I am playing the Vision API -- Optical Flow. I found the default output of VNGenerateOpticalFlowRequestRevision1 and VNGenerateOpticalFlowRequestRevision2 looks very different. I suppose Revision2 will generate a better (similar at least ) optical flow visualization. But looks like the magnitude of x and y direction is only ~50% to 70% of that of revision1. Any idea what is going on?
