- Butteraugli^[https://github.com/google/butteraugli];
- a project that estimates the psychovisual similarity of two images.
- more accurate modeling of ganglion cells, particularly the frequency space inhibition
- it is significantly more complex than traditional metrics like PSNR and SSIM, but claimed to perform better with high-end quality, where degradations are not or barely noticeable.^[https://en.wikipedia.org/wiki/Guetzli#cite_note-IO2016-27]
- An in-house performance evaluation with 614 ratings from 23 people on their own test set of 31 images yielded 75% of ratings favouring of JPEGs encoded for Butteraugli scores over libjpeg-turbo encodes,^[https://en.wikipedia.org/wiki/Guetzli#cite_note-Alakuijala20170313-1-23] which usually score higher on SSIM and PSNRHVS-M.^[https://en.wikipedia.org/wiki/Guetzli#cite_note-encode.ru-20]^[https://en.wikipedia.org/wiki/Guetzli#cite_note-score_reversal-29]
- [[squoosh.app]]