[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 Maik Qualmann changed: What|Removed |Added Version Fixed In||8.8.0 Resolution|--- |FIXED Status|REPORTED|RESOLVED -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #20 from Charlie Gorichanaz --- Hadn't used an appimage before, that was pretty straightforward. ``` $ wget https://cdn.files.kde.org/digikam/digiKam-8.8.0-20250719T191430-Qt6-x86-64.appimage $ chmod +x digiKam-8.8.0-20250719T191430-Qt6-x86-64.appimage $ ./digiKam-8.8.0-20250719T191430-Qt6-x86-64.appimage ``` - I then ran the same face recognition process I tried before, and this time I indeed got a bunch of faces show up under the Unconfirmed tag! - I also then checked "Use OpenCL hardware acceleration" and "Use OpenCL acceleration for AI models" and restarted the process, ran another scan of another folder, and it seems to be working correctly now. - Next I launched my native Digikam installation to run another scan on a new folder to confirm that one did not magically start working due to any recent changes to my system. This added 150+ faces to the Unknown tag but did not change the Unconfirmed tag. - Then I relaunched the new appimage, did a recognize only on that same section of my library, and this time it added 120 faces to Unconfirmed and the Unknown count went down by the same. So it seems the appimage provided above works for me, while my native digikam install continues to not work. Note in case it becomes relevant, for some reason I was not able to launch the appimage prepending the command with "prime-run" to get it to use my discrete GPU, but as mentioned before, I may have a misconfiguration on my end. -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #19 from [email protected] --- The digiKam 8.8.0 pre-relelase AppImage have been rebuilt using last Qt 6.9.1, OpenCV 4.12, and KDE framework 6.16. https://files.kde.org/digikam/digiKam-8.8.0-20250719T191430-Qt6-x86-64.appimage.mirrorlist Can you reproduce the problem with this version? Best regards Gilles Caulier -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #18 from Maik Qualmann --- Git commit afe5772bf982e95bdf312dd627031bf838564249 by Maik Qualmann. Committed on 16/07/2025 at 16:29. Pushed by mqualmann into branch 'master'. try to fix exception with OpenCV-4.12 Related: bug 507101 M +1-1core/libs/facesengine/recognition/faceclassifier.cpp https://invent.kde.org/graphics/digikam/-/commit/afe5772bf982e95bdf312dd627031bf838564249 -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 Maik Qualmann changed: What|Removed |Added CC||[email protected] --- Comment #17 from Maik Qualmann --- *** Bug 507101 has been marked as a duplicate of this bug. *** -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #16 from Charlie Gorichanaz --- That's a good question... I almost never need to specifically deal with that on Arch somehow, aside from a few packages that depend on Python major versions in my experience. I don't recall watching anything compile when updating the digikam package. It does look like the Digikam package maintainer pushed an update to the PKGBUILD https://gitlab.archlinux.org/archlinux/packaging/packages/digikam specifically referencing opencv 4.12 a week ago at [upgpkg: 8.7.0-2: opencv 4.12 rebuild (0b3911b3) · Commits · Arch Linux / Packaging / Packages / digikam · GitLab](https://gitlab.archlinux.org/archlinux/packaging/packages/digikam/-/commit/0b3911b3f0465d35df5d276cd78ebdbb80a478ca) though I don't understand what actually changed with the package. -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #15 from [email protected] --- The new opencv version is out few days ago. We don't yet tested with this version, but i doubt that it's the problem. At least if opencv is updated, digiKam must be recompiled of course. It's the case ? -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #14 from Charlie Gorichanaz --- Hi Maik, yes, that exception does appear in every log I've saved while testing this, and is appearing for me currently when launching Digikam. Does that seem like something Digikam's causing or a problem in that package? In case it helps, it looks like I've updated opencv package a few times in the last month. I could try testing an older version if you think it's relevant. ``` 40043 27924 -rw-r--r-- 1 root root 28591680 Jun 12 05:14 /var/cache/pacman/pkg/opencv-4.11.0-13-x86_64.pkg.tar.zst 41040 27924 -rw-r--r-- 1 root root 28591764 Jun 25 23:06 /var/cache/pacman/pkg/opencv-4.11.0-14-x86_64.pkg.tar.zst 41473 29384 -rw-r--r-- 1 root root 30085722 Jul 2 09:46 /var/cache/pacman/pkg/opencv-4.12.0-1-x86_64.pkg.tar.zst ``` -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #13 from Maik Qualmann --- I also found this error message in your old log. Apparently, there was an exception while loading the training data. Is this message still appearing, right at the beginning of digiKam's startup? digikam.facesengine: FaceClassifier::loadTrainingData: exception: OpenCV(4.12.0) /usr/include/opencv4/opencv2/core/mat.inl.hpp:921: error: (-215:Assertion failed) (unsigned)(pt.x * DataType<_Tp>::channels) < (unsigned)(size.p[1] * channels()) in function 'at' Maik -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #12 from Charlie Gorichanaz --- For good measure, I also ran a "Recognize faces only" with setting bumped down to 5 and selecting all albums + Unknown tag. That produced 0 recognized faces. My people sidebar says "Unknown (3192)", and when I click it, the main area shows "Unknown / 2,875 items". I assume that's because some images have multiple face tags of unknown. But anyway, I would expect some faces in there to be recognized, especially since many of them are my own face. -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #11 from Charlie Gorichanaz --- I just finished rebuilding training DB with the openCV option disabled, but unfortunately the face scan still recognizes no faces of the 280 faces it said were detected. The output for that whole execution was 254748 lines, and seems to contain a lot of more personal data (full names of people in my DB, filenames, etc.). -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #10 from Chad B. --- (In reply to Maik Qualmann from comment #9) > The training database probably needs to be rebuilt now as well. > > Maik Does a separate bug need to be created for tracking on Windows as well? OpenCL was never on for me on Windows, with external DB on Linux server, but no faces detected. -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #9 from Maik Qualmann --- The training database probably needs to be rebuilt now as well. Maik -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #8 from Charlie Gorichanaz --- I just tried unchecking the checkbox "Use OpenCL hardware acceleration" and re-scanned, still have the same result with no faces recognized. I also tried restarting digikam, ensuring the box was still unchecked, and same results. Note that line with "OPENCV_OCL4DNN_CONFIG_PATH" no longer appears in my console log output with the box unchecked. But still I have no face recognition. Please let me know if I should provide the detailed logs again. -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 Maik Qualmann changed: What|Removed |Added CC||[email protected] --- Comment #7 from Maik Qualmann --- This message is strange, and you can find information about it online. Please disable OpenCL in digiKam and restart. Does face recognition work now? [ WARN:[email protected]] global ocl4dnn_conv_spatial.cpp:1931 loadTunedConfig OpenCV(ocl4dnn): consider to specify kernel configuration cache directory through OPENCV_OCL4DNN_CONFIG_PATH parameter. Maik -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #6 from Charlie Gorichanaz --- Created attachment 183235 --> https://bugs.kde.org/attachment.cgi?id=183235&action=edit digikam stdout/err log Attached is the output of launching digikam and running a recognize faces only scan that finds around 300 faces but recognizes none. export QT_LOGGING_RULES="digikam*=true"; digikam 2>&1 | tee digikam-cgorichanaz.txt -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 Chad B. changed: What|Removed |Added CC||[email protected] --- Comment #5 from Chad B. --- I'm experiencing the same issue on Windows 10/11 as well. After performing "scan for faces" about 6000 images were identified in my library. I identified and classified several hundred images, across about 20-30 unique people. After performing this, I then ran the "Recognize Faces" which ran back thru the remaining ~5000 images that had faces identified and previously placed in the Unknown category. It was stated that ZERO faces were recognized. I selected to install all of the optional packages, and they all show as installed. I'm not using any GPU for identification. I've also rebuilt all training data to no avail. -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 Charlie Gorichanaz changed: What|Removed |Added CC||[email protected] --- Comment #4 from Charlie Gorichanaz --- This issue was brought up a few times on the digikam-users mailing list (Topic: "Still cant figure out face recognition under 8.7"). One user reported recognition not working on Windows 11 digikam 8.7. Two users (myself included) report the issue on Arch Linux. I did recently configure my system to use the discrete NVIDIA GeForce RTX 4070 Laptop GPU for digikam, previously I was using the CPU only on my laptop with an Intel Core Ultra 9 185H CPU. I did this by installing some packages related to "PRIME render offload" (https://wiki.archlinux.org/title/PRIME#PRIME_render_offload) and set an alias in my environment as: digikam='prime-run digikam'. I thought this allowed digiKam to report that it was using the GPU when I clicked the "Test GPU AI compatibility" button under Misc > System, but now I am looking at that output and am not certain. It says it can use GPU but also reporting Intel ARC Graphics. ``` Starting OpenCV OpenCL DNN test... Checking for OpenCL GPU acceleration compatibility with AI models... OpenCL is available on this system. OpenCL acceleration device is available. Using device: Intel(R) Arc(TM) Graphics Loading test image... Preparing the image for processing... Initializing face detection model... Running face detection... Initializing feature extraction model... Preparing face for feature extraction... Extracting face features... All tests completed successfully! Test completed successfully! Your system can use GPU acceleration for the AI models. ``` I run nvtop and it is not showing my NVIDIA graphics card as being used. So I may have a misconfiguration that cropped up and will need to debug later. I'm not sure if this is helpful, but here is what my terminal logs back when I launch digikam and run a "Recognize faces only" scan on a few albums where I have not yet recognized faces: ``` $ prime-run digikam digikam: /usr/lib/libgphoto2_port.so.12: no version information available (required by /usr/lib/libdigikamgui.so.8.7.0) digikam.facesengine: FaceClassifier::loadTrainingData: exception: OpenCV(4.12.0) /usr/include/opencv4/opencv2/core/mat.inl.hpp:921: error: (-215:Assertion failed) (unsigned)(pt.x * DataType<_Tp>::channels) < (unsigned)(size.p[1] * channels()) in function 'at' qt.multimedia.ffmpeg: Using Qt multimedia with FFmpeg version n7.1.1 GPL version 3 or later kf.xmlgui: Unhandled container to remove : Digikam::DigikamApp ``` The output is exactly the same when I do not launch with prime, `command digikam`. But if digikam is not actually using my discrete GPU, I guess I wouldn't expect anything different anyway. -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #3 from [email protected] --- If the AppImage work fine, so it's a packaging problem from Arch Linux. Report this problem to Arch team. By GPU, i want mean which video card did you use exactly ? -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 [email protected] changed: What|Removed |Added Platform|Other |Arch Linux -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 --- Comment #2 from Äriölina --- >Which Linux system ? Arch KDE Plasma >Did you use the AppImage bundle ? No, but I tried it now, and the recognition seems to be working OK >Did you have a GPU card recognized for the DNN ? digikam.dnnmodelmanager: Using default backend and CPU target -- You are receiving this mail because: You are watching all bug changes.
[digikam] [Bug 506663] Face recognition finds nothing
https://bugs.kde.org/show_bug.cgi?id=506663 [email protected] changed: What|Removed |Added CC||[email protected] --- Comment #1 from [email protected] --- Which Linux system ? Did you use the AppImage bundle ? Did you have a GPU card recognized for the DNN ? Best Gilles Caulier -- You are receiving this mail because: You are watching all bug changes.
