Apply EXIF orientation when converting images with ImageMagick#577
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casi-3 wants to merge 1 commit into
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Apply EXIF orientation when converting images with ImageMagick#577casi-3 wants to merge 1 commit into
casi-3 wants to merge 1 commit into
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Photos taken on phones store pixels unrotated with an EXIF Orientation tag. Converting them to formats where the tag is lost or ignored (png, webp, ...) produced sideways images. Add -auto-orient so the pixels are rotated according to the tag before writing the output.
![cubic-dev-ai[bot]](https://avatars.githubusercontent.com/in/1082092?s=60&v=4){kind=small}
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Photos taken on phones (iPhone DNG/JPEG, Android, most cameras) store pixels unrotated with an EXIF
Orientationtag. When converting to formats where that tag is lost or ignored (png, webp, ...), the output comes out sideways.This adds
-auto-orientto the magick invocation so pixels are physically rotated according to the tag before writing the output.Verified with exif-orientation-examples:
Landscape_6.jpg(1200x1800 stored, orientation=RightTop) now converts to an upright 1800x1200 png instead of a sideways one. Added a unit test.Summary by cubic
Fixes sideways exports by applying EXIF Orientation during conversion. Adds ImageMagick auto-orientation so phone photos output upright in PNG/WebP and other formats that ignore EXIF.
-auto-orientto themagickcommand to rotate pixels before writing output.-auto-orientis passed during JPG→PNG conversion.Written for commit 0b9c58c. Summary will update on new commits.