Preprocess the image.\n\n Note:\n The default mean and std are parameters from\n https://github.com/openai/CLIP\n\n Args:\n image: The image to preprocess.\n size: The size to resize the image to.\n mean: The mean to use for normalization.\n std: The standard deviation to use for normalization.\n \"\"\"\n resized = image.resize(size) # type: ignore\n return normalize(\n image_to_tensor(resized, device=self.target.device, dtype=self.target.dtype),\n mean=[0.48145466, 0.4578275, 0.40821073] if mean is None else mean,\n std=[0.26862954, 0.26130258, 0.27577711] if std is None else std,\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.image_prompt.IPAdapter.set_clip_image_embedding","title":"set_clip_image_embedding","text":"<pre><code>set_clip_image_embedding(image_embedding: Tensor) -> None\n</code></pre> <p>Set the CLIP image embedding context.</p> Note <p>This is required by <code>ImageCrossAttention</code>.</p> <p>Parameters:</p> Name Type Description Default <code>image_embedding</code> <code>Tensor</code> <p>The CLIP image embedding to set.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/image_prompt.py</code> <pre><code>def set_clip_image_embedding(self, image_embedding: Tensor) -> None:\n \"\"\"Set the CLIP image embedding context.\n\n Note:\n This is required by `ImageCrossAttention`.\n\n Args:\n image_embedding: The CLIP image embedding to set.\n \"\"\"\n self.set_context(\"ip_adapter\", {\"clip_image_embedding\": image_embedding})\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.style_aligned.AdaIN","title":"AdaIN","text":"<pre><code>AdaIN(epsilon: float = 1e-08)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Apply Adaptive Instance Normalization (AdaIN) to the target features.</p> <p>See [arXiv:1703.06868] Arbitrary Style Transfer in Real-time with Adaptive Instance Normalization for more details.</p> <p>Receives:</p> Name Type Description <code>reference</code> <code>Float[Tensor, 'cfg_batch_size sequence_length embedding_dim']</code> <p>The reference features.</p> <code>targets</code> <code>Float[Tensor, 'cfg_batch_size sequence_length embedding_dim']</code> <p>The target features.</p> <p>Returns:</p> Name Type Description <code>reference</code> <code>Float[Tensor, 'cfg_batch_size sequence_length embedding_dim']</code> <p>The reference features (unchanged).</p> <code>targets</code> <code>Float[Tensor, 'cfg_batch_size sequence_length embedding_dim']</code> <p>The target features, renormalized.</p> <p>Parameters:</p> Name Type Description Default <code>epsilon</code> <code>float</code> <p>A small value to avoid division by zero.</p> <code>1e-08</code> Source code in <code>src/refiners/foundationals/latent_diffusion/style_aligned.py</code> <pre><code>def __init__(self, epsilon: float = 1e-8) -> None:\n \"\"\"Initialize the AdaIN module.\n\n Args:\n epsilon: A small value to avoid division by zero.\n \"\"\"\n super().__init__()\n self.epsilon = epsilon\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.style_aligned.ExtractReferenceFeatures","title":"ExtractReferenceFeatures","text":"<pre><code>ExtractReferenceFeatures(*args: Any, **kwargs: Any)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Extract the reference features from the input features.</p> Note <p>This layer expects the input features to be a concatenation of conditional and unconditional features, as done when using Classifier-free guidance (CFG).</p> <p>The reference features are the first features of the conditional and unconditional input features. They are extracted, and repeated to match the batch size of the input features.</p> <p>Receives:</p> Name Type Description <code>features</code> <code>Float[Tensor, 'cfg_batch_size sequence_length embedding_dim']</code> <p>The input features.</p> <p>Returns:</p> Name Type Description <code>reference</code> <code>Float[Tensor, 'cfg_batch_size sequence_length embedding_dim']</code> <p>The reference features.</p> Source code in <code>src/refiners/fluxion/layers/module.py</code> <pre><code>def __init__(self, *args: Any, **kwargs: Any) -> None:\n super().__init__(*args, *kwargs) # type: ignore[reportUnknownMemberType]\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.style_aligned.ScaleReferenceFeatures","title":"ScaleReferenceFeatures","text":"<pre><code>ScaleReferenceFeatures(scale: float = 1.0)\n</code></pre> <p> Bases: <code>Module</code></p> <p>Scale the reference features.</p> Note <p>This layer expects the input features to be a concatenation of conditional and unconditional features, as done when using Classifier-free guidance (CFG).</p> <p>This layer scales the reference features which will later be used (in the attention dot product) with the target features.</p> <p>Receives:</p> Name Type Description <code>features</code> <code>Float[Tensor, 'cfg_batch_size sequence_length embedding_dim']</code> <p>The input reference features.</p> <p>Returns:</p> Name Type Description <code>features</code> <code>Float[Tensor, 'cfg_batch_size sequence_length embedding_dim']</code> <p>The rescaled reference features.</p> <p>Parameters:</p> Name Type Description Default <code>scale</code> <code>float</code> <p>The scaling factor.</p> <code>1.0</code> Source code in <code>src/refiners/foundationals/latent_diffusion/style_aligned.py</code> <pre><code>def __init__(\n self,\n scale: float = 1.0,\n) -> None:\n \"\"\"Initialize the ScaleReferenceFeatures module.\n\n Args:\n scale: The scaling factor.\n \"\"\"\n super().__init__()\n self.scale = scale\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.style_aligned.SharedSelfAttentionAdapter","title":"SharedSelfAttentionAdapter","text":"<pre><code>SharedSelfAttentionAdapter(\n target: SelfAttention, scale: float = 1.0\n)\n</code></pre> <p> Bases: <code>Chain</code>, <code>Adapter[SelfAttention]</code></p> <p>Upgrades a <code>SelfAttention</code> layer into a <code>SharedSelfAttention</code> layer.</p> <p>This adapter inserts 3 <code>StyleAligned</code> modules right after the original Q, K, V <code>Linear</code>-s (wrapped inside a <code>fl.Distribute</code>).</p> Source code in <code>src/refiners/foundationals/latent_diffusion/style_aligned.py</code> <pre><code>def __init__(\n self,\n target: fl.SelfAttention,\n scale: float = 1.0,\n) -> None:\n with self.setup_adapter(target):\n super().__init__(target)\n\n self._style_aligned_layers = [\n StyleAligned( # Query\n adain=True,\n concatenate=False,\n scale=scale,\n ),\n StyleAligned( # Key\n adain=True,\n concatenate=True,\n scale=scale,\n ),\n StyleAligned( # Value\n adain=False,\n concatenate=True,\n scale=scale,\n ),\n ]\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.style_aligned.StyleAligned","title":"StyleAligned","text":"<pre><code>StyleAligned(\n adain: bool, concatenate: bool, scale: float = 1.0\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>StyleAligned module.</p> <p>This layer encapsulates the logic of the StyleAligned method, as described in [arXiv:2312.02133] Style Aligned Image Generation via Shared Attention.</p> <p>See also https://blog.finegrain.ai/posts/implementing-style-aligned/.</p> <p>Receives:</p> Name Type Description <code>features</code> <code>Float[Tensor, 'cfg_batch_size sequence_length_in embedding_dim']</code> <p>The input features.</p> <p>Returns:</p> Name Type Description <code>shared_features</code> <code>Float[Tensor, 'cfg_batch_size sequence_length_out embedding_dim']</code> <p>The transformed features.</p> <p>Parameters:</p> Name Type Description Default <code>adain</code> <code>bool</code> <p>Whether to apply Adaptive Instance Normalization to the target features.</p> required <code>scale</code> <code>float</code> <p>The scaling factor for the reference features.</p> <code>1.0</code> <code>concatenate</code> <code>bool</code> <p>Whether to concatenate the reference and target features.</p> required Source code in <code>src/refiners/foundationals/latent_diffusion/style_aligned.py</code> <pre><code>def __init__(\n self,\n adain: bool,\n concatenate: bool,\n scale: float = 1.0,\n) -> None:\n \"\"\"Initialize the StyleAligned module.\n\n Args:\n adain: Whether to apply Adaptive Instance Normalization to the target features.\n scale: The scaling factor for the reference features.\n concatenate: Whether to concatenate the reference and target features.\n \"\"\"\n super().__init__(\n # (features): (cfg_batch_size sequence_length embedding_dim)\n fl.Parallel(\n fl.Identity(),\n ExtractReferenceFeatures(),\n ),\n # (targets, reference)\n AdaIN(),\n # (targets_renormalized, reference)\n fl.Distribute(\n fl.Identity(),\n ScaleReferenceFeatures(scale=scale),\n ),\n # (targets_renormalized, reference_scaled)\n fl.Concatenate(\n fl.GetArg(index=0), # targets\n fl.GetArg(index=1), # reference\n dim=-2, # sequence_length\n ),\n # (features_with_shared_reference)\n )\n\n if not adain:\n adain_module = self.ensure_find(AdaIN)\n self.remove(adain_module)\n\n if not concatenate:\n concatenate_module = self.ensure_find(fl.Concatenate)\n self.replace(\n old_module=concatenate_module,\n new_module=fl.GetArg(index=0), # targets\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.style_aligned.StyleAligned.scale","title":"scale <code>property</code> <code>writable</code>","text":"<pre><code>scale: float\n</code></pre> <p>The scaling factor for the reference features.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.style_aligned.StyleAlignedAdapter","title":"StyleAlignedAdapter","text":"<pre><code>StyleAlignedAdapter(target: T, scale: float = 1.0)\n</code></pre> <p> Bases: <code>Generic[T]</code>, <code>Chain</code>, <code>Adapter[T]</code></p> <p>Upgrade each <code>SelfAttention</code> layer of a UNet into a <code>SharedSelfAttention</code> layer.</p> <p>Parameters:</p> Name Type Description Default <code>target</code> <code>T</code> <p>The target module.</p> required <code>scale</code> <code>float</code> <p>The scaling factor for the reference features.</p> <code>1.0</code> Source code in <code>src/refiners/foundationals/latent_diffusion/style_aligned.py</code> <pre><code>def __init__(\n self,\n target: T,\n scale: float = 1.0,\n) -> None:\n \"\"\"Initialize the StyleAlignedAdapter.\n\n Args:\n target: The target module.\n scale: The scaling factor for the reference features.\n \"\"\"\n with self.setup_adapter(target):\n super().__init__(target)\n\n # create a SharedSelfAttentionAdapter for each SelfAttention module\n self.shared_self_attention_adapters = tuple(\n SharedSelfAttentionAdapter(\n target=self_attention,\n scale=scale,\n )\n for self_attention in self.target.layers(fl.SelfAttention)\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.style_aligned.StyleAlignedAdapter.scale","title":"scale <code>property</code> <code>writable</code>","text":"<pre><code>scale: float\n</code></pre> <p>The scaling factor for the reference features.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.multi_diffusion.DiffusionTarget","title":"DiffusionTarget <code>dataclass</code>","text":"<pre><code>DiffusionTarget(\n *,\n tile: Tile,\n solver: Solver,\n init_latents: Tensor | None = None,\n opacity_mask: Tensor | None = None,\n weight: int = 1,\n start_step: int = 0,\n end_step: int = MAX_STEPS\n)\n</code></pre> <p>Represents a target for the tiled diffusion process.</p> <p>This class encapsulates the parameters and properties needed to define a specific area (target) within a larger diffusion process, allowing for fine-grained control over different regions of the generated image.</p> <p>Attributes:</p> Name Type Description <code>tile</code> <code>Tile</code> <p>The tile defining the area of the target within the latent image.</p> <code>solver</code> <code>Solver</code> <p>The solver to use for this target's diffusion process. This is useful because some solvers have an internal state that needs to be updated during the diffusion process. Using the same solver instance for multiple targets would interfere with this internal state.</p> <code>init_latents</code> <code>Tensor | None</code> <p>The initial latents for this target. If None, the target will be initialized with noise.</p> <code>opacity_mask</code> <code>Tensor | None</code> <p>Mask controlling the target's visibility in the final image. If None, the target will be fully visible. Otherwise, 1 means fully opaque and 0 means fully transparent which means the target has no influence.</p> <code>weight</code> <code>int</code> <p>The importance of this target in the final image. Higher values increase the target's influence.</p> <code>start_step</code> <code>int</code> <p>The diffusion step at which this target begins to influence the process.</p> <code>end_step</code> <code>int</code> <p>The diffusion step at which this target stops influencing the process.</p> <code>size</code> <code>Size</code> <p>The size of the target area.</p> <code>offset</code> <code>tuple[int, int]</code> <p>The top-left offset of the target area within the latent image.</p> <p>The combination of <code>opacity_mask</code> and <code>weight</code> determines the target's overall contribution to the final generated image. The <code>solver</code> is responsible for the actual diffusion calculations for this target.</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.multi_diffusion.MultiDiffusion","title":"MultiDiffusion","text":"<p> Bases: <code>ABC</code>, <code>Generic[T]</code></p> <p>MultiDiffusion class for performing multi-target diffusion using tiled diffusion.</p> <p>For more details, refer to the paper: MultiDiffusion</p>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.multi_diffusion.MultiDiffusion.generate_latent_tiles","title":"generate_latent_tiles <code>staticmethod</code>","text":"<pre><code>generate_latent_tiles(\n size: Size, tile_size: Size, min_overlap: int = 8\n) -> list[Tile]\n</code></pre> <p>Generate tiles for a latent image with the given size and tile size.</p> <p>If one dimension of the <code>tile_size</code> is larger than the corresponding dimension of the image size, a single tile is used to cover the entire image - and therefore <code>tile_size</code> is ignored. This algorithm ensures that the tile size is respected as much as possible, while still covering the entire image and respecting the minimum overlap.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/multi_diffusion.py</code> <pre><code>@staticmethod\ndef generate_latent_tiles(size: Size, tile_size: Size, min_overlap: int = 8) -> list[Tile]:\n \"\"\"\n Generate tiles for a latent image with the given size and tile size.\n\n If one dimension of the `tile_size` is larger than the corresponding dimension of the image size, a single tile is\n used to cover the entire image - and therefore `tile_size` is ignored. This algorithm ensures that the tile size\n is respected as much as possible, while still covering the entire image and respecting the minimum overlap.\n \"\"\"\n assert (\n 0 <= min_overlap < min(tile_size.height, tile_size.width)\n ), \"Overlap must be non-negative and less than the tile size\"\n\n if tile_size.width > size.width or tile_size.height > size.height:\n return [Tile(top=0, left=0, bottom=size.height, right=size.width)]\n\n tiles: list[Tile] = []\n\n def _compute_tiles_and_overlap(length: int, tile_length: int, min_overlap: int) -> tuple[int, int]:\n if tile_length >= length:\n return 1, 0\n num_tiles = math.ceil((length - tile_length) / (tile_length - min_overlap)) + 1\n overlap = (num_tiles * tile_length - length) // (num_tiles - 1)\n return num_tiles, overlap\n\n num_tiles_x, overlap_x = _compute_tiles_and_overlap(\n length=size.width, tile_length=tile_size.width, min_overlap=min_overlap\n )\n num_tiles_y, overlap_y = _compute_tiles_and_overlap(\n length=size.height, tile_length=tile_size.height, min_overlap=min_overlap\n )\n\n for i in range(num_tiles_y):\n for j in range(num_tiles_x):\n x = j * (tile_size.width - overlap_x)\n y = i * (tile_size.height - overlap_y)\n\n # Adjust x and y coordinates to ensure full-sized tiles\n if x + tile_size.width > size.width:\n x = size.width - tile_size.width\n if y + tile_size.height > size.height:\n y = size.height - tile_size.height\n\n tile_right = x + tile_size.width\n tile_bottom = y + tile_size.height\n tiles.append(Tile(top=y, left=x, bottom=tile_bottom, right=tile_right))\n\n return tiles\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.ella_adapter.ELLA","title":"ELLA","text":"<pre><code>ELLA(\n time_channel: int,\n timestep_embedding_dim: int,\n width: int,\n num_layers: int,\n num_heads: int,\n num_latents: int,\n input_dim: int | None = None,\n out_dim: int | None = None,\n device: device | str | None = None,\n dtype: dtype | None = None,\n)\n</code></pre> <p> Bases: <code>Passthrough</code></p> <p>ELLA latents encoder.</p> <p>See [arXiv:2403.05135] ELLA: Equip Diffusion Models with LLM for Enhanced Semantic Alignment for more details.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/ella_adapter.py</code> <pre><code>def __init__(\n self,\n time_channel: int,\n timestep_embedding_dim: int,\n width: int,\n num_layers: int,\n num_heads: int,\n num_latents: int,\n input_dim: int | None = None,\n out_dim: int | None = None,\n device: Device | str | None = None,\n dtype: DType | None = None,\n) -> None:\n super().__init__(\n TimestepEncoder(timestep_embedding_dim, time_channel, device=device, dtype=dtype),\n fl.UseContext(\"adapted_cross_attention_block\", \"llm_text_embedding\"),\n PerceiverResampler(\n timestep_embedding_dim,\n width,\n num_layers,\n num_heads,\n num_latents,\n out_dim,\n input_dim,\n device=device,\n dtype=dtype,\n ),\n fl.SetContext(\"ella\", \"latents\"),\n )\n</code></pre>"},{"location":"reference/foundationals/latent_diffusion/#refiners.foundationals.latent_diffusion.ella_adapter.ELLAAdapter","title":"ELLAAdapter","text":"<pre><code>ELLAAdapter(\n target: T,\n latents_encoder: ELLA,\n weights: dict[str, Tensor] | None = None,\n)\n</code></pre> <p> Bases: <code>Generic[T]</code>, <code>Chain</code>, <code>Adapter[T]</code></p> <p>Adapter for <code>ELLA</code>.</p> Source code in <code>src/refiners/foundationals/latent_diffusion/ella_adapter.py</code> <pre><code>def __init__(self, target: T, latents_encoder: ELLA, weights: dict[str, Tensor] | None = None) -> None:\n if weights is not None:\n latents_encoder.load_state_dict(weights)\n\n self._latents_encoder = [latents_encoder]\n with self.setup_adapter(target):\n super().__init__(target)\n self.sub_adapters = [\n ELLACrossAttentionAdapter(use_context)\n for cross_attn in target.layers(CrossAttentionBlock)\n for use_context in cross_attn.layers(fl.UseContext)\n ]\n</code></pre>"},{"location":"reference/foundationals/segment_anything/","title":"<code class=\"doc-symbol doc-symbol-nav doc-symbol-module\"></code> Segment Anything","text":""},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.HQSAMAdapter","title":"HQSAMAdapter","text":"<pre><code>HQSAMAdapter(\n target: SegmentAnything,\n hq_mask_only: bool = False,\n weights: dict[str, Tensor] | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code>, <code>Adapter[SegmentAnything]</code></p> <p>Adapter for SAM introducing HQ features.</p> <p>See [arXiv:2306.01567] Segment Anything in High Quality for details.</p> Example <pre><code>from refiners.fluxion.utils import load_from_safetensors\n\n# Tips: run scripts/prepare_test_weights.py to download the weights\ntensor_path = \"./tests/weights/refiners-sam-hq-vit-h.safetensors\"\nweights = load_from_safetensors(tensor_path)\n\nhq_sam_adapter = HQSAMAdapter(sam_h, weights=weights)\nhq_sam_adapter.inject() # then use SAM as usual\n</code></pre> <p>Parameters:</p> Name Type Description Default <code>target</code> <code>SegmentAnything</code> <p>The SegmentAnything model to adapt.</p> required <code>hq_mask_only</code> <code>bool</code> <p>Whether to output only the high-quality mask or use it for mask correction (by summing it with the base SAM mask).</p> <code>False</code> <code>weights</code> <code>dict[str, Tensor] | None</code> <p>The weights of the HQSAMAdapter.</p> <code>None</code> Source code in <code>src/refiners/foundationals/segment_anything/hq_sam.py</code> <pre><code>def __init__(\n self,\n target: SegmentAnything,\n hq_mask_only: bool = False,\n weights: dict[str, torch.Tensor] | None = None,\n) -> None:\n \"\"\"Initialize the adapter.\n\n Args:\n target: The SegmentAnything model to adapt.\n hq_mask_only: Whether to output only the high-quality mask or use it for mask correction (by summing it with the base SAM mask).\n weights: The weights of the HQSAMAdapter.\n \"\"\"\n self.vit_embedding_dim = target.image_encoder.embedding_dim\n self.target_num_mask_tokens = target.mask_decoder.num_multimask_outputs + 2\n\n with self.setup_adapter(target):\n super().__init__(target)\n\n if target.mask_decoder.multimask_output:\n raise NotImplementedError(\"Multi-mask mode is not supported in HQSAMAdapter.\")\n\n mask_prediction = target.mask_decoder.ensure_find(MaskPrediction)\n\n self._mask_prediction_adapter = [\n MaskPredictionAdapter(\n mask_prediction, self.vit_embedding_dim, self.target_num_mask_tokens, target.device, target.dtype\n )\n ]\n self._register_adapter_module(\"Chain.HQSAMMaskPrediction\", self.mask_prediction_adapter.hq_sam_mask_prediction)\n\n self._image_encoder_adapter = [SAMViTAdapter(target.image_encoder)]\n self._predictions_post_proc = [PredictionsPostProc(hq_mask_only)]\n\n mask_decoder_tokens = target.mask_decoder.ensure_find(MaskDecoderTokens)\n self._mask_decoder_tokens_extender = [MaskDecoderTokensExtender(mask_decoder_tokens)]\n self._register_adapter_module(\"MaskDecoderTokensExtender.hq_token\", self.mask_decoder_tokens_extender.hq_token)\n\n if weights is not None:\n self.load_weights(weights)\n\n self.to(device=target.device, dtype=target.dtype)\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything","title":"SegmentAnything","text":"<pre><code>SegmentAnything(\n image_encoder: SAMViT,\n point_encoder: PointEncoder,\n mask_encoder: MaskEncoder,\n mask_decoder: MaskDecoder,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>SegmentAnything model.</p> <p>See [arXiv:2304.02643] Segment Anything</p> <p>E.g. see <code>SegmentAnythingH</code> for usage.</p> <p>Attributes:</p> Name Type Description <code>mask_threshold</code> <code>float</code> <p>0.0</p> <p>Parameters:</p> Name Type Description Default <code>image_encoder</code> <code>SAMViT</code> <p>The image encoder to use.</p> required <code>point_encoder</code> <code>PointEncoder</code> <p>The point encoder to use.</p> required <code>mask_encoder</code> <code>MaskEncoder</code> <p>The mask encoder to use.</p> required <code>mask_decoder</code> <code>MaskDecoder</code> <p>The mask decoder to use.</p> required Source code in <code>src/refiners/foundationals/segment_anything/model.py</code> <pre><code>def __init__(\n self,\n image_encoder: SAMViT,\n point_encoder: PointEncoder,\n mask_encoder: MaskEncoder,\n mask_decoder: MaskDecoder,\n device: Device | str = \"cpu\",\n dtype: DType = torch.float32,\n) -> None:\n \"\"\"Initialize SegmentAnything model.\n\n Args:\n image_encoder: The image encoder to use.\n point_encoder: The point encoder to use.\n mask_encoder: The mask encoder to use.\n mask_decoder: The mask decoder to use.\n \"\"\"\n super().__init__(image_encoder, point_encoder, mask_encoder, mask_decoder)\n\n self.to(device=device, dtype=dtype)\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.image_encoder","title":"image_encoder <code>property</code>","text":"<pre><code>image_encoder: SAMViT\n</code></pre> <p>The image encoder.</p>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.image_encoder_resolution","title":"image_encoder_resolution <code>property</code>","text":"<pre><code>image_encoder_resolution: int\n</code></pre> <p>The resolution of the image encoder.</p>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.mask_decoder","title":"mask_decoder <code>property</code>","text":"<pre><code>mask_decoder: MaskDecoder\n</code></pre> <p>The mask decoder.</p>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.mask_encoder","title":"mask_encoder <code>property</code>","text":"<pre><code>mask_encoder: MaskEncoder\n</code></pre> <p>The mask encoder.</p>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.point_encoder","title":"point_encoder <code>property</code>","text":"<pre><code>point_encoder: PointEncoder\n</code></pre> <p>The point encoder.</p>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.compute_image_embedding","title":"compute_image_embedding","text":"<pre><code>compute_image_embedding(image: Image) -> ImageEmbedding\n</code></pre> <p>Compute the embedding of an image.</p> <p>Parameters:</p> Name Type Description Default <code>image</code> <code>Image</code> <p>The image to compute the embedding of.</p> required <p>Returns:</p> Type Description <code>ImageEmbedding</code> <p>The computed image embedding.</p> Source code in <code>src/refiners/foundationals/segment_anything/model.py</code> <pre><code>@no_grad()\ndef compute_image_embedding(self, image: Image.Image) -> ImageEmbedding:\n \"\"\"Compute the embedding of an image.\n\n Args:\n image: The image to compute the embedding of.\n\n Returns:\n The computed image embedding.\n \"\"\"\n original_size = (image.height, image.width)\n return ImageEmbedding(\n features=self.image_encoder(self.preprocess_image(image)),\n original_image_size=original_size,\n )\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.normalize","title":"normalize","text":"<pre><code>normalize(\n coordinates: Tensor, original_size: tuple[int, int]\n) -> Tensor\n</code></pre> <p>See <code>normalize_coordinates</code> Args: coordinates: a tensor of coordinates. original_size: (h, w) the original size of the image. Returns: The [0,1] normalized coordinates tensor.</p> Source code in <code>src/refiners/foundationals/segment_anything/model.py</code> <pre><code>def normalize(self, coordinates: Tensor, original_size: tuple[int, int]) -> Tensor:\n \"\"\"\n See [`normalize_coordinates`][refiners.foundationals.segment_anything.utils.normalize_coordinates]\n Args:\n coordinates: a tensor of coordinates.\n original_size: (h, w) the original size of the image.\n Returns:\n The [0,1] normalized coordinates tensor.\n \"\"\"\n return normalize_coordinates(coordinates, original_size, self.image_encoder_resolution)\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.postprocess_masks","title":"postprocess_masks","text":"<pre><code>postprocess_masks(\n low_res_masks: Tensor, original_size: tuple[int, int]\n) -> Tensor\n</code></pre> <p>See <code>postprocess_masks</code> Args: low_res_masks: a mask tensor of size (N, 1, 256, 256) original_size: (h, w) the original size of the image. Returns: The mask of shape (N, 1, H, W)</p> Source code in <code>src/refiners/foundationals/segment_anything/model.py</code> <pre><code>def postprocess_masks(self, low_res_masks: Tensor, original_size: tuple[int, int]) -> Tensor:\n \"\"\"\n See [`postprocess_masks`][refiners.foundationals.segment_anything.utils.postprocess_masks]\n Args:\n low_res_masks: a mask tensor of size (N, 1, 256, 256)\n original_size: (h, w) the original size of the image.\n Returns:\n The mask of shape (N, 1, H, W)\n \"\"\"\n return postprocess_masks(low_res_masks, original_size, self.image_encoder_resolution)\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.predict","title":"predict","text":"<pre><code>predict(\n input: Image | ImageEmbedding,\n foreground_points: (\n Sequence[tuple[float, float]] | None\n ) = None,\n background_points: (\n Sequence[tuple[float, float]] | None\n ) = None,\n box_points: (\n Sequence[Sequence[tuple[float, float]]] | None\n ) = None,\n low_res_mask: (\n Float[Tensor, \"1 1 256 256\"] | None\n ) = None,\n binarize: bool = True,\n) -> tuple[Tensor, Tensor, Tensor]\n</code></pre> <p>Predict the masks of the input image.</p> <p>Parameters:</p> Name Type Description Default <code>input</code> <code>Image | ImageEmbedding</code> <p>The input image or its embedding.</p> required <code>foreground_points</code> <code>Sequence[tuple[float, float]] | None</code> <p>The points of the foreground.</p> <code>None</code> <code>background_points</code> <code>Sequence[tuple[float, float]] | None</code> <p>The points of the background.</p> <code>None</code> <code>box_points</code> <code>Sequence[Sequence[tuple[float, float]]] | None</code> <p>The points of the box.</p> <code>None</code> <code>low_res_mask</code> <code>Float[Tensor, '1 1 256 256'] | None</code> <p>The low resolution mask.</p> <code>None</code> <code>binarize</code> <code>bool</code> <p>Whether to binarize the masks.</p> <code>True</code> <p>Returns:</p> Type Description <code>Tensor</code> <p>The predicted masks.</p> <code>Tensor</code> <p>The IOU prediction.</p> <code>Tensor</code> <p>The low resolution masks.</p> Source code in <code>src/refiners/foundationals/segment_anything/model.py</code> <pre><code>@no_grad()\ndef predict(\n self,\n input: Image.Image | ImageEmbedding,\n foreground_points: Sequence[tuple[float, float]] | None = None,\n background_points: Sequence[tuple[float, float]] | None = None,\n box_points: Sequence[Sequence[tuple[float, float]]] | None = None,\n low_res_mask: Float[Tensor, \"1 1 256 256\"] | None = None,\n binarize: bool = True,\n) -> tuple[Tensor, Tensor, Tensor]:\n \"\"\"Predict the masks of the input image.\n\n Args:\n input: The input image or its embedding.\n foreground_points: The points of the foreground.\n background_points: The points of the background.\n box_points: The points of the box.\n low_res_mask: The low resolution mask.\n binarize: Whether to binarize the masks.\n\n Returns:\n The predicted masks.\n The IOU prediction.\n The low resolution masks.\n \"\"\"\n if isinstance(input, ImageEmbedding):\n original_size = input.original_image_size\n image_embedding = input.features\n else:\n original_size = (input.height, input.width)\n image_embedding = self.image_encoder(self.preprocess_image(input))\n\n coordinates, type_mask = self.point_encoder.points_to_tensor(\n foreground_points=foreground_points,\n background_points=background_points,\n box_points=box_points,\n )\n self.point_encoder.set_type_mask(type_mask=type_mask)\n\n if low_res_mask is not None:\n mask_embedding = self.mask_encoder(low_res_mask)\n else:\n mask_embedding = self.mask_encoder.get_no_mask_dense_embedding(\n image_embedding_size=self.image_encoder.image_embedding_size\n )\n\n point_embedding = self.point_encoder(self.normalize(coordinates, original_size=original_size))\n dense_positional_embedding = self.point_encoder.get_dense_positional_embedding(\n image_embedding_size=self.image_encoder.image_embedding_size\n )\n\n self.mask_decoder.set_image_embedding(image_embedding=image_embedding)\n self.mask_decoder.set_mask_embedding(mask_embedding=mask_embedding)\n self.mask_decoder.set_point_embedding(point_embedding=point_embedding)\n self.mask_decoder.set_dense_positional_embedding(dense_positional_embedding=dense_positional_embedding)\n\n low_res_masks, iou_predictions = self.mask_decoder()\n\n high_res_masks = self.postprocess_masks(low_res_masks, original_size)\n\n if binarize:\n high_res_masks = high_res_masks > self.mask_threshold\n\n return high_res_masks, iou_predictions, low_res_masks\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnything.preprocess_image","title":"preprocess_image","text":"<pre><code>preprocess_image(image: Image) -> Tensor\n</code></pre> <p>See <code>preprocess_image</code> Args: image: The image to preprocess. Returns: The preprocessed tensor.</p> Source code in <code>src/refiners/foundationals/segment_anything/model.py</code> <pre><code>def preprocess_image(self, image: Image.Image) -> Tensor:\n \"\"\"\n See [`preprocess_image`][refiners.foundationals.segment_anything.utils.preprocess_image]\n Args:\n image: The image to preprocess.\n Returns:\n The preprocessed tensor.\n \"\"\"\n return preprocess_image(image, self.image_encoder_resolution, self.device, self.dtype)\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnythingH","title":"SegmentAnythingH","text":"<pre><code>SegmentAnythingH(\n image_encoder: SAMViTH | None = None,\n point_encoder: PointEncoder | None = None,\n mask_encoder: MaskEncoder | None = None,\n mask_decoder: MaskDecoder | None = None,\n multimask_output: bool | None = None,\n device: device | str = \"cpu\",\n dtype: dtype = float32,\n)\n</code></pre> <p> Bases: <code>SegmentAnything</code></p> <p>SegmentAnything huge model.</p> <p>Parameters:</p> Name Type Description Default <code>image_encoder</code> <code>SAMViTH | None</code> <p>The image encoder to use.</p> <code>None</code> <code>point_encoder</code> <code>PointEncoder | None</code> <p>The point encoder to use.</p> <code>None</code> <code>mask_encoder</code> <code>MaskEncoder | None</code> <p>The mask encoder to use.</p> <code>None</code> <code>mask_decoder</code> <code>MaskDecoder | None</code> <p>The mask decoder to use.</p> <code>None</code> <code>multimask_output</code> <code>bool | None</code> <p>Whether to use multimask output.</p> <code>None</code> <code>device</code> <code>device | str</code> <p>The PyTorch device to use.</p> <code>'cpu'</code> <code>dtype</code> <code>dtype</code> <p>The PyTorch data type to use.</p> <code>float32</code> Example <pre><code>device=\"cuda\" if torch.cuda.is_available() else \"cpu\"\n\n# multimask_output=True is recommended for ambiguous prompts such as a single point.\n# Below, a box prompt is passed, so just use multimask_output=False which will return a single mask\nsam_h = SegmentAnythingH(multimask_output=False, device=device)\n\n# Tips: run scripts/prepare_test_weights.py to download the weights\ntensors_path = \"./tests/weights/segment-anything-h.safetensors\"\nsam_h.load_from_safetensors(tensors_path=tensors_path)\n\nfrom PIL import Image\nimage = Image.open(\"image.png\")\n\nmasks, *_ = sam_h.predict(image, box_points=[[(x1, y1), (x2, y2)]])\n\nassert masks.shape == (1, 1, image.height, image.width)\nassert masks.dtype == torch.bool\n\n# convert it to [0,255] uint8 ndarray of shape (H, W)\nmask = masks[0, 0].cpu().numpy().astype(\"uint8\") * 255\n\nImage.fromarray(mask).save(\"mask_image.png\")\n</code></pre> Source code in <code>src/refiners/foundationals/segment_anything/model.py</code> <pre><code>def __init__(\n self,\n image_encoder: SAMViTH | None = None,\n point_encoder: PointEncoder | None = None,\n mask_encoder: MaskEncoder | None = None,\n mask_decoder: MaskDecoder | None = None,\n multimask_output: bool | None = None,\n device: Device | str = \"cpu\",\n dtype: DType = torch.float32,\n) -> None:\n \"\"\"Initialize SegmentAnything huge model.\n\n Args:\n image_encoder: The image encoder to use.\n point_encoder: The point encoder to use.\n mask_encoder: The mask encoder to use.\n mask_decoder: The mask decoder to use.\n multimask_output: Whether to use multimask output.\n device: The PyTorch device to use.\n dtype: The PyTorch data type to use.\n\n Example:\n ```py\n device=\"cuda\" if torch.cuda.is_available() else \"cpu\"\n\n # multimask_output=True is recommended for ambiguous prompts such as a single point.\n # Below, a box prompt is passed, so just use multimask_output=False which will return a single mask\n sam_h = SegmentAnythingH(multimask_output=False, device=device)\n\n # Tips: run scripts/prepare_test_weights.py to download the weights\n tensors_path = \"./tests/weights/segment-anything-h.safetensors\"\n sam_h.load_from_safetensors(tensors_path=tensors_path)\n\n from PIL import Image\n image = Image.open(\"image.png\")\n\n masks, *_ = sam_h.predict(image, box_points=[[(x1, y1), (x2, y2)]])\n\n assert masks.shape == (1, 1, image.height, image.width)\n assert masks.dtype == torch.bool\n\n # convert it to [0,255] uint8 ndarray of shape (H, W)\n mask = masks[0, 0].cpu().numpy().astype(\"uint8\") * 255\n\n Image.fromarray(mask).save(\"mask_image.png\")\n ```\n \"\"\"\n image_encoder = image_encoder or SAMViTH()\n point_encoder = point_encoder or PointEncoder()\n mask_encoder = mask_encoder or MaskEncoder()\n\n if mask_decoder:\n assert (\n multimask_output is None or mask_decoder.multimask_output == multimask_output\n ), f\"mask_decoder.multimask_output {mask_decoder.multimask_output} should match multimask_output ({multimask_output})\"\n else:\n mask_decoder = MaskDecoder(multimask_output) if multimask_output is not None else MaskDecoder()\n\n super().__init__(image_encoder, point_encoder, mask_encoder, mask_decoder)\n\n self.to(device=device, dtype=dtype)\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.SegmentAnythingH.image_encoder","title":"image_encoder <code>property</code>","text":"<pre><code>image_encoder: SAMViTH\n</code></pre> <p>The image encoder.</p>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.utils.compute_scaled_size","title":"compute_scaled_size","text":"<pre><code>compute_scaled_size(\n size: tuple[int, int], image_encoder_resolution: int\n) -> tuple[int, int]\n</code></pre> <p>Compute the scaled size as expected by the image encoder. This computed size keep the ratio of the input image, and scale it to fit inside the square (image_encoder_resolution, image_encoder_resolution) of image encoder.</p> <p>Parameters:</p> Name Type Description Default <code>size</code> <code>tuple[int, int]</code> <p>The size (h, w) of the input image.</p> required <code>image_encoder_resolution</code> <code>int</code> <p>Image encoder resolution.</p> required <p>Returns:</p> Type Description <code>int</code> <p>The target height.</p> <code>int</code> <p>The target width.</p> Source code in <code>src/refiners/foundationals/segment_anything/utils.py</code> <pre><code>def compute_scaled_size(size: tuple[int, int], image_encoder_resolution: int) -> tuple[int, int]:\n \"\"\"Compute the scaled size as expected by the image encoder.\n This computed size keep the ratio of the input image, and scale it to fit inside the square (image_encoder_resolution, image_encoder_resolution) of image encoder.\n\n Args:\n size: The size (h, w) of the input image.\n image_encoder_resolution: Image encoder resolution.\n\n Returns:\n The target height.\n The target width.\n \"\"\"\n oldh, oldw = size\n scale = image_encoder_resolution * 1.0 / max(oldh, oldw)\n newh, neww = oldh * scale, oldw * scale\n neww = int(neww + 0.5)\n newh = int(newh + 0.5)\n return (newh, neww)\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.utils.image_to_scaled_tensor","title":"image_to_scaled_tensor","text":"<pre><code>image_to_scaled_tensor(\n image: Image,\n scaled_size: tuple[int, int],\n device: device | None = None,\n dtype: dtype | None = None,\n) -> Tensor\n</code></pre> <p>Resize the image to <code>scaled_size</code> and convert it to a tensor.</p> <p>Parameters:</p> Name Type Description Default <code>image</code> <code>Image</code> <p>The image.</p> required <code>scaled_size</code> <code>tuple[int, int]</code> <p>The target size (h, w).</p> required <code>device</code> <code>device | None</code> <p>Tensor device.</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>Tensor dtype.</p> <code>None</code> <p>Returns: a Tensor of shape (1, c, h, w)</p> Source code in <code>src/refiners/foundationals/segment_anything/utils.py</code> <pre><code>def image_to_scaled_tensor(\n image: Image.Image, scaled_size: tuple[int, int], device: Device | None = None, dtype: DType | None = None\n) -> Tensor:\n \"\"\"Resize the image to `scaled_size` and convert it to a tensor.\n\n Args:\n image: The image.\n scaled_size: The target size (h, w).\n device: Tensor device.\n dtype: Tensor dtype.\n Returns:\n a Tensor of shape (1, c, h, w)\n \"\"\"\n h, w = scaled_size\n resized = image.resize((w, h), resample=Image.Resampling.BILINEAR) # type: ignore\n\n return image_to_tensor(resized, device=device, dtype=dtype) * 255.0\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.utils.normalize_coordinates","title":"normalize_coordinates","text":"<pre><code>normalize_coordinates(\n coordinates: Tensor,\n original_size: tuple[int, int],\n image_encoder_resolution: int,\n) -> Tensor\n</code></pre> <p>Normalize the coordinates in the [0,1] range</p> <p>Parameters:</p> Name Type Description Default <code>coordinates</code> <code>Tensor</code> <p>The coordinates to normalize.</p> required <code>original_size</code> <code>tuple[int, int]</code> <p>The original image size.</p> required <code>image_encoder_resolution</code> <code>int</code> <p>Image encoder resolution.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The normalized coordinates.</p> Source code in <code>src/refiners/foundationals/segment_anything/utils.py</code> <pre><code>def normalize_coordinates(coordinates: Tensor, original_size: tuple[int, int], image_encoder_resolution: int) -> Tensor:\n \"\"\"Normalize the coordinates in the [0,1] range\n\n Args:\n coordinates: The coordinates to normalize.\n original_size: The original image size.\n image_encoder_resolution: Image encoder resolution.\n\n Returns:\n The normalized coordinates.\n \"\"\"\n scaled_size = compute_scaled_size(original_size, image_encoder_resolution)\n coordinates[:, :, 0] = (\n (coordinates[:, :, 0] * (scaled_size[1] / original_size[1])) + 0.5\n ) / image_encoder_resolution\n coordinates[:, :, 1] = (\n (coordinates[:, :, 1] * (scaled_size[0] / original_size[0])) + 0.5\n ) / image_encoder_resolution\n return coordinates\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.utils.pad_image_tensor","title":"pad_image_tensor","text":"<pre><code>pad_image_tensor(\n image_tensor: Tensor,\n scaled_size: tuple[int, int],\n image_encoder_resolution: int,\n) -> Tensor\n</code></pre> <p>Pad an image with zeros to make it square.</p> <p>Parameters:</p> Name Type Description Default <code>image_tensor</code> <code>Tensor</code> <p>The image tensor to pad.</p> required <code>scaled_size</code> <code>tuple[int, int]</code> <p>The scaled size (h, w).</p> required <code>image_encoder_resolution</code> <code>int</code> <p>Image encoder resolution.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The padded image.</p> Source code in <code>src/refiners/foundationals/segment_anything/utils.py</code> <pre><code>def pad_image_tensor(image_tensor: Tensor, scaled_size: tuple[int, int], image_encoder_resolution: int) -> Tensor:\n \"\"\"Pad an image with zeros to make it square.\n\n Args:\n image_tensor: The image tensor to pad.\n scaled_size: The scaled size (h, w).\n image_encoder_resolution: Image encoder resolution.\n\n Returns:\n The padded image.\n \"\"\"\n assert len(image_tensor.shape) == 4\n assert image_tensor.shape[2] <= image_encoder_resolution\n assert image_tensor.shape[3] <= image_encoder_resolution\n\n h, w = scaled_size\n padh = image_encoder_resolution - h\n padw = image_encoder_resolution - w\n return pad(image_tensor, (0, padw, 0, padh))\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.utils.postprocess_masks","title":"postprocess_masks","text":"<pre><code>postprocess_masks(\n low_res_masks: Tensor,\n original_size: tuple[int, int],\n image_encoder_resolution: int,\n) -> Tensor\n</code></pre> <p>Postprocess the masks to fit the original image size and remove zero-padding (if any).</p> <p>Parameters:</p> Name Type Description Default <code>low_res_masks</code> <code>Tensor</code> <p>The masks to postprocess.</p> required <code>original_size</code> <code>tuple[int, int]</code> <p>The original size (h, w).</p> required <code>image_encoder_resolution</code> <code>int</code> <p>Image encoder resolution.</p> required <p>Returns:</p> Type Description <code>Tensor</code> <p>The postprocessed masks.</p> Source code in <code>src/refiners/foundationals/segment_anything/utils.py</code> <pre><code>def postprocess_masks(low_res_masks: Tensor, original_size: tuple[int, int], image_encoder_resolution: int) -> Tensor:\n \"\"\"Postprocess the masks to fit the original image size and remove zero-padding (if any).\n\n Args:\n low_res_masks: The masks to postprocess.\n original_size: The original size (h, w).\n image_encoder_resolution: Image encoder resolution.\n\n Returns:\n The postprocessed masks.\n \"\"\"\n scaled_size = compute_scaled_size(original_size, image_encoder_resolution)\n masks = interpolate(low_res_masks, size=Size((image_encoder_resolution, image_encoder_resolution)), mode=\"bilinear\")\n masks = masks[..., : scaled_size[0], : scaled_size[1]] # remove padding added at `preprocess_image` time\n masks = interpolate(masks, size=Size(original_size), mode=\"bilinear\")\n return masks\n</code></pre>"},{"location":"reference/foundationals/segment_anything/#refiners.foundationals.segment_anything.utils.preprocess_image","title":"preprocess_image","text":"<pre><code>preprocess_image(\n image: Image,\n image_encoder_resolution: int,\n device: device | None = None,\n dtype: dtype | None = None,\n) -> Tensor\n</code></pre> <p>Preprocess an image without distorting its aspect ratio.</p> <p>Parameters:</p> Name Type Description Default <code>image</code> <code>Image</code> <p>The image to preprocess before calling the image encoder.</p> required <code>image_encoder_resolution</code> <code>int</code> <p>Image encoder resolution.</p> required <code>device</code> <code>device | None</code> <p>Tensor device (None by default).</p> <code>None</code> <code>dtype</code> <code>dtype | None</code> <p>Tensor dtype (None by default).</p> <code>None</code> <p>Returns:</p> Type Description <code>Tensor</code> <p>The preprocessed image.</p> Source code in <code>src/refiners/foundationals/segment_anything/utils.py</code> <pre><code>def preprocess_image(\n image: Image.Image, image_encoder_resolution: int, device: Device | None = None, dtype: DType | None = None\n) -> Tensor:\n \"\"\"Preprocess an image without distorting its aspect ratio.\n\n Args:\n image: The image to preprocess before calling the image encoder.\n image_encoder_resolution: Image encoder resolution.\n device: Tensor device (None by default).\n dtype: Tensor dtype (None by default).\n\n Returns:\n The preprocessed image.\n \"\"\"\n\n scaled_size = compute_scaled_size((image.height, image.width), image_encoder_resolution)\n\n image_tensor = image_to_scaled_tensor(image, scaled_size, device=device, dtype=dtype)\n\n return pad_image_tensor(\n normalize(image_tensor, mean=[123.675, 116.28, 103.53], std=[58.395, 57.12, 57.375]),\n scaled_size,\n image_encoder_resolution,\n )\n</code></pre>"},{"location":"reference/foundationals/swin/","title":"<code class=\"doc-symbol doc-symbol-nav doc-symbol-module\"></code> Swin Transformers","text":""},{"location":"reference/foundationals/swin/#refiners.foundationals.swin.swin_transformer.SwinTransformer","title":"SwinTransformer","text":"<pre><code>SwinTransformer(\n patch_size: tuple[int, int] = (4, 4),\n in_chans: int = 3,\n embedding_dim: int = 96,\n depths: list[int] | None = None,\n num_heads: list[int] | None = None,\n window_size: int = 7,\n mlp_ratio: float = 4.0,\n device: device | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Swin Transformer (arXiv:2103.14030)</p> <p>Currently specific to MVANet, only supports square inputs.</p> Source code in <code>src/refiners/foundationals/swin/swin_transformer.py</code> <pre><code>def __init__(\n self,\n patch_size: tuple[int, int] = (4, 4),\n in_chans: int = 3,\n embedding_dim: int = 96,\n depths: list[int] | None = None,\n num_heads: list[int] | None = None,\n window_size: int = 7, # image size is 32 * this\n mlp_ratio: float = 4.0,\n device: Device | None = None,\n) -> None:\n if depths is None:\n depths = [2, 2, 6, 2]\n\n if num_heads is None:\n num_heads = [3, 6, 12, 24]\n\n self.num_layers = len(depths)\n assert len(num_heads) == self.num_layers\n\n super().__init__(\n PatchEmbedding(\n patch_size=patch_size,\n in_chans=in_chans,\n embedding_dim=embedding_dim,\n device=device,\n ),\n fl.Passthrough(\n fl.Transpose(1, 2),\n SquareUnflatten(2),\n fl.SetContext(\"swin\", \"outputs\", callback=lambda t, x: t.append(x)),\n ),\n *(\n fl.Chain(\n BasicLayer(\n dim=int(embedding_dim * 2**i),\n depth=depths[i],\n num_heads=num_heads[i],\n window_size=window_size,\n mlp_ratio=mlp_ratio,\n device=device,\n ),\n fl.Passthrough(\n fl.LayerNorm(int(embedding_dim * 2**i), device=device),\n fl.Transpose(1, 2),\n SquareUnflatten(2),\n fl.SetContext(\"swin\", \"outputs\", callback=lambda t, x: t.insert(0, x)),\n ),\n PatchMerging(dim=int(embedding_dim * 2**i), device=device)\n if i < self.num_layers - 1\n else fl.UseContext(\"swin\", \"outputs\").compose(lambda t: tuple(t)),\n )\n for i in range(self.num_layers)\n ),\n )\n</code></pre>"},{"location":"reference/foundationals/swin/#refiners.foundationals.swin.swin_transformer.WindowAttention","title":"WindowAttention","text":"<pre><code>WindowAttention(\n dim: int,\n window_size: int,\n num_heads: int,\n shift: bool = False,\n device: device | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Window-based Multi-head Self-Attention (W-MSA), optionally shifted (SW-MSA).</p> <p>It has a trainable relative position bias (RelativePositionBias).</p> <p>The input projection is stored as a single Linear for q, k and v.</p> Source code in <code>src/refiners/foundationals/swin/swin_transformer.py</code> <pre><code>def __init__(\n self,\n dim: int,\n window_size: int,\n num_heads: int,\n shift: bool = False,\n device: Device | None = None,\n) -> None:\n super().__init__(\n fl.Linear(dim, dim * 3, bias=True, device=device),\n WindowSDPA(window_size, num_heads, shift, device=device),\n fl.Linear(dim, dim, device=device),\n )\n</code></pre>"},{"location":"reference/foundationals/swin/#refiners.foundationals.swin.mvanet.MVANet","title":"MVANet","text":"<pre><code>MVANet(\n embedding_dim: int = 128,\n n_logits: int = 1,\n depths: list[int] | None = None,\n num_heads: list[int] | None = None,\n window_size: int = 12,\n device: device | None = None,\n)\n</code></pre> <p> Bases: <code>Chain</code></p> <p>Multi-view Aggregation Network for Dichotomous Image Segmentation</p> <p>See [arXiv:2404.07445] Multi-view Aggregation Network for Dichotomous Image Segmentation for more details.</p> <p>Parameters:</p> Name Type Description Default <code>embedding_dim</code> <code>int</code> <p>embedding dimension</p> <code>128</code> <code>n_logits</code> <code>int</code> <p>the number of output logits (default to 1) 1 logit is used for alpha matting/foreground-background segmentation/sod segmentation</p> <code>1</code> <code>depths</code> <code>list[int]</code> <p>see <code>SwinTransformer</code></p> <code>None</code> <code>num_heads</code> <code>list[int]</code> <p>see <code>SwinTransformer</code></p> <code>None</code> <code>window_size</code> <code>int</code> <p>default to 12, see <code>SwinTransformer</code></p> <code>12</code> <code>device</code> <code>device | None</code> <p>the device to use</p> <code>None</code> Source code in <code>src/refiners/foundationals/swin/mvanet/mvanet.py</code> <pre><code>def __init__(\n self,\n embedding_dim: int = 128,\n n_logits: int = 1,\n depths: list[int] | None = None,\n num_heads: list[int] | None = None,\n window_size: int = 12,\n device: Device | None = None,\n) -> None:\n if depths is None:\n depths = [2, 2, 18, 2]\n if num_heads is None:\n num_heads = [4, 8, 16, 32]\n\n super().__init__(\n ComputeShallow(embedding_dim=embedding_dim, device=device),\n SplitMultiView(),\n fl.Flatten(0, 1),\n SwinTransformer(\n embedding_dim=embedding_dim,\n depths=depths,\n num_heads=num_heads,\n window_size=window_size,\n device=device,\n ),\n fl.Distribute(*(Unflatten(0, (-1, 5)) for _ in range(5))),\n Pyramid(embedding_dim=embedding_dim, device=device),\n RearrangeMultiView(embedding_dim=embedding_dim, device=device),\n ShallowUpscaler(embedding_dim, device=device),\n fl.Conv2d(embedding_dim, n_logits, kernel_size=3, padding=1, device=device),\n )\n</code></pre>"}]} |