refiners/reference/foundationals/swin/index.html
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<h1><code class="doc-symbol doc-symbol-nav doc-symbol-module"></code> Swin Transformers</h1>
<div class="doc doc-object doc-module">
<div class="doc doc-contents first">
<div class="doc doc-children">
<div class="doc doc-object doc-class">
<h2 id="refiners.foundationals.swin.swin_transformer.SwinTransformer" class="doc doc-heading">
<code class="doc-symbol doc-symbol-heading doc-symbol-class"></code> <span class="doc doc-object-name doc-class-name">SwinTransformer</span>
<a href="#refiners.foundationals.swin.swin_transformer.SwinTransformer" class="headerlink" title="Permanent link">&para;</a></h2>
<div class="language-python doc-signature highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="nf">SwinTransformer</span><span class="p">(</span>
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a> <span class="n">patch_size</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/stdtypes.html#tuple">tuple</a></span><span class="p">[</span><span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span><span class="p">,</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="mi">4</span><span class="p">,</span> <span class="mi">4</span><span class="p">),</span>
</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a> <span class="n">in_chans</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span> <span class="o">=</span> <span class="mi">3</span><span class="p">,</span>
</span><span id="__span-0-4"><a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a> <span class="n">embedding_dim</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span> <span class="o">=</span> <span class="mi">96</span><span class="p">,</span>
</span><span id="__span-0-5"><a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a> <span class="n">depths</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/stdtypes.html#list">list</a></span><span class="p">[</span><span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-6"><a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a> <span class="n">num_heads</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/stdtypes.html#list">list</a></span><span class="p">[</span><span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-7"><a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a> <span class="n">window_size</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span> <span class="o">=</span> <span class="mi">7</span><span class="p">,</span>
</span><span id="__span-0-8"><a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a> <span class="n">mlp_ratio</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#float">float</a></span> <span class="o">=</span> <span class="mf">4.0</span><span class="p">,</span>
</span><span id="__span-0-9"><a id="__codelineno-0-9" name="__codelineno-0-9" href="#__codelineno-0-9"></a> <span class="n">device</span><span class="p">:</span> <span class="n"><span title="torch.device">device</span></span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-10"><a id="__codelineno-0-10" name="__codelineno-0-10" href="#__codelineno-0-10"></a><span class="p">)</span>
</span></code></pre></div>
<div class="doc doc-contents ">
<p class="doc doc-class-bases">
Bases: <code><a class="autorefs autorefs-internal" title="refiners.fluxion.layers.Chain" href="../../fluxion/layers/#refiners.fluxion.layers.Chain">Chain</a></code></p>
<p>Swin Transformer (arXiv:2103.14030)</p>
<p>Currently specific to MVANet, only supports square inputs.</p>
<details class="quote">
<summary>Source code in <code>src/refiners/foundationals/swin/swin_transformer.py</code></summary>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-0-333">333</a></span>
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<span class="normal"><a href="#__codelineno-0-387">387</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-0-333"><a id="__codelineno-0-333" name="__codelineno-0-333"></a><span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span>
</span><span id="__span-0-334"><a id="__codelineno-0-334" name="__codelineno-0-334"></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="__span-0-335"><a id="__codelineno-0-335" name="__codelineno-0-335"></a> <span class="n">patch_size</span><span class="p">:</span> <span class="nb">tuple</span><span class="p">[</span><span class="nb">int</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="mi">4</span><span class="p">,</span> <span class="mi">4</span><span class="p">),</span>
</span><span id="__span-0-336"><a id="__codelineno-0-336" name="__codelineno-0-336"></a> <span class="n">in_chans</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">3</span><span class="p">,</span>
</span><span id="__span-0-337"><a id="__codelineno-0-337" name="__codelineno-0-337"></a> <span class="n">embedding_dim</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">96</span><span class="p">,</span>
</span><span id="__span-0-338"><a id="__codelineno-0-338" name="__codelineno-0-338"></a> <span class="n">depths</span><span class="p">:</span> <span class="nb">list</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-339"><a id="__codelineno-0-339" name="__codelineno-0-339"></a> <span class="n">num_heads</span><span class="p">:</span> <span class="nb">list</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-340"><a id="__codelineno-0-340" name="__codelineno-0-340"></a> <span class="n">window_size</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">7</span><span class="p">,</span> <span class="c1"># image size is 32 * this</span>
</span><span id="__span-0-341"><a id="__codelineno-0-341" name="__codelineno-0-341"></a> <span class="n">mlp_ratio</span><span class="p">:</span> <span class="nb">float</span> <span class="o">=</span> <span class="mf">4.0</span><span class="p">,</span>
</span><span id="__span-0-342"><a id="__codelineno-0-342" name="__codelineno-0-342"></a> <span class="n">device</span><span class="p">:</span> <span class="n">Device</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-343"><a id="__codelineno-0-343" name="__codelineno-0-343"></a><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-344"><a id="__codelineno-0-344" name="__codelineno-0-344"></a> <span class="k">if</span> <span class="n">depths</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-345"><a id="__codelineno-0-345" name="__codelineno-0-345"></a> <span class="n">depths</span> <span class="o">=</span> <span class="p">[</span><span class="mi">2</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="mi">2</span><span class="p">]</span>
</span><span id="__span-0-346"><a id="__codelineno-0-346" name="__codelineno-0-346"></a>
</span><span id="__span-0-347"><a id="__codelineno-0-347" name="__codelineno-0-347"></a> <span class="k">if</span> <span class="n">num_heads</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-348"><a id="__codelineno-0-348" name="__codelineno-0-348"></a> <span class="n">num_heads</span> <span class="o">=</span> <span class="p">[</span><span class="mi">3</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="mi">12</span><span class="p">,</span> <span class="mi">24</span><span class="p">]</span>
</span><span id="__span-0-349"><a id="__codelineno-0-349" name="__codelineno-0-349"></a>
</span><span id="__span-0-350"><a id="__codelineno-0-350" name="__codelineno-0-350"></a> <span class="bp">self</span><span class="o">.</span><span class="n">num_layers</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">depths</span><span class="p">)</span>
</span><span id="__span-0-351"><a id="__codelineno-0-351" name="__codelineno-0-351"></a> <span class="k">assert</span> <span class="nb">len</span><span class="p">(</span><span class="n">num_heads</span><span class="p">)</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">num_layers</span>
</span><span id="__span-0-352"><a id="__codelineno-0-352" name="__codelineno-0-352"></a>
</span><span id="__span-0-353"><a id="__codelineno-0-353" name="__codelineno-0-353"></a> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span>
</span><span id="__span-0-354"><a id="__codelineno-0-354" name="__codelineno-0-354"></a> <span class="n">PatchEmbedding</span><span class="p">(</span>
</span><span id="__span-0-355"><a id="__codelineno-0-355" name="__codelineno-0-355"></a> <span class="n">patch_size</span><span class="o">=</span><span class="n">patch_size</span><span class="p">,</span>
</span><span id="__span-0-356"><a id="__codelineno-0-356" name="__codelineno-0-356"></a> <span class="n">in_chans</span><span class="o">=</span><span class="n">in_chans</span><span class="p">,</span>
</span><span id="__span-0-357"><a id="__codelineno-0-357" name="__codelineno-0-357"></a> <span class="n">embedding_dim</span><span class="o">=</span><span class="n">embedding_dim</span><span class="p">,</span>
</span><span id="__span-0-358"><a id="__codelineno-0-358" name="__codelineno-0-358"></a> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">,</span>
</span><span id="__span-0-359"><a id="__codelineno-0-359" name="__codelineno-0-359"></a> <span class="p">),</span>
</span><span id="__span-0-360"><a id="__codelineno-0-360" name="__codelineno-0-360"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Passthrough</span><span class="p">(</span>
</span><span id="__span-0-361"><a id="__codelineno-0-361" name="__codelineno-0-361"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Transpose</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">),</span>
</span><span id="__span-0-362"><a id="__codelineno-0-362" name="__codelineno-0-362"></a> <span class="n">SquareUnflatten</span><span class="p">(</span><span class="mi">2</span><span class="p">),</span>
</span><span id="__span-0-363"><a id="__codelineno-0-363" name="__codelineno-0-363"></a> <span class="n">fl</span><span class="o">.</span><span class="n">SetContext</span><span class="p">(</span><span class="s2">&quot;swin&quot;</span><span class="p">,</span> <span class="s2">&quot;outputs&quot;</span><span class="p">,</span> <span class="n">callback</span><span class="o">=</span><span class="k">lambda</span> <span class="n">t</span><span class="p">,</span> <span class="n">x</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">x</span><span class="p">)),</span>
</span><span id="__span-0-364"><a id="__codelineno-0-364" name="__codelineno-0-364"></a> <span class="p">),</span>
</span><span id="__span-0-365"><a id="__codelineno-0-365" name="__codelineno-0-365"></a> <span class="o">*</span><span class="p">(</span>
</span><span id="__span-0-366"><a id="__codelineno-0-366" name="__codelineno-0-366"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Chain</span><span class="p">(</span>
</span><span id="__span-0-367"><a id="__codelineno-0-367" name="__codelineno-0-367"></a> <span class="n">BasicLayer</span><span class="p">(</span>
</span><span id="__span-0-368"><a id="__codelineno-0-368" name="__codelineno-0-368"></a> <span class="n">dim</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">embedding_dim</span> <span class="o">*</span> <span class="mi">2</span><span class="o">**</span><span class="n">i</span><span class="p">),</span>
</span><span id="__span-0-369"><a id="__codelineno-0-369" name="__codelineno-0-369"></a> <span class="n">depth</span><span class="o">=</span><span class="n">depths</span><span class="p">[</span><span class="n">i</span><span class="p">],</span>
</span><span id="__span-0-370"><a id="__codelineno-0-370" name="__codelineno-0-370"></a> <span class="n">num_heads</span><span class="o">=</span><span class="n">num_heads</span><span class="p">[</span><span class="n">i</span><span class="p">],</span>
</span><span id="__span-0-371"><a id="__codelineno-0-371" name="__codelineno-0-371"></a> <span class="n">window_size</span><span class="o">=</span><span class="n">window_size</span><span class="p">,</span>
</span><span id="__span-0-372"><a id="__codelineno-0-372" name="__codelineno-0-372"></a> <span class="n">mlp_ratio</span><span class="o">=</span><span class="n">mlp_ratio</span><span class="p">,</span>
</span><span id="__span-0-373"><a id="__codelineno-0-373" name="__codelineno-0-373"></a> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">,</span>
</span><span id="__span-0-374"><a id="__codelineno-0-374" name="__codelineno-0-374"></a> <span class="p">),</span>
</span><span id="__span-0-375"><a id="__codelineno-0-375" name="__codelineno-0-375"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Passthrough</span><span class="p">(</span>
</span><span id="__span-0-376"><a id="__codelineno-0-376" name="__codelineno-0-376"></a> <span class="n">fl</span><span class="o">.</span><span class="n">LayerNorm</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">embedding_dim</span> <span class="o">*</span> <span class="mi">2</span><span class="o">**</span><span class="n">i</span><span class="p">),</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">),</span>
</span><span id="__span-0-377"><a id="__codelineno-0-377" name="__codelineno-0-377"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Transpose</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">),</span>
</span><span id="__span-0-378"><a id="__codelineno-0-378" name="__codelineno-0-378"></a> <span class="n">SquareUnflatten</span><span class="p">(</span><span class="mi">2</span><span class="p">),</span>
</span><span id="__span-0-379"><a id="__codelineno-0-379" name="__codelineno-0-379"></a> <span class="n">fl</span><span class="o">.</span><span class="n">SetContext</span><span class="p">(</span><span class="s2">&quot;swin&quot;</span><span class="p">,</span> <span class="s2">&quot;outputs&quot;</span><span class="p">,</span> <span class="n">callback</span><span class="o">=</span><span class="k">lambda</span> <span class="n">t</span><span class="p">,</span> <span class="n">x</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">x</span><span class="p">)),</span>
</span><span id="__span-0-380"><a id="__codelineno-0-380" name="__codelineno-0-380"></a> <span class="p">),</span>
</span><span id="__span-0-381"><a id="__codelineno-0-381" name="__codelineno-0-381"></a> <span class="n">PatchMerging</span><span class="p">(</span><span class="n">dim</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">embedding_dim</span> <span class="o">*</span> <span class="mi">2</span><span class="o">**</span><span class="n">i</span><span class="p">),</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span>
</span><span id="__span-0-382"><a id="__codelineno-0-382" name="__codelineno-0-382"></a> <span class="k">if</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="bp">self</span><span class="o">.</span><span class="n">num_layers</span> <span class="o">-</span> <span class="mi">1</span>
</span><span id="__span-0-383"><a id="__codelineno-0-383" name="__codelineno-0-383"></a> <span class="k">else</span> <span class="n">fl</span><span class="o">.</span><span class="n">UseContext</span><span class="p">(</span><span class="s2">&quot;swin&quot;</span><span class="p">,</span> <span class="s2">&quot;outputs&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">compose</span><span class="p">(</span><span class="k">lambda</span> <span class="n">t</span><span class="p">:</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">t</span><span class="p">)),</span>
</span><span id="__span-0-384"><a id="__codelineno-0-384" name="__codelineno-0-384"></a> <span class="p">)</span>
</span><span id="__span-0-385"><a id="__codelineno-0-385" name="__codelineno-0-385"></a> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">num_layers</span><span class="p">)</span>
</span><span id="__span-0-386"><a id="__codelineno-0-386" name="__codelineno-0-386"></a> <span class="p">),</span>
</span><span id="__span-0-387"><a id="__codelineno-0-387" name="__codelineno-0-387"></a> <span class="p">)</span>
</span></code></pre></div></td></tr></table></div>
</details>
<div class="doc doc-children">
</div>
</div>
</div>
<div class="doc doc-object doc-class">
<h2 id="refiners.foundationals.swin.swin_transformer.WindowAttention" class="doc doc-heading">
<code class="doc-symbol doc-symbol-heading doc-symbol-class"></code> <span class="doc doc-object-name doc-class-name">WindowAttention</span>
<a href="#refiners.foundationals.swin.swin_transformer.WindowAttention" class="headerlink" title="Permanent link">&para;</a></h2>
<div class="language-python doc-signature highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="nf">WindowAttention</span><span class="p">(</span>
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a> <span class="n">dim</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span><span class="p">,</span>
</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a> <span class="n">window_size</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span><span class="p">,</span>
</span><span id="__span-0-4"><a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a> <span class="n">num_heads</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span><span class="p">,</span>
</span><span id="__span-0-5"><a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a> <span class="n">shift</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#bool">bool</a></span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="__span-0-6"><a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a> <span class="n">device</span><span class="p">:</span> <span class="n"><span title="torch.device">device</span></span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-7"><a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a><span class="p">)</span>
</span></code></pre></div>
<div class="doc doc-contents ">
<p class="doc doc-class-bases">
Bases: <code><a class="autorefs autorefs-internal" title="refiners.fluxion.layers.Chain" href="../../fluxion/layers/#refiners.fluxion.layers.Chain">Chain</a></code></p>
<p>Window-based Multi-head Self-Attenion (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>
<details class="quote">
<summary>Source code in <code>src/refiners/foundationals/swin/swin_transformer.py</code></summary>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-0-215">215</a></span>
<span class="normal"><a href="#__codelineno-0-216">216</a></span>
<span class="normal"><a href="#__codelineno-0-217">217</a></span>
<span class="normal"><a href="#__codelineno-0-218">218</a></span>
<span class="normal"><a href="#__codelineno-0-219">219</a></span>
<span class="normal"><a href="#__codelineno-0-220">220</a></span>
<span class="normal"><a href="#__codelineno-0-221">221</a></span>
<span class="normal"><a href="#__codelineno-0-222">222</a></span>
<span class="normal"><a href="#__codelineno-0-223">223</a></span>
<span class="normal"><a href="#__codelineno-0-224">224</a></span>
<span class="normal"><a href="#__codelineno-0-225">225</a></span>
<span class="normal"><a href="#__codelineno-0-226">226</a></span>
<span class="normal"><a href="#__codelineno-0-227">227</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-0-215"><a id="__codelineno-0-215" name="__codelineno-0-215"></a><span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span>
</span><span id="__span-0-216"><a id="__codelineno-0-216" name="__codelineno-0-216"></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="__span-0-217"><a id="__codelineno-0-217" name="__codelineno-0-217"></a> <span class="n">dim</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span>
</span><span id="__span-0-218"><a id="__codelineno-0-218" name="__codelineno-0-218"></a> <span class="n">window_size</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span>
</span><span id="__span-0-219"><a id="__codelineno-0-219" name="__codelineno-0-219"></a> <span class="n">num_heads</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span>
</span><span id="__span-0-220"><a id="__codelineno-0-220" name="__codelineno-0-220"></a> <span class="n">shift</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="__span-0-221"><a id="__codelineno-0-221" name="__codelineno-0-221"></a> <span class="n">device</span><span class="p">:</span> <span class="n">Device</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-222"><a id="__codelineno-0-222" name="__codelineno-0-222"></a><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-223"><a id="__codelineno-0-223" name="__codelineno-0-223"></a> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span>
</span><span id="__span-0-224"><a id="__codelineno-0-224" name="__codelineno-0-224"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Linear</span><span class="p">(</span><span class="n">dim</span><span class="p">,</span> <span class="n">dim</span> <span class="o">*</span> <span class="mi">3</span><span class="p">,</span> <span class="n">bias</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">),</span>
</span><span id="__span-0-225"><a id="__codelineno-0-225" name="__codelineno-0-225"></a> <span class="n">WindowSDPA</span><span class="p">(</span><span class="n">window_size</span><span class="p">,</span> <span class="n">num_heads</span><span class="p">,</span> <span class="n">shift</span><span class="p">,</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">),</span>
</span><span id="__span-0-226"><a id="__codelineno-0-226" name="__codelineno-0-226"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Linear</span><span class="p">(</span><span class="n">dim</span><span class="p">,</span> <span class="n">dim</span><span class="p">,</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">),</span>
</span><span id="__span-0-227"><a id="__codelineno-0-227" name="__codelineno-0-227"></a> <span class="p">)</span>
</span></code></pre></div></td></tr></table></div>
</details>
<div class="doc doc-children">
</div>
</div>
</div>
</div>
</div>
</div>
<div class="doc doc-object doc-module">
<div class="doc doc-contents first">
<div class="doc doc-children">
<div class="doc doc-object doc-class">
<h2 id="refiners.foundationals.swin.mvanet.MVANet" class="doc doc-heading">
<code class="doc-symbol doc-symbol-heading doc-symbol-class"></code> <span class="doc doc-object-name doc-class-name">MVANet</span>
<a href="#refiners.foundationals.swin.mvanet.MVANet" class="headerlink" title="Permanent link">&para;</a></h2>
<div class="language-python doc-signature highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="nf">MVANet</span><span class="p">(</span>
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a> <span class="n">embedding_dim</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span> <span class="o">=</span> <span class="mi">128</span><span class="p">,</span>
</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a> <span class="n">n_logits</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span>
</span><span id="__span-0-4"><a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a> <span class="n">depths</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/stdtypes.html#list">list</a></span><span class="p">[</span><span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-5"><a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a> <span class="n">num_heads</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/stdtypes.html#list">list</a></span><span class="p">[</span><span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-6"><a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a> <span class="n">window_size</span><span class="p">:</span> <span class="n"><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></span> <span class="o">=</span> <span class="mi">12</span><span class="p">,</span>
</span><span id="__span-0-7"><a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a> <span class="n">device</span><span class="p">:</span> <span class="n"><span title="torch.device">device</span></span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-8"><a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a><span class="p">)</span>
</span></code></pre></div>
<div class="doc doc-contents ">
<p class="doc doc-class-bases">
Bases: <code><a class="autorefs autorefs-internal" title="refiners.fluxion.layers.Chain" href="../../fluxion/layers/#refiners.fluxion.layers.Chain">Chain</a></code></p>
<p>Multi-view Aggregation Network for Dichotomous Image Segmentation</p>
<p>See <a href="https://arxiv.org/abs/2404.07445">[arXiv:2404.07445] Multi-view Aggregation Network for Dichotomous Image Segmentation</a> for more details.</p>
<p><span class="doc-section-title">Parameters:</span></p>
<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Description</th>
<th>Default</th>
</tr>
</thead>
<tbody>
<tr class="doc-section-item">
<td><code>embedding_dim</code></td>
<td>
<code><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></code>
</td>
<td>
<div class="doc-md-description">
<p>embedding dimension</p>
</div>
</td>
<td>
<code>128</code>
</td>
</tr>
<tr class="doc-section-item">
<td><code>n_logits</code></td>
<td>
<code><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></code>
</td>
<td>
<div class="doc-md-description">
<p>the number of output logits (default to 1)
1 logit is used for alpha matting/foreground-background segmentation/sod segmentation</p>
</div>
</td>
<td>
<code>1</code>
</td>
</tr>
<tr class="doc-section-item">
<td><code>depths</code></td>
<td>
<code><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/stdtypes.html#list">list</a>[<a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a>]</code>
</td>
<td>
<div class="doc-md-description">
<p>see <a class="autorefs autorefs-internal" href="#refiners.foundationals.swin.swin_transformer.SwinTransformer"><code>SwinTransformer</code></a></p>
</div>
</td>
<td>
<code>None</code>
</td>
</tr>
<tr class="doc-section-item">
<td><code>num_heads</code></td>
<td>
<code><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/stdtypes.html#list">list</a>[<a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a>]</code>
</td>
<td>
<div class="doc-md-description">
<p>see <a class="autorefs autorefs-internal" href="#refiners.foundationals.swin.swin_transformer.SwinTransformer"><code>SwinTransformer</code></a></p>
</div>
</td>
<td>
<code>None</code>
</td>
</tr>
<tr class="doc-section-item">
<td><code>window_size</code></td>
<td>
<code><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#int">int</a></code>
</td>
<td>
<div class="doc-md-description">
<p>default to 12, see <a class="autorefs autorefs-internal" href="#refiners.foundationals.swin.swin_transformer.SwinTransformer"><code>SwinTransformer</code></a></p>
</div>
</td>
<td>
<code>12</code>
</td>
</tr>
<tr class="doc-section-item">
<td><code>device</code></td>
<td>
<code><span title="torch.device">device</span> | None</code>
</td>
<td>
<div class="doc-md-description">
<p>the device to use</p>
</div>
</td>
<td>
<code>None</code>
</td>
</tr>
</tbody>
</table>
<details class="quote">
<summary>Source code in <code>src/refiners/foundationals/swin/mvanet/mvanet.py</code></summary>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-0-304">304</a></span>
<span class="normal"><a href="#__codelineno-0-305">305</a></span>
<span class="normal"><a href="#__codelineno-0-306">306</a></span>
<span class="normal"><a href="#__codelineno-0-307">307</a></span>
<span class="normal"><a href="#__codelineno-0-308">308</a></span>
<span class="normal"><a href="#__codelineno-0-309">309</a></span>
<span class="normal"><a href="#__codelineno-0-310">310</a></span>
<span class="normal"><a href="#__codelineno-0-311">311</a></span>
<span class="normal"><a href="#__codelineno-0-312">312</a></span>
<span class="normal"><a href="#__codelineno-0-313">313</a></span>
<span class="normal"><a href="#__codelineno-0-314">314</a></span>
<span class="normal"><a href="#__codelineno-0-315">315</a></span>
<span class="normal"><a href="#__codelineno-0-316">316</a></span>
<span class="normal"><a href="#__codelineno-0-317">317</a></span>
<span class="normal"><a href="#__codelineno-0-318">318</a></span>
<span class="normal"><a href="#__codelineno-0-319">319</a></span>
<span class="normal"><a href="#__codelineno-0-320">320</a></span>
<span class="normal"><a href="#__codelineno-0-321">321</a></span>
<span class="normal"><a href="#__codelineno-0-322">322</a></span>
<span class="normal"><a href="#__codelineno-0-323">323</a></span>
<span class="normal"><a href="#__codelineno-0-324">324</a></span>
<span class="normal"><a href="#__codelineno-0-325">325</a></span>
<span class="normal"><a href="#__codelineno-0-326">326</a></span>
<span class="normal"><a href="#__codelineno-0-327">327</a></span>
<span class="normal"><a href="#__codelineno-0-328">328</a></span>
<span class="normal"><a href="#__codelineno-0-329">329</a></span>
<span class="normal"><a href="#__codelineno-0-330">330</a></span>
<span class="normal"><a href="#__codelineno-0-331">331</a></span>
<span class="normal"><a href="#__codelineno-0-332">332</a></span>
<span class="normal"><a href="#__codelineno-0-333">333</a></span>
<span class="normal"><a href="#__codelineno-0-334">334</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-0-304"><a id="__codelineno-0-304" name="__codelineno-0-304"></a><span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span>
</span><span id="__span-0-305"><a id="__codelineno-0-305" name="__codelineno-0-305"></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="__span-0-306"><a id="__codelineno-0-306" name="__codelineno-0-306"></a> <span class="n">embedding_dim</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">128</span><span class="p">,</span>
</span><span id="__span-0-307"><a id="__codelineno-0-307" name="__codelineno-0-307"></a> <span class="n">n_logits</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span>
</span><span id="__span-0-308"><a id="__codelineno-0-308" name="__codelineno-0-308"></a> <span class="n">depths</span><span class="p">:</span> <span class="nb">list</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-309"><a id="__codelineno-0-309" name="__codelineno-0-309"></a> <span class="n">num_heads</span><span class="p">:</span> <span class="nb">list</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-310"><a id="__codelineno-0-310" name="__codelineno-0-310"></a> <span class="n">window_size</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">12</span><span class="p">,</span>
</span><span id="__span-0-311"><a id="__codelineno-0-311" name="__codelineno-0-311"></a> <span class="n">device</span><span class="p">:</span> <span class="n">Device</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-312"><a id="__codelineno-0-312" name="__codelineno-0-312"></a><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-313"><a id="__codelineno-0-313" name="__codelineno-0-313"></a> <span class="k">if</span> <span class="n">depths</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-314"><a id="__codelineno-0-314" name="__codelineno-0-314"></a> <span class="n">depths</span> <span class="o">=</span> <span class="p">[</span><span class="mi">2</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">18</span><span class="p">,</span> <span class="mi">2</span><span class="p">]</span>
</span><span id="__span-0-315"><a id="__codelineno-0-315" name="__codelineno-0-315"></a> <span class="k">if</span> <span class="n">num_heads</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-316"><a id="__codelineno-0-316" name="__codelineno-0-316"></a> <span class="n">num_heads</span> <span class="o">=</span> <span class="p">[</span><span class="mi">4</span><span class="p">,</span> <span class="mi">8</span><span class="p">,</span> <span class="mi">16</span><span class="p">,</span> <span class="mi">32</span><span class="p">]</span>
</span><span id="__span-0-317"><a id="__codelineno-0-317" name="__codelineno-0-317"></a>
</span><span id="__span-0-318"><a id="__codelineno-0-318" name="__codelineno-0-318"></a> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span>
</span><span id="__span-0-319"><a id="__codelineno-0-319" name="__codelineno-0-319"></a> <span class="n">ComputeShallow</span><span class="p">(</span><span class="n">embedding_dim</span><span class="o">=</span><span class="n">embedding_dim</span><span class="p">,</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">),</span>
</span><span id="__span-0-320"><a id="__codelineno-0-320" name="__codelineno-0-320"></a> <span class="n">SplitMultiView</span><span class="p">(),</span>
</span><span id="__span-0-321"><a id="__codelineno-0-321" name="__codelineno-0-321"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Flatten</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span>
</span><span id="__span-0-322"><a id="__codelineno-0-322" name="__codelineno-0-322"></a> <span class="n">SwinTransformer</span><span class="p">(</span>
</span><span id="__span-0-323"><a id="__codelineno-0-323" name="__codelineno-0-323"></a> <span class="n">embedding_dim</span><span class="o">=</span><span class="n">embedding_dim</span><span class="p">,</span>
</span><span id="__span-0-324"><a id="__codelineno-0-324" name="__codelineno-0-324"></a> <span class="n">depths</span><span class="o">=</span><span class="n">depths</span><span class="p">,</span>
</span><span id="__span-0-325"><a id="__codelineno-0-325" name="__codelineno-0-325"></a> <span class="n">num_heads</span><span class="o">=</span><span class="n">num_heads</span><span class="p">,</span>
</span><span id="__span-0-326"><a id="__codelineno-0-326" name="__codelineno-0-326"></a> <span class="n">window_size</span><span class="o">=</span><span class="n">window_size</span><span class="p">,</span>
</span><span id="__span-0-327"><a id="__codelineno-0-327" name="__codelineno-0-327"></a> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">,</span>
</span><span id="__span-0-328"><a id="__codelineno-0-328" name="__codelineno-0-328"></a> <span class="p">),</span>
</span><span id="__span-0-329"><a id="__codelineno-0-329" name="__codelineno-0-329"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Distribute</span><span class="p">(</span><span class="o">*</span><span class="p">(</span><span class="n">Unflatten</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">5</span><span class="p">))</span> <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">5</span><span class="p">))),</span>
</span><span id="__span-0-330"><a id="__codelineno-0-330" name="__codelineno-0-330"></a> <span class="n">Pyramid</span><span class="p">(</span><span class="n">embedding_dim</span><span class="o">=</span><span class="n">embedding_dim</span><span class="p">,</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">),</span>
</span><span id="__span-0-331"><a id="__codelineno-0-331" name="__codelineno-0-331"></a> <span class="n">RearrangeMultiView</span><span class="p">(</span><span class="n">embedding_dim</span><span class="o">=</span><span class="n">embedding_dim</span><span class="p">,</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">),</span>
</span><span id="__span-0-332"><a id="__codelineno-0-332" name="__codelineno-0-332"></a> <span class="n">ShallowUpscaler</span><span class="p">(</span><span class="n">embedding_dim</span><span class="p">,</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">),</span>
</span><span id="__span-0-333"><a id="__codelineno-0-333" name="__codelineno-0-333"></a> <span class="n">fl</span><span class="o">.</span><span class="n">Conv2d</span><span class="p">(</span><span class="n">embedding_dim</span><span class="p">,</span> <span class="n">n_logits</span><span class="p">,</span> <span class="n">kernel_size</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> <span class="n">padding</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">),</span>
</span><span id="__span-0-334"><a id="__codelineno-0-334" name="__codelineno-0-334"></a> <span class="p">)</span>
</span></code></pre></div></td></tr></table></div>
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