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.
Looks like google doesn’t introduce a new file ending / format. You’ll never know if you’ve got a normal jpg or that hdr thingy.
I wonder why they do that intermediate step to avif.
Maybe because they are not yet ready and confident that avif may replace jpg right now.aybe it’s the first step towards avif.
What’s an ultra hdr image? Avif? Jxl?
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.
Looks like google doesn’t introduce a new file ending / format. You’ll never know if you’ve got a normal jpg or that hdr thingy. I wonder why they do that intermediate step to avif.
Maybe because they are not yet ready and confident that avif may replace jpg right now.aybe it’s the first step towards avif.
https://www.notebookcheck.net/New-Google-Ultra-HDR-image-format-demonstrated-as-future-of-photography.758787.0.html