Re:Using Saliency in progressive JPEG XL images
by est31 on Friday September 10, 2021 @06:32AM
(#28479688)
> you can have mixed lossless/lossy content in one image. No longer will you need to choose between a lossy or lossless format: the encoder would intelligently segment the image.
What's the advantage of that? If I'm dissatisfied with the compression quality in some areas, I can tweak the quality parameter already.
Re:Using Saliency in progressive JPEG XL images
by zebracanevra on Friday September 10, 2021 @06:47AM
(#28479770)
See https://github.com/libjxl/libjxl/pull/466 for more details.
As far as I understand it, the synthetic mode compresses better for (as you can guess) synthetic content. So if you're encoding a mixed content screenshot, you'll get better quality and size by encoding the photos and UI separately.
Hopefully JXL doesn't become yet another image format (927)... some features of it are incredible. For example, you can have mixed lossless/lossy content in one image. No longer will you need to choose between a lossy or lossless format: the encoder would intelligently segment the image.