Hi,
I know that im2col()
's backward is col2im()
, and I’m studying how F.unfold()
triggers the backward pass of im2col()
.
I noticed there are functions like im2col_backward_cuda()/im2col_backward_out_cuda()/im2col_backward_out_cuda_template()
in Pytorch repository. However, when searching for these names, the only hit is the file itself.
My question is:
- Are the above backward functions ever called at all?
- How is
im2col()
's backward triggered?
Thank you!