错误

Pytorch RuntimeERROR: Given groups=1 weights of size [256,64,1,1] 
expected input[1,16,256,256] to have 64 channels, 
but got 16 channels instead.

错误分析

Given groups=1 weights of size [256,64,1,1] 

代表卷积核的channel 大小为 64->256 ，大小为1*1

expected input [1,16,256,256] to have 64 channels

代表现在要卷积的feature的大小，channel为16, 其实我们期望的输入feature大小channel 为64个通道

but got 16 channel instead

代表我们得到16个channels 的feature 与预期64个channel不一样。