Bug 501925 - OpenCV dlls not recognised; OpenCV not running; face detection detects no face at all; face detection failure
Summary: OpenCV dlls not recognised; OpenCV not running; face detection detects no fac...
Status: RESOLVED FIXED
Alias: None
Product: digikam
Classification: Applications
Component: Faces-Workflow (show other bugs)
Version: 8.5.0
Platform: Microsoft Windows Microsoft Windows
: NOR major
Target Milestone: ---
Assignee: Digikam Developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-03-23 21:19 UTC by Marv
Modified: 2025-03-24 15:45 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In: 8.7.0
Sentry Crash Report:

Attachments
"about digikam" window, OPENCV is missing (15.53 KB, image/png)
2025-03-23 21:19 UTC, Marv 		Details
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Description Marv 2025-03-23 21:19:04 UTC 
Created attachment 179679 [details]
"about digikam" window, OPENCV is missing

SUMMARY


STEPS TO REPRODUCE
1. Fresh install of Digikam on Windows 10
2. Add person pictures to the library
3. Run the "persons" module to detect faces

OBSERVED RESULT
no face found

EXPECTED RESULT
faces found and proposing UI to tag said faces

SOFTWARE/OS VERSIONS
Windows: 10
Qt Version: 6

ADDITIONAL INFORMATION
I have tried to troubleshoot on my own using the docs, tutorials, chatgpt, but nothings seems to make my software able to recognize its own face detection component, the one called OPENCV.
Comment 1 caulier.gilles 2025-03-23 21:37:07 UTC 
I never seen this kind of dysfunction before...
Comment 2 Michael Miller 2025-03-23 22:35:45 UTC 
Hi Marv,
I strongly recommend uninstalling digiKam 8.5.0 and installing 8.6.0.  There are many improvements in 8.6.0, including a new version of OpenCV. The screenshot shows version 8.5.0.

Cheers,
Mike
Comment 3 caulier.gilles 2025-03-24 15:33:12 UTC 
One point to check is the DK/Setup/Miscs/System settings about OpenCL support with OpenCV on your computer.

Please turn off/on this option to see if it's better :

https://docs.digikam.org/en/setup_application/miscs_settings.html#system-settings

Another point is the OpenCV hardware detection on your computer. Please go to Help/Component Info dialog and copy and paste the content.

Best

Gilles Caulier
Comment 4 Marv 2025-03-24 15:43:19 UTC 
dear Gilles,

thanks for your answer.

I went to the docs and realised I had not installed the binaries :'(

ticket may be closed; sorry for the trouble