I am just amazed how much this pretty simple technique gives to the quality of an image after a heavy color-space compression.<p>And the Hilbert curve finds application in dithering [1] as well.<p>[1] <a href="https://en.wikipedia.org/wiki/Hilbert_curve#Applications_and_mapping_algorithms" rel="nofollow">https://en.wikipedia.org/wiki/Hilbert_curve#Applications_and...</a>