[Bug 275670] New: Face preview image incorrect on 'rotated' images

https://bugs.kde.org/show_bug.cgi?id=275670

           Summary: Face preview image incorrect on 'rotated' images
           Product: digikam
           Version: 2.0.0
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Face Detection
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


I think that if a source image is rotated by the camera, the position of the
preview image might be mirrored vertically.
A portrait picture of someone, when viewed under View Image, shows a white
rectangle around her face.
When viewed under thumbnails, it shows a preview of her cleavage.
Similarly on another person when standing, and the image is in portrait mode,
view image shows the rectangle around the face. In thumbnail mode, zoomed in on
her thighs. (and it would happen to be an image where she is wearing shorts)
Images which are in landscape mode seem to be OK.
Not sure how to create a 'test' case for this.

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--- Comment #1 from Gareth <gareth glaccum btopenworld com>  2011-06-15 00:15:49 ---
It might occur only with one 'face' preview per image.
Viewing an image which had a couple in it, in portrait mode, one of them was
tagged correctly, and you could see the face in the preview. The other, the
face preview was of their knees. (However when viewed under View Image, both
rectangles were on the faces).

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[Marcel Wiesweg]

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--- Comment #2 from Marcel Wiesweg <marcel wiesweg gmx de>  2011-07-11 17:03:47 ---
You are running code from current git and can reproduce this problem when
removing faces and rescanning from a sample image?
Face detection is performed on the rotated image, because faces need to be
upright for the detection core, and stored for the rotated image, so there is
no good reason it should work for one face and not for another.

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[Gilles Caulier-4]

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Gilles Caulier <[hidden email]> changed:

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--- Comment #3 from Gilles Caulier <caulier gilles gmail com>  2011-12-14 13:48:39 ---
Gareth,

Can you reproduce the dysfunction using digiKam 2.4 ?

Gilles Caulier

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[Samuel Gilbert]

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--- Comment #4 from Samuel Gilbert <[hidden email]> ---
Created attachment 72465
  --> https://bugs.kde.org/attachment.cgi?id=72465&action=edit
Example of the Digikam 2.7.0 Interface showing the Bug

I confirm that this bug is still present in Digikam 2.7.0.

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
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            Version|2.0.0                       |2.7.0

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--- Comment #5 from Marcel Wiesweg <[hidden email]> ---
Can you send me a sample image for testing? Via private mail is ok, if too
large to attach.

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             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WAITINGFORINFO

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[Gilles Caulier-4]

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--- Comment #6 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 ?

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[Gilles Caulier-4]

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--- Comment #7 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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--- Comment #8 from [hidden email] ---
This file still valid using last stable 5.0.0 release ?
Gilles Caulier

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--- Comment #9 from [hidden email] ---
We need feedback with last digiKam AppImage Linux Bundle:

https://drive.google.com/open?id=0BzeiVr-byqt5Y0tIRWVWelRJenM

Gilles Caulier

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--- Comment #10 from [hidden email] ---
This problem still reproducible using digiKam AppImage bundle 5.4.0 pre release
?

It available at this url :

https://drive.google.com/drive/folders/0BzeiVr-byqt5Y0tIRWVWelRJenM

Gilles Caulier

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--- Comment #11 from [hidden email] ---
digiKam 5.5.0 is released officially

https://download.kde.org/stable/digikam/

...and new 5.6.0 pre-release as bundle is available here :

https://drive.google.com/drive/folders/0BzeiVr-byqt5Y0tIRWVWelRJenM

Please check if this problem still reproducible with these versions.

Thanks in advance

Gilles Caulier

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--- Comment #12 from [hidden email] ---
digiKam 5.6.0 is now release and available as bundle for Linux, MacOS and
Windows.

Can you check if problem still exists with this version ?

Thanks in advance

Gilles Caulier

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