[seghier]

BPG (Better Portable Graphics) is a new image format. Its purpose is to replace the JPEG image format when quality or file size is an issue.
http://bellard.org/bpg/
Support animation :
http://bellard.org/bpg/animation.html
BPG vs JPEG
http://xooyoozoo.github.io/yolo-octo-bu ... pg=s&bpg=s

[will]

Looks like some sort of pixel blurring,mainly on the darker ones.