残差网络连接，使得输入与输出的尺寸一样

   def forward(self, x):
        out = self.layer1(x)
        out = self.layer2(out)
        # 使用插值将输入x上采样至与layer2输出相同的尺寸
        x = F.interpolate(x, size=(out.size(2), out.size(3)), mode='bilinear', align_corners=False)
         # 确保x的通道数与out匹配
        x = x[:, :out.size(1), :, :]  # 选择前out.size(1)个通道
        out += x  # 残差连接，将输入直接添加到layer2的输出上
        out = out.reshape(out.size(0), -1)
        out = self.dropout(out)
        out = self.fc(out)
        return out

 

这里采用双线性插值法