Bug 389031

Summary:	Scanning collection for faces causes produces lots of OpenCV errors
Product:	[Applications] digikam	Reporter:	Nick Anderson <nick+kde-bug-tracker>
Component:	Faces-Recognition	Assignee:	Digikam Developers <digikam-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	caulier.gilles, metzpinguin
Priority:	NOR
Version First Reported In:	5.8.0
Target Milestone:	---
Platform:	Appimage
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:	7.0.0
Sentry Crash Report:

Description Nick Anderson 2018-01-15 22:44:42 UTC

Using the 5.8.0 appimage on Ubuntu 17.10 I get lots of OpenCV Errors when scanning my collection for faces.

#+BEGIN_EXAMPLE
OpenCV Error: Bad argument (This LBPH model is not computed yet. Did you call the train method?) in predict, file /b/dktemp/digikam-v5.8.0/core/libs/facesengine/recognition-opencv-lbph/facerec_borrowed.cpp, line 383
digikam.facesengine: cv::Exception: /b/dktemp/digikam-v5.8.0/core/libs/facesengine/recognition-opencv-lbph/facerec_borrowed.cpp:383: error: (-5) This LBPH model is not computed yet. Did you call the train method? in function predict
#+END_EXAMPLE

Comment 1 Maik Qualmann 2018-01-16 19:18:22 UTC

This error message is "normal". You have not assigned a name to any found face yet. The database for the histograms is still empty. Do not use for face search "find faces and recognize", only "find faces".

Maik

Comment 2 Nick Anderson 2018-01-16 20:52:36 UTC

(In reply to Maik Qualmann from comment #1)
> This error message is "normal". You have not assigned a name to any found
> face yet. The database for the histograms is still empty. Do not use for
> face search "find faces and recognize", only "find faces".
> 
> Maik

OK, thanks

Comment 3 caulier.gilles 2019-12-23 14:50:20 UTC

Not reproducible with 7.0.0