Fix #4442: Autotag image metadata.

Autotag `greyscale`, `non-repeating_animation`, and `exif_rotation`.

Note that this does not detect all (or even most) greyscale images.
Artists often save greyscale images as RGB instead of as greyscale.
This commit is contained in:
evazion
2021-09-21 10:58:51 -05:00
parent d5981754c4
commit c69ba54b5a
6 changed files with 82 additions and 2 deletions

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