[Digikam-devel] libkface: recognize without trained faces

Gilles Caulier caulier.gilles at gmail.com
Mon Jul 28 06:42:58 BST 2014

Hi Tobias,

For me, I agree for this change but API doc must explain well the
returned value in all contexts.



2014-07-27 23:26 GMT+02:00 Tobias Leupold <tobias.leupold at web.de>:
> Hi List/Gilles/Marcel!
> We're working on libkface inclusion here at KPhotoAlbum at the moment (not
> just me anymore :-). We found one thing that should probably handled by
> libkface itself. It's more a cosmetic thing, but I think it wouldn't hurt to
> change this.
> If one issues a face recognition and no face has been trained yet, libkface
> prints an error message to the console:
>> OpenCV Error: Bad argument (This LBPH model is not computed yet. Did you
>> call the train method?) in predict, file
>> ...recognition-opencv-lbph/facerec_borrowed.cpp, line 384
> This message disappears when the first face has been trained. I think it would
> be nice if libkface would check for that itself and not print an error
> message, but simply return nothing (as it already does at the moment).
> What do you think?
> Yours, Tobias
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