`augmentor.resize_sparse_flow_map` does not work for non-sparse flow-maps

[Etienne66]

RAFT/core/utils/augmentor.py

Line 161 in 3fa0bb0

def resize_sparse_flow_map(self, flow, valid, fx=1.0, fy=1.0):

I created Valid mask before-hand for FlyingThings. When I use this to resize it my numbers are vastly off from just re-scaling the flows and recalculating the Valid mask. That and my model doesn't learn when resize_sparse_flow_map is used. I'm not sure what is wrong with it, but something isn't right.

I thought perhaps the x and y coordinates were swapped, but thought perhaps that was due to the reshape that is used. Not too sure.

Or maybe it just doesn't work on Valid masks that only have a view invalid pixels.