this post was submitted on 27 Nov 2023
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Android

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[–] [email protected] 11 points 11 months ago (2 children)

What's an ultra hdr image? Avif? Jxl?

[–] [email protected] 6 points 11 months ago

The short version is that there are two images and sidecar/xmp file sandwiched into one file. First is the standard dynamic range image, what you'd expect to see from a jpeg. Second is the gain map, an image whose contents include details outside of SDR. The sidecar/xmp file has instructions on how to blend the two images together to create a consistent HDR image across displays.

So its HDR-ish enough for the average person. I like this solution, especially after seeing the hellscape that is DSLR raw format support.

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