https://bugs.kde.org/show_bug.cgi?id=357522

Jaime Torres <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|WAITINGFORINFO              |---
             Status|NEEDSINFO                   |REOPENED
     Ever confirmed|0                           |1

--- Comment #9 from Jaime Torres <[email protected]> ---
I'm pretty sure the compression is not applied:
Data obtained by `file *.tiff`
(original)   fax2d.tiff:  TIFF image data, big-endian, direntries=21,
width=1728, height=1082, bps=1, compression=bi-level group 3,
PhotometricInterpretation=WhiteIsZero, orientation=upper-left
(modified) fax2d1.tiff: TIFF image data, little-endian, direntries=13,
width=1082, height=1728, bps=1, compression=none,
PhotometricInterpretation=WhiteIsZero, orientation=upper-left

Probably a QImageWriter with setCompressions(true) has to be used instead of
QImage.save(). https://doc.qt.io/qt-6/qimagewriter.html#details

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