38 lines
1.1 KiB
Python
38 lines
1.1 KiB
Python
from PIL import Image
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import torch
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from torch.utils.data import Dataset
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class MyDataSet(Dataset):
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"""自定义数据集"""
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def __init__(self, images_path: list, images_class: list, transform=None):
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self.images_path = images_path
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self.images_class = images_class
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self.transform = transform
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def __len__(self):
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return len(self.images_path)
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def __getitem__(self, item):
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img = Image.open(self.images_path[item])
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# RGB为彩色图片，L为灰度图片
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if img.mode != 'RGB':
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raise ValueError("image: {} isn't RGB mode.".format(self.images_path[item]))
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label = self.images_class[item]
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if self.transform is not None:
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img = self.transform(img)
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return img, label
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@staticmethod
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def collate_fn(batch):
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# 官方实现的default_collate可以参考
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# https://github.com/pytorch/pytorch/blob/67b7e751e6b5931a9f45274653f4f653a4e6cdf6/torch/utils/data/_utils/collate.py
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images, labels = tuple(zip(*batch))
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images = torch.stack(images, dim=0)
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labels = torch.as_tensor(labels)
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return images, labels
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