[digikam] [Bug 321296] New: opencv error message during face scan

[Simon Bühler]

https://bugs.kde.org/show_bug.cgi?id=321296

            Bug ID: 321296
           Summary: opencv error message during face scan
    Classification: Unclassified
           Product: digikam
           Version: 3.3.0
          Platform: Compiled Sources
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Face Management
          Assignee: [hidden email]
          Reporter: [hidden email]

hi,

during scan i get this:


digikam(25201)/KFACE KFaceIface::OpenCVFaceDetector::cascadeResult:
detectMultiScale: image size  800   532  searchIncrement  1.1  grouping  3
flags  1  min size  26   26
OpenCV Error: Bad argument (This LBPH model is not computed yet. Did you call
the train method?) in predict, file
/var/tmp/portage/media-libs/opencv-2.4.5/work/opencv-2.4.5/modules/contrib/src/facerec.cpp,
line 822
digikam(25201)/KFACE: cv::Exception:
/var/tmp/portage/media-libs/opencv-2.4.5/work/opencv-2.4.5/modules/contrib/src/facerec.cpp:822:
error: (-5) This LBPH model is not computed yet. Did you call the train method?
in function predic


Reproducible: Sometimes

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=321296

Gilles Caulier <[hidden email]> changed:

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          Component|Face Management             |libkface

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=321296

--- Comment #1 from Gilles Caulier <[hidden email]> ---
Which OpenCV release do you use ? Go to Help/Components Info for details.

Gilles Caulier

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[Gilles Caulier-4]

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--- Comment #2 from Gilles Caulier <[hidden email]> ---
Oups, i just see : OpenCV 2.4.5...

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[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=321296

--- Comment #3 from Marcel Wiesweg <[hidden email]> ---
Could it simply be that you really did not train anything yet? All is new with
libkface, so chances are you did not rebuild the training data, nor confirm new
faces.

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[Tito]

https://bugs.kde.org/show_bug.cgi?id=321296

Tito <[hidden email]> changed:

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--- Comment #4 from Tito <[hidden email]> ---
I get the exact same errors. Same opencv version. I scan for faces and confirm
some by adding a tag to them. Although some others photos are nearly the same
(shot with high frame rate) the recognition status is given as "completed"
after 0 or 1 seconds and none of the faces are identified.
Deleting the libkface database and starting all over does not change anything.

digikam 3.3.0-beta2 on Slackware-current, all compiled from source.

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[Tito]

https://bugs.kde.org/show_bug.cgi?id=321296

--- Comment #5 from Tito <[hidden email]> ---
With digikam-3.3.0rc3 the error does not occur no more for me. digikam also
recognizes some faces after training now. :)

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=321296

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
   Version Fixed In|                            |3.3.0
         Resolution|---                         |FIXED

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[Slobodan Simic]

https://bugs.kde.org/show_bug.cgi?id=321296

Slobodan Simic <[hidden email]> changed:

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--- Comment #6 from Slobodan Simic <[hidden email]> ---
I have same errors with openCV even with digikam 3.3.0 taken from kubuntu-ppa
repository
 here is console output

OpenCV Error: Bad argument (This LBPH model is not computed yet. Did you call
the train method?) in predict, file
/build/buildd/opencv-2.4.5+dfsg/modules/contrib/src/facerec.cpp, line 822
digikam(2793)/KFACE: cv::Exception:
/build/buildd/opencv-2.4.5+dfsg/modules/contrib/src/facerec.cpp:822: error:
(-5) This LBPH model is not computed yet. Did you call the train method? in
function predict

and it goes over and over again...
percentage of process done is 14% and stays there and I can continue working in
digikam.

Is it digikam (openCV) or package error?

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