[digikam] [Bug 316898] New: To each face, store poition data and correlate to "face_name Tag"

[Axel Krebs]

https://bugs.kde.org/show_bug.cgi?id=316898

            Bug ID: 316898
           Summary: To each face, store poition data and correlate to
                    "face_name Tag"
    Classification: Unclassified
           Product: digikam
           Version: 3.0.0
          Platform: Ubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Face Management
          Assignee: [hidden email]
          Reporter: [hidden email]

when detecting _several_ faces on _one_ pic, the position of _each_ face should
be associated and stored ("somehow") persistent in absolute data.

Reason:
- if working on a pic, the pic can be divided. Up to know, the faces info stay
with both pics- which is wrong, potentially.
- if showing _one_ face of several, one still sees all faces names, even in
this extreme case wher only ony face is visible in the observed area.



Reproducible: Always

Steps to Reproduce:
1. run face recognition
2. observe the above mentioned appearences
3.


Expected Results:  
every face should have its own (persistent) position information

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=316898

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[hidden email]
            Summary|To each face, store poition |Store face area position as
                   |data and correlate to       |persistent data in database
                   |"face_name Tag"             |

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=316898

--- Comment #1 from Gilles Caulier <[hidden email]> ---
Marcel,

Face area positions are not already stored as persistent in database ?

Gilles

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[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=316898

--- Comment #2 from Marcel Wiesweg <[hidden email]> ---
Yes, it is always the tag (the person) and the area on the photo

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=316898

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Store face area position as |Manage face area position
                   |persistent data in database |as persistent data in
                   |                            |database accordingly with
                   |                            |image manipulations

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[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=316898

Mario Frank <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[hidden email]

--- Comment #3 from Mario Frank <[hidden email]> ---
(In reply to Marcel Wiesweg from comment #2)
> Yes, it is always the tag (the person) and the area on the photo

Marcel is right. The face area is persistent in database. For every face,
there is an entry with image id, face tag id and the tag region/autodetected
face as absolute coordinates (x,y, width and heigth) to the specific image.

Is this still valid? What behaviour is exactly expected?

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[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=316898

--- Comment #4 from [hidden email] ---
Mario,

Imagine a photo with a face already registered as face tag.

Open the image, and crop it. The face area is changed. The expected behavior is
to recompute face area accordingly with manipulations. The can be a perspective
adjustment, a flip, a rotation, a crop, etc.

And this must be true also with BQM tools.

So this can be a complex patch to do.

Gilles

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[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=316898

[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Faces-Management            |Database-Faces

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