[Bug 226846] New: Issues with color management and color profiles

https://bugs.kde.org/show_bug.cgi?id=226846

           Summary: Issues with color management and color profiles
           Product: digikam
           Version: unspecified
          Platform: Mandriva RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:            (using KDE 4.3.2)
OS:                Linux
Installed from:    Mandriva RPMs

Dear developers

I have observed an important issue with the color management of digikam with
jpg photos. Here is the problem (see also attached files)

When I preview an image, I get two versions, one blueish and one with normal
colors (at least on my screen, which is calibrated and profile applied with
xcalib)

When I edit the photo (F4) I get a warning that the embedded color profile and
the working color profile are not the same.

If I do not convert it, I still have a blueish photo. If I convert it I do get
the right colors.

But the issue is that the embedded color profile and the working color profile
are exactly the same

(here is a copy-paste of the profiles when I click on info)
Embedded color profile

File name:  (ICC Color Profile Information)

>>> Header <<<

Rendering Intent : Perceptual
Profile Version : 34603008
Profile ID : 0
Name : IEC 61966-2.1 Default RGB colour space - sRGB
Model : IEC 61966-2.1 Default RGB colour space - sRGB
Manufacturer : IEC http://www.iec.ch
Information : sRGB IEC61966-2.1 Copyright (c) 1998 Hewlett-Packard Company
WhitePoint : D65 (daylight)
Device Class : Display device
Description : sRGB IEC61966-2.1
Copyright : Copyright (c) 1998 Hewlett-Packard Company
Connection Space : Unknown
Color Space : RGB
CMM Flags : 0

Working color profile

File name:  (ICC Color Profile Information)

>>> Header <<<

Rendering Intent : Perceptual
Profile Version : 34603008
Profile ID : 0
Name : IEC 61966-2.1 Default RGB colour space - sRGB
Model : IEC 61966-2.1 Default RGB colour space - sRGB
Manufacturer : IEC http://www.iec.ch
Information : sRGB IEC61966-2.1 Copyright (c) 1998 Hewlett-Packard Company
WhitePoint : D65 (daylight)
Device Class : Display device
Description : sRGB IEC61966-2.1
Copyright : Copyright (c) 1998 Hewlett-Packard Company
Connection Space : Unknown
Color Space : RGB
CMM Flags : 0

Thank you

Alex

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--- Comment #1 from Alexios Beveratos <alexios beveratos com>  2010-02-14 17:24:58 ---
Created an attachment (id=40770)
 --> (http://bugs.kde.org/attachment.cgi?id=40770)
Different color interpretention

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|general                     |Color Management




--- Comment #2 from Gilles Caulier <caulier gilles gmail com>  2010-02-14 17:26:04 ---
Which digiKam version you use. Try 1.1.0...

Gilles Caulier

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--- Comment #3 from Alexios Beveratos <alexios beveratos com>  2010-02-14 17:28:22 ---
Sorry,

I used digikam 1.0.0

will try 1.1.0 and keep you informed

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                 CC|                            |[hidden email]
            Version|unspecified                 |1.0.0




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--- Comment #4 from Marcel Wiesweg <marcel wiesweg gmx de>  2010-02-14 22:42:21 ---
Please give us the affected photo.
Was it edited with an older digikam version, about one year ago?

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--- Comment #5 from Alexios Beveratos <alexios beveratos com>  2010-02-14 23:05:23 ---
I was unable to compile 1.1.0 version to check, but here is the original photo
that I uploaded

Yes it was created with an older version of digikam, since the photo is dated
from Nov 2008

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--- Comment #6 from Alexios Beveratos <alexios beveratos com>  2010-02-14 23:06:19 ---
Created an attachment (id=40776)
 --> (http://bugs.kde.org/attachment.cgi?id=40776)
Original photo with issue

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--- Comment #7 from Alexios Beveratos <alexios beveratos com>  2010-02-14 23:07:18 ---
Created an attachment (id=40777)
 --> (http://bugs.kde.org/attachment.cgi?id=40777)
Really the original

Here is the unedited version

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--- Comment #8 from Alexios Beveratos <alexios beveratos com>  2010-02-14 23:07:54 ---
(From update of attachment 40776)
This is a photo which I saved the profile with digikam 1.0.0

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--- Comment #9 from Marcel Wiesweg <marcel wiesweg gmx de>  2010-02-14 23:33:11 ---
The embedded profile is "sRGB Whitepoint: D50".
This is probably wrong and creates the bluish colors - D65 is normal.
You can see that the circle in the CIE Tongue is at a different place than for
normal images.
It's probably digikam's fault because such a wrong profile has been shipped
with certain older versions of libkdcraw.

There is a command line solution with exivtool available IIRC simply to strip
off the wrong profile.

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--- Comment #10 from Alexios Beveratos <alexios beveratos com>  2010-02-14 23:43:23 ---
Thank's this is compatible with the fact that almost ALL my photos need to
change their color profile :-(

But, when I look at the embedded profile, it give me D65 not D50, so maybe
that's why I did not found the problem before.
Is it a bug of version 1.0.0 ?

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           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED




--- Comment #11 from Marcel Wiesweg <marcel wiesweg gmx de>  2010-02-17 16:43:24 ---
Don't know if there was a problem in 1.0. Maybe. I can confirm that the profile
shown in the right side bar here is D50.

I close this bug report now. Have you found the right command to fix your
photos? It was discussed on digikam-user IIRC and involved exiftool.
The imagemagick solution was not the way to go.

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           What    |Removed                     |Added
----------------------------------------------------------------------------
   Version Fixed In|                            |1.2.0

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