cv.jit.flow.draw data out

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would anyone kind enough to build a patch on how to extract information of movement direction is represented by hue and the distance which is by saturation (cv.jit.flow.draw )? i know it will involve some expr and formula conversion which way beyond my knowledge so any help much appreciated.

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Max Patch
Copy patch and select New From Clipboard in Max.

one way of dealing with cv.jit.lkflow