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JXL supports extra channels for multispectral images.

JXL supports extra channels for multispectral images.

The bees and reindeer visiting my web site will be very happy to see UV images.

There could be a lot of scientific use cases for this rather than having to cram everything in to a visible color space.

For that use case we have Tiff with float and lossless compression.

My mind drifted closer to steganography.