[Bug 279033] New: crash while scanning faces and assigning tags to unknown faces

https://bugs.kde.org/show_bug.cgi?id=279033

           Summary: crash while scanning faces and assigning tags to
                    unknown faces
           Product: digikam
           Version: 2.0.0
          Platform: Unlisted Binaries
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: Face Detection
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           2.0.0 (using KDE 4.6.2)
OS:                Linux

I was scanning my collection for faces from the people tab. During the scanning
I already started to assign tags to the faces that were found.
This often lead to digikam's crash.

Other issues include problems with the focus leaving the field to enter the tag
belonging to the face. This makes it hard to multitask the scanning and
training of the scanner.

BTW, why is everyone assigned the same "Unknown" tag, instead of a numbered
unknown tag for each distinct face that is found?
I'd expect the Unknown collection to change when the face detection has learnt
about a new face...


Reproducible: Always

Steps to Reproduce:
scan for faces in entire collection and start giving tags to unknown faces at
the same time.

Actual Results:  
crash

Expected Results:  
no crash

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=279033


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |[hidden email]
         Resolution|                            |WAITINGFORINFO




--- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2011-08-01 13:41:27 ---
We need a GDB backtrace to investiguate...

Gilles Caulier

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[Pierre Hanser]

https://bugs.kde.org/show_bug.cgi?id=279033


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--- Comment #2 from Pierre Hanser <hanser club-internet fr>  2011-08-01 14:09:13 ---
I'm not sure that a handfull of unknown is better than a single one.
If you have crowd pictures, you will never know the names.
i'm quite happy with only 1 unknown

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--- Comment #3 from Simon Oosthoek <s oosthoek xs4all nl>  2011-08-01 15:03:51 ---
@Gilles
Do I need a specially built version of digikam to provide that? (I don't think
I want to build my own...)

@Pierre.
I'm not interested in how many unknowns are found, as long as when I identify a
specific unknown, which belongs to several identified similar faces, all of
those instances will now be recognised as belonging to the identified person.
This is much easier to do if faces are already grouped according to similarity,
even though the name for the similar faces is still unknown. (adding a name
doesn't make the faces easier to identify!)

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--- Comment #4 from Gilles Caulier <caulier gilles gmail com>  2011-08-01 15:34:07 ---
run digiKam through GDB. Install digiKam debug package before of course

Use it and when i crash, enter "bt" command to get the trace.

Gilles Caulier

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[Marcel Wiesweg]

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--- Comment #5 from Marcel Wiesweg <marcel wiesweg gmx de>  2011-08-03 19:02:13 ---
most probably a duplicate of infamous 269720 & friends

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--- Comment #6 from Simon Oosthoek <s oosthoek xs4all nl>  2011-08-04 08:27:27 ---
The problem may not be related to the scanning, I had a crash yesterday when I
was just identifying faces...

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--- Comment #7 from Simon Oosthoek <s oosthoek xs4all nl>  2011-08-08 16:04:26 ---
Created an attachment (id=62667)
 --> (http://bugs.kde.org/attachment.cgi?id=62667)
backtrace

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[Gilles Caulier-4]

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--- Comment #8 from Gilles Caulier <[hidden email]> ---
New digiKam 4.11.0 is available :

https://www.digikam.org/node/740

Can you reproduce the problem with this release ?

Gilles caulier

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--- Comment #9 from Gilles Caulier <[hidden email]> ---
digiKam 4.12.0 is out :

https://www.digikam.org/node/741

We need a fresh feedback using this release please...
Thanks in advance.

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[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Version Fixed In|                            |5.1.0
         Resolution|WAITINGFORINFO              |FIXED

--- Comment #10 from [hidden email] ---
With next 5.1.0 release, a lots of investigations have be done around OpenCV
face module integration with digiKam Face Engine.
See bug #365202 history for details.
I close this file now. Don't hesistate to re-open if necessary.
Gilles Caulier

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