What's the best way to create a "silhouette" video as opposed to a silhouette photo? Would Optical flow be best for this or sampling every frame for a silhouette or...

It depends! The two key considerations are:

  • how expensive is it to generate a silhouette a priori for every frame? If that’s cheap enough, it might be simpler and better to do that;
  • on the other hand, optical flow can help in frame-to-frame stability.

It’s really going to depend on surrounding context and performance requirements (both latency and accuracy).

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