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The amount of artefacts should be substantially reduced in JPEG XL in the next round of comparisons. Last week I submitted the 'ac strategy decision tree trave
by JyrkiAlakuijala 5y ago
The amount of artefacts should be substantially reduced in JPEG XL in the next round of comparisons.
Last week I submitted the 'ac strategy decision tree traversal' change to libjxl, which reduces ringing artefacts substantially, often by 60-70 %. It does a diligent job by choosing the best combination of small integral transforms (there are 10 different 8x8 transforms) instead of just satisfying with a large transform.
This change also improves on image quality, sharpness and truthfulness, it doesn't just blur the artefacts away.
- JyrkiAlakuijala 5y agoOn discord someone posted a before-after-original animations about last week's improvements in low-bpp JPEG XL compression for anime drawings: https://cdn.discordapp.com/attachments/852294618694942750/854459641056722944/jxl_patch_cmp_d1.webp https://cdn.discordapp.com/attachments/852294618694942750/85... This JPEG XL quality improvement has not yet landed in online comparison tools.