JPEG XL against AVIF tested on ImageEngine
Objective metrics (like dssim) are not the best way to compare image codecs. This is in part for the obvious reason - that none of them are perfect and the human eye is better - but also for other reasons, including that some codecs use metrics <i>internally</i> for bitrate targeting, and these metrics can <i>disagree</i> with the metrics used by other codecs. Without a visual comparison, it's impossible to say which metrics are better for a given set of images.<p>JPEG XL was based (in part) on Google's "pik" codec, which used the Butteraugli metric for bitrate targeting.<p>Use your eyes instead: <a href="https://afontenot.github.io/image-formats-comparison/#wasserfassstelle&avif=m&jxl=m" rel="nofollow noreferrer">https://afontenot.github.io/image-formats-comparison/#wasser...</a>