[fxtentacle]

It used to be. Then the AI fanboys arrived and started treating it like a learning problem.

https://arxiv.org/abs/1612.01925

https://arxiv.org/abs/1709.02371

https://arxiv.org/abs/1904.09117

BTW, also the classical algorithms deal very badly with noise and repetitive textures, e.g. a video of a forest in the afternoon.

[rsp1984]

Ever tried "DIS optical flow" in OpenCV? Works like a charm for me even in challenging conditions.

[fxtentacle]

Not yet, thanks for the suggestion :)