I had hoped that the renderings I designed would be clearer, but it did not turn out that optical flow leads to very visually coherent results. They are still interesting to look at though, and provide a clear understanding of the results of the optical flow algorithm. The algorithm is iterative, very slow, and takes up lots of memory. Therefore, the clips I processed were necessarily small and short. A point is drawn at the source of the vector, and the vector itself is drawn.
Hotter colors correspond to longer vectors.
If the magnitude of the vector is in the top third out of all non-zero vectors, it is drawn.