Bug 186389

Created attachment 342149 [details]
FLIF comparison chart

This is to start discussion about FLIF - Free Lossless Image Format, and its suitability for being supported by WebKit.

http://flif.info

> FLIF is a novel lossless image format which outperforms PNG, lossless WebP, lossless BPG, lossless JPEG2000, and lossless JPEG XR in terms of compression ratio.
> 
> According to the compression experiments we have performed [older results here], FLIF files are on average:
> 
> 14% smaller than lossless WebP,
> 22% smaller than lossless BPG,
> 33% smaller than brute-force crushed PNG files (using ZopfliPNG),
> 43% smaller than typical PNG files,
> 46% smaller than optimized Adam7-interlaced PNG files,
> 53% smaller than lossless JPEG 2000 compression,
> 74% smaller than lossless JPEG XR compression.
> 
> Even if the best image format was picked out of PNG, JPEG 2000, WebP or BPG for a given image corpus, depending on the type of images (photograph, line art, 8 bit or higher bit depth, etc), then FLIF still beats that by 12% on a median corpus (or 19% on average, including 16-bit images which are not supported by WebP and BPG).

Also see:

https://bugzilla.mozilla.org/show_bug.cgi?id=1240692
https://bugs.chromium.org/p/chromium/issues/detail?id=539120