Pytorch 新手来了!我正在尝试微调 VGG16 模型以预测 3 个不同的类别。我的部分工作涉及将 FC 层转换为 CONV 层。但是,我的预测值不在 0 到 2(3 个类别)之间。有人能给我指出一个关于如何计算最后一层正确尺寸的好资源吗?以下是 VGG16 的原始 fC 层:(classifier): Sequential( (0): Linear(in_features=25088, out_features=4096, bias=True) (1): ReLU(inplace) (2): Dropout(p=0.5) (3): Linear(in_features=4096, out_features=4096, bias=True) (4): ReLU(inplace) (5): Dropout(p=0.5) (6): Linear(in_features=4096, out_features=1000, bias=True) )我将 FC 层转换为 CONV 的代码: def convert_fc_to_conv(self, fc_layers): # Replace first FC layer with CONV layer fc = fc_layers[0].state_dict() in_ch = 512 out_ch = fc["weight"].size(0) first_conv = nn.Conv2d(512, out_ch, kernel_size=(1, 1), stride=(1, 1)) conv_list = [first_conv] for idx, layer in enumerate(fc_layers[1:]): if isinstance(layer, nn.Linear): fc = layer.state_dict() in_ch = fc["weight"].size(1) out_ch = fc["weight"].size(0) if idx == len(fc_layers)-4: in_ch = 3 conv = nn.Conv2d(out_ch, in_ch, kernel_size=(1, 1), stride=(1, 1)) conv_list += [conv] else: conv_list += [layer] gc.collect() avg_pool = nn.AvgPool2d(kernel_size=2, stride=1, ceil_mode=False) conv_list += [avg_pool, nn.Softmax()] top_layers = nn.Sequential(*conv_list) return top_layers
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