This appears to be quite similar to FLIF (http://flif.info/ http://flif.info/) and to some extent BPG (https://bellard.org/bpg/ https://bellard.org/bpg/). There

This appears to be quite similar to FLIF (http://flif.info/ http://flif.info/) and to some extent BPG (https://bellard.org/bpg/ https://bellard.org/bpg/). There's no shortage of image formats that are better then JPEG and some have been around for quite a while. The problem is in software/hardware support, particularly in browsers. JPEG has a lot of momentum. WebP is only supported in Chrome/Opera (https://caniuse.com/#feat=webp https://caniuse.com/#feat=webp) and IE/Android don't even support animated PNG yet (https://caniuse.com/#feat=apng https://caniuse.com/#feat=apng). I did loads of research on this for a web app dev book, which I'm currently updating for the second edition. Browser image support hasn't changed much since it was originally published.