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How JPEG XL compares to other image codecs
Learn the background of the JPEG XL image codec, its advantages, and the current status of its standardization process at the JPEG Committee.
For the AV1 Image File Format (AVIF), the patent situation looks better since it’s based on AV1, and being royalty free was a major goal of the Alliance for Open Media, which created AV1. The image looks good at first but, on closer inspection, often seems weirdly “plasticy,” e.g., skin complexion becomes very smooth as if the compression applied a huge amount of foundation cream, or “distilled” like an oil painting. The JPEG XL reference encoder (cjpegxl) produces, by default, a well-compressed image that is indistinguishable from (or, in some cases, identical to) the original.
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