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Use TIFF orientation #4063

Merged
merged 1 commit into from
Sep 20, 2019
Merged

Use TIFF orientation #4063

merged 1 commit into from
Sep 20, 2019

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radarhere
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@radarhere radarhere commented Sep 13, 2019

Resolves #4053. Alternative to #4062

Transpose TIFF images on load according to the orientation tag - https://www.awaresystems.be/imaging/tiff/tifftags/orientation.html

@ailintom
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Thanks a lot! This works fine for me.

@seb-odoo
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Hello @ailintom do you know if there is any plan to also use the orientation for JPEG files?

@ailintom
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ailintom commented Sep 27, 2019

@seb-odoo JPEG files do not have an orientation tag comparable to the TIFF orientation tag. Unlike TIFF-files,

in JFIF files, the image orientation is always top-down

see https://www.w3.org/Graphics/JPEG/jfif3.pdf
JPEG files however can have EXIF tags, including the orientation EXIF tag, indicating the orientation of camera when shooting. You can transform the image according to the EXIF orientation tag using PIL by calling ImageOps.exif_transpose

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TIFF orientation tag handled differently from most other software when loading G4 TIFF files
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