This reminds me of Trigrad ('Tringle Gradient Image Compression'), which compresses images by sampling points (at locations biased by the results of sobel edge

This reminds me of Trigrad ('Tringle Gradient Image Compression'), which compresses images by sampling points (at locations biased by the results of sobel edge detection); de-compression is performed by delaunay triangulation, then colouring the triangles using some scheme (the 'nearest neighbour' scheme, which coloured each triangle in a single color, is most similar to this). https://ruarai.github.io/Trigrad/old.html https://ruarai.github.io/Trigrad/old.html https://ruarai.github.io/Trigrad/ https://ruarai.github.io/Trigrad/ https://news.ycombinator.com/item?id=9828962 https://news.ycombinator.com/item?id=9828962