https://developer.android.com/guide/topics/media/hdr-image-format
This is really cool, but this is also very much a solved problem with newer codecs like #jpegxl. If Google would just embrace JXL & push for widespread support, we might actually be able to move past JPEG instead of using hacks like this. #AVIF isn't going anywhere outside specific Web use cases, as much as I really like it due to its great coding efficiency for certain quality ranges.
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