Bug 461675 - Gamma correction handling seems wrong
Summary: Gamma correction handling seems wrong
Status: RESOLVED WORKSFORME
Alias: None
Product: gwenview
Classification: Applications
Component: general (other bugs)
Version First Reported In: 21.12.3
Platform: Kubuntu Linux
: NOR normal
Target Milestone: ---
Assignee: Gwenview Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-11-10 19:38 UTC by Adam
Modified: 2025-09-24 03:47 UTC (History)
0 users

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Description Adam 2022-11-10 19:38:39 UTC 
SUMMARY
Somebody made a website to uncover a popular error in the handling of gamma correction:
https://carlmastrangelo.com/blog/gamma-steganography

STEPS TO REPRODUCE
1. download https://carlmastrangelo.com/files/gamma-steganography/mux.png
2. open it with Gwenview

OBSERVED RESULT
An almost white picture is shown.

EXPECTED RESULT
"This is fine" is shown.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 22.04
KDE Plasma Version: 5.24.6
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3

ADDITIONAL INFORMATION
Krita also has the bug, but it shows the "This is not fine" version.
Comment 1 A Linux User 2025-08-25 08:23:18 UTC 
Thank you for the bug report. Unfortunately we were not able to get to it yet. Can we ask you to please check if this is still an issue with Gwenview 25.08.0?
Comment 2 Bug Janitor Service 2025-09-09 03:48:25 UTC 
🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!
Comment 3 Bug Janitor Service 2025-09-24 03:47:23 UTC 
🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.