Is this library in a mature enough state to implement into ComfyUI for handling of heif format images?

[shawnington]

After our joint effort to solve the issue with MPO format images, i started looking at pillow support for heif formats, and found that you @bigcat88 have a library to handle that.

Your example code on pypi is:

register_heif_opener()
im = Image.open("image.heic")  # do whatever need with a Pillow image

Does that just add heif/heic support to the Pillow functions, but still allow them to function as normally otherwise? Have any of these functions been merged into pillow?

If I am understanding right, this opens the image as standard 8-bit RGB so it should function like a normal image when opening?

Or will gain maps still be included?

Im interested in a better way to filter out the gain maps from HDR image types, or if they just open as a standard 8-bit RGB image, thats also fantastic.

[bigcat88]

Does that just add heif/heic support to the Pillow functions, but still allow them to function as normally otherwise?

Yes, that's enough.

Have any of these functions been merged into pillow?

No, and there won't be due to licensing restrictions and a significant increase in effort on the part of the Pillow maintainers to support this.

python-pillow/Pillow#2806

It's the same with AVIF support: bundling such a big thing into Pillow requires a lot of support work in the future.

python-pillow/Pillow#5201

If I am understanding right, this opens the image as standard 8-bit RGB so it should function like a normal image when opening?

Pillow supports 16-bit in "L" mode, so monochrome HEIC/AVIF files will open at 16-bit in monochrome mode.
But for ComfyUI it will be good since you do a "convert("RGB")" command for each image, which converts 16-bit monochrome color to regular 8-bit RGB.

Or will gain maps still be included?

Im interested in a better way to filter out the gain maps from HDR image types, or if they just open as a standard 8-bit RGB image, thats also fantastic.

Bit-depth images in HEIF/AVIF files are not included in the ImageSequence and can only be obtained by calling user-defined functions.
So it's good here :)

Is this library in a mature enough state to implement into ComfyUI for handling of heif format images?

Yes, I think, it is already enough mature to handle reading of the HEIF/AVIF images, in last 4-5 months there were no reports about big problems.