如何把imagenet预训练的模型,输入层的通道数随心所欲的修改,从而来适应自己的任务 #增加一个通道 w = layers[0].weight layers[0] = nn.Conv2d(4, 64, kernel_size=(7, 7), stride=(2, 2), padding=(3, 3), bias=False) layers[0].weight = torch.nn.Parameter(torch.cat((w, w[:, :1, :, :]), dim=1)) #方式2 w = layers[0].weight layers[0] = nn.Conv2d(4, 64, ke