近期在看fcn，提到
a natural way to upsample is therefore backwards convolution (sometimes called deconvolution) with an output stride of f. Such an operation is trivial to implement, since it simply reverses the forward and backward passes of convolution
不是很懂，deconv是conv的正向与反向的颠倒。
原文网址：https://www.zhihu.com/question/43609045
博主不让复制，我只好贴图了。