06-30-2024, 04:51 PM
JpegLi isn't a new format (otherwise Gimp wouldn't read it without additional plugins), but a new library implementation, published by Google in April 2024 (so, fairly recent...)
If you look at the number of colors, it is easy to guess how they achieve the result:
So JPegLi is perhaps better at finding colors that mitigate the blocky look, but if you want to keep some image quality, you have better stick to good quality settings where it is not going to be much better than the "classic" library. And don't mistake the intent: Google has been in a crusade to reduce the internet bandwidth usage and has in the past provided many tools to reduce image size. But this is for distribution/publication, not archival nor editing...
If you look at the number of colors, it is easy to guess how they achieve the result:
- Q90 image: 39600
- Q5 image: 2077
- JpegLI Q20 image: 7753
- JpegLI Q5 image: 1655
So JPegLi is perhaps better at finding colors that mitigate the blocky look, but if you want to keep some image quality, you have better stick to good quality settings where it is not going to be much better than the "classic" library. And don't mistake the intent: Google has been in a crusade to reduce the internet bandwidth usage and has in the past provided many tools to reduce image size. But this is for distribution/publication, not archival nor editing...