https://bugs.kde.org/show_bug.cgi?id=432630
Bug ID: 432630
Summary: Low-contrast display of 8-bit images
Product: gwenview
Version: Other (add details in bug description)
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
The color management of Gwenview results in image having lower contrast images.
The problem persists for several years, over several Cannon cameras used
(Cannon 30D, 10D, 5D), and several different RAW converters. 16 bit images were
always working well, and I used to think that 8 bit images are just that worse
and continued to export only 16-bit images, until I found that the very simple
and stupid basic windows image browser shipped with Windows 7 can show the
colors I wanted to see on my images even on 8-bit photos. The images are also
showing well in Google Chrome, Firefox, Geegie image viewer.
Example:
https://ferenci84.s3.amazonaws.com/Compare_JPG_Exported.png
STEPS TO REPRODUCE
1. Use the images: https://ferenci84.s3.amazonaws.com/Gwenview_Bug.zip
2. Open the same image with chrome or any other browser, or in Windows image
viewer and compare with one opened with gwenview.
3. Compare the colors
OBSERVED RESULT
The colors shown by gwenview is different, especially the contrast is much
lower.
EXPECTED RESULT
The colors should be the same as other viewers
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ubuntu 18.04.5
(available in About System)
KDE Plasma Version: 5.12.9
KDE Frameworks Version: 5.44.0
Qt Version: 5.9.5
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