or split the image in its frequency domains first, and then run the mp3 compression on a spatial curve, but at this point you're already doing a https://en.wiki

or split the image in its frequency domains first, and then run the mp3 compression on a spatial curve, but at this point you're already doing a https://en.wikipedia.org/wiki/Discrete_cosine_transform https://en.wikipedia.org/wiki/Discrete_cosine_transform a core part of JPEG compression, which was actually adapted for mp3: https://en.wikipedia.org/wiki/Modified_discrete_cosine_transform https://en.wikipedia.org/wiki/Modified_discrete_cosine_trans...