XT, XR, XL, XS. I wish the names were more meaningful. I can never remember which one is which or what they're good for, or even which order they came in (and the jpeg.org pages don't even list years).
JPEG XL is the one currently in development, and it has what sound like some really neat features, like floating point pixel data, and lossless conversion from JPEG (and according to Wikipedia [1] back to JPEG, but I'm guessing that only applies to images that went JPEG -> JPEG XL -> JPEG).
JPEG XL is the one currently in development, and it has what sound like some really neat features, like floating point pixel data, and lossless conversion from JPEG (and according to Wikipedia [1] back to JPEG, but I'm guessing that only applies to images that went JPEG -> JPEG XL -> JPEG).
[1] https://en.wikipedia.org/wiki/Joint_Photographic_Experts_Gro...