Bug 511760

Summary: Face box coordinates get lost
Product: [Applications] digikam Reporter: kde-apps.org
Component: Faces-EngineAssignee: Digikam Developers <digikam-bugs-null>
Status: REPORTED ---    
Severity: normal CC: caulier.gilles, metzpinguin
Priority: NOR    
Version First Reported In: 8.6.0   
Target Milestone: ---   
Platform: Debian stable   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description kde-apps.org 2025-11-07 10:48:00 UTC 
SUMMARY
Face boxes on already processed pictures are moved to the upper left corner, effectively losing the content. In affected photos, all face boxes end up in the upper left corner. Preview images are reduced to a narrow bar. No user action involved.

SOFTWARE/OS VERSIONS
App images of Digikam version 8.6 and up; also dockerized versions 8.7 and 8.8m all running on Debian Bookworm

ADDITIONAL INFORMATION
Comment 1 Maik Qualmann 2025-11-07 11:34:24 UTC 
This problem has never been reported before, and I can't think of a possible cause. If the metadata is being written into the images, please upload a sample image with these coordinates.

Maik
Comment 2 caulier.gilles 2025-12-07 11:37:13 UTC 
fjalar,

Please provide us a sample to test as Maik ask in comment #1

Gilles Caulier
Comment 3 kde-apps.org 2025-12-16 00:18:04 UTC 
Sadly I have no sample at the moment as this happens randomly and not all the time. All data is stored IN the image file, no sidecar files are used. I will get back as soon as the problem shows up again. I don't think this ever happened with Version <8.6.
Comment 4 kde-apps.org 2026-02-01 22:00:48 UTC 
I still have no file I can post for demonstration purposes but I have one more info that might be helpful. I am using the "write metadata to image" option (rather that a sidecar file), and this is supposed to alter the file's timestamp every time data is changed. The affected files however retain their timestamp, so it appears that any data like face coords has in fact never been written to  the image. Still I can see facemarks in the picture - all in the upper left corner.