77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
"""ScanObjectNN download: http://103.24.77.34/scanobjectnn/h5_files.zip."""
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import os
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import h5py
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import numpy as np
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from torch.utils.data import Dataset
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os.environ["HDF5_USE_FILE_LOCKING"] = "FALSE"
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def download():
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BASE_DIR = os.path.dirname(os.path.abspath(__file__))
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DATA_DIR = os.path.join(BASE_DIR, "data")
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if not os.path.exists(DATA_DIR):
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os.mkdir(DATA_DIR)
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if not os.path.exists(os.path.join(DATA_DIR, "h5_files")):
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# note that this link only contains the hardest perturbed variant (PB_T50_RS).
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# for full versions, consider the following link.
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www = "https://web.northeastern.edu/smilelab/xuma/datasets/h5_files.zip"
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# www = 'http://103.24.77.34/scanobjectnn/h5_files.zip'
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zipfile = os.path.basename(www)
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os.system(f"wget {www} --no-check-certificate; unzip {zipfile}")
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os.system(f"mv {zipfile[:-4]} {DATA_DIR}")
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os.system("rm %s" % (zipfile))
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def load_scanobjectnn_data(partition):
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download()
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BASE_DIR = os.path.dirname(os.path.abspath(__file__))
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all_data = []
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all_label = []
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h5_name = BASE_DIR + "/data/h5_files/main_split/" + partition + "_objectdataset_augmentedrot_scale75.h5"
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f = h5py.File(h5_name, mode="r")
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data = f["data"][:].astype("float32")
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label = f["label"][:].astype("int64")
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f.close()
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all_data.append(data)
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all_label.append(label)
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all_data = np.concatenate(all_data, axis=0)
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all_label = np.concatenate(all_label, axis=0)
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return all_data, all_label
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def translate_pointcloud(pointcloud):
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xyz1 = np.random.uniform(low=2.0 / 3.0, high=3.0 / 2.0, size=[3])
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xyz2 = np.random.uniform(low=-0.2, high=0.2, size=[3])
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return np.add(np.multiply(pointcloud, xyz1), xyz2).astype("float32")
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class ScanObjectNN(Dataset):
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def __init__(self, num_points, partition="training"):
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self.data, self.label = load_scanobjectnn_data(partition)
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self.num_points = num_points
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self.partition = partition
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def __getitem__(self, item):
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pointcloud = self.data[item][: self.num_points]
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label = self.label[item]
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if self.partition == "training":
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pointcloud = translate_pointcloud(pointcloud)
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np.random.shuffle(pointcloud)
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return pointcloud, label
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def __len__(self):
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return self.data.shape[0]
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if __name__ == "__main__":
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train = ScanObjectNN(1024)
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test = ScanObjectNN(1024, "test")
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for data, label in train:
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print(data.shape)
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print(label)
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