FoldBackward

Autograd node for Fold (col2im), the adjoint of Unfold.

fold scatter-adds patches back into an image, so its transpose is exactly the unfold gather — the backward runs unfold_forward with the same hyper-parameters.

Members

output_size_ : vector<int> Spatial extent of the folded output, per axis. kernel_, stride_, pad_, dilation_ : vector<int> Per-axis hyper-parameters, as for UnfoldBackward.