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Experimental AVIF Sample Transform bit depth ext #1572

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y-guyon
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@y-guyon y-guyon commented Sep 11, 2023

Allow encoding and decoding images of more than 12 bits, the limit of the AV1 format. This commit experiments 16-bit AVIF images, made of one primary lossless 8-bit image and one hidden lossy/lossless bit depth extension 8-bit image. The two are combined thanks to a Sample Transform derived image item. Grids and alpha are supported.

Warning: This feature is experimental and not covered by the current AVIF specification.

@y-guyon y-guyon marked this pull request as draft September 11, 2023 14:55
@y-guyon y-guyon force-pushed the bit_depth_extension_derived branch 2 times, most recently from 81ba09b to 1fe4c44 Compare January 17, 2024 10:48
@y-guyon y-guyon force-pushed the bit_depth_extension_derived branch from 1fe4c44 to 3745bb1 Compare March 7, 2024 10:09
Allow encoding and decoding images of more than 12 bits, the limit of
the AV1 format. This commit experiments 16-bit AVIF images, made of
one primary lossless 8-bit image and one hidden lossy/lossless bit
depth extension 8-bit image. The two are combined thanks to a Sample
Transform derived image item. Grids and alpha are supported.

Warning: This feature is experimental and not covered by the current
         AVIF specification.
@y-guyon y-guyon force-pushed the bit_depth_extension_derived branch from 3745bb1 to 62a8b55 Compare March 7, 2024 10:11
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y-guyon commented Mar 12, 2024

Superseded by #2050.

@y-guyon y-guyon closed this Mar 12, 2024
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