RuntimeError: The size of tensor a (4) must match the size of tensor b (3) at non-singleton dimension 0

读取格式不对
改正方法：

image = Image.open(image_path).convert('RGB')

需要转RGB模式

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RuntimeError: The size of tensor a (4) must match the size of tensor b (3)

RuntimeError: The size of tensor a (4) must match the size of tensor b (3) at non-singleton dimension 0

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