DK 8.5 won't detect faces: OPENCV/DNN exception

[Maik Qualmann]

Hi Steven,

 I'll connect you to this current bug report. It might be related.

https://bugs.kde.org/show_bug.cgi?id=498024

Maik

Am Sonntag, 29. Dezember 2024, 20:07:20 Mitteleuropäische Normalzeit schrieb 
Steven Robbins:
> Hi,
> 
> I've begun using Digikam 8.5 after a couple years not really using DK very
> much.  I wanted to detect & recognize faces.
> 
> I read in the DK manual that "Beginning with digiKam 8.5.0, YuNet is the
> recommended model for face detection, and SFace is recommended for face
> recognition."    So I have set detection model to YuNet (Accuracy 7, Face
> size Large) and scanned a collection.  No faces were detected.
> 
> In the console window I see the following logged multiple times (probably
> once per image file):
> 
> [ERROR:3 at 204.105] global ./modules/dnn/src/net_impl.cpp (1168)
> getLayerShapesRecursively OPENCV/DNN: [Eltwise]:(onnx_node!Add_44):
> getMemoryShapes() throws exception. inputs=2 outputs=1/1 blobs=0
> [ERROR:3 at 204.105] global ./modules/dnn/src/net_impl.cpp (1174)
> getLayerShapesRecursively     input[0] = [ 1 64 29 38 ]
> [ERROR:3 at 204.105] global ./modules/dnn/src/net_impl.cpp (1174)
> getLayerShapesRecursively     input[1] = [ 1 64 28 38 ]
> [ERROR:3 at 204.105] global ./modules/dnn/src/net_impl.cpp (1178)
> getLayerShapesRecursively     output[0] = [ 1 64 29 38 ]
> [ERROR:3 at 204.105] global ./modules/dnn/src/net_impl.cpp (1184)
> getLayerShapesRecursively Exception message: OpenCV(4.6.0)
> ./modules/dnn/src/ layers/eltwise_layer.cpp:251: error: (-215:Assertion
> failed) inputs[vecIdx][j] == inputs[i][j] in function 'getMemoryShapes'
> 
> I'm using Debian/unstable build of Digikam.
> 
> Am I doing something wrong here?
> 
> I should add a bit more history.
> 
> 1. Since I hadn't been using DK for years, I used the Tools/Maintenance
> window to run database cleaning; I selected all the four options.  I
> believe I also selected Rebuild Thumbnails.  I don't think I selected
> anything else, but possibly I did also run Rebuild Finger-prints.
> 
> 2. I had run face detection/recognition years ago.  There were a lot of
> people tags present -- including Unconfirmed, Unknown, and Ignored. 
> However, I'm pretty sure there were other people I had tagged that no
> longer have a tag present.
> 
> 3. Before I found the console logs, I went through a few rounds of fixing
> tags and re-scanning the Face Recogition.  I added a bunch more tags -
> which now have a little thumbnail which is nice.  One existing older tag
> that survived just has a "smiley face" icon, and no images are shown in the
> People view.  In the Tags view, however, there are four images under this
> tag.
> 
> 4. I wasn't getting far so I went into the Maintenance and selected Reset
> and clear all faces and training.  Now I have just six face detections,
> which I have tagged.
> 
> Thanks,
> -Steve