[Bug 206712] New: Raw Import Tool: RGB (linear) provides gamma corrected output and should be named as such

[Milan Knizek]

https://bugs.kde.org/show_bug.cgi?id=206712

           Summary: Raw Import Tool: RGB (linear) provides gamma corrected
                    output and should be named as such
           Product: digikam
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:            (using KDE 4.2.4)
OS:                Linux
Installed from:    Compiled From Sources

digiKam current svn, libkdcraw7 4.2.2, kipi-plugins 0.6.0.

The Raw Import plugin for digiKam's editor offers to output the image in linear
RGB. However, it applies gamma correction to the image (in both 8 and 16 bit
colour depth) and therefore the output is not linear RGB data.

Hence the option in Colour Management tab should be renamed to "RGB (gamma
corrected)" to avoid confusion.

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[Milan Knizek]

https://bugs.kde.org/show_bug.cgi?id=206712





--- Comment #1 from Milan Knizek <knizek volny cz>  2009-09-08 07:37:38 ---
I made a small mistake: the option of Workspace in CM tab is currently named
"Raw (linear)", so possible change of the name would be "Raw (gamma
corrected)".

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=206712


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |[hidden email]
          Component|general                     |RAW files management
            Version|unspecified                 |1.0.0
         Resolution|                            |INVALID




--- Comment #2 from Gilles Caulier <caulier gilles gmail com>  2009-09-08 08:05:38 ---
Another mistake : Raw Import tool is not a kipi-plugins but a tool coded as
well in digiKam core. It's not a plugin.

To avoid gamma corrected in linear mode, use libkdcraw from trunk or from KDE
4.3.x. There is a new option to disable gamma correction.

See these screenshots for details :

http://farm4.static.flickr.com/3500/3899707834_acc9674420_o.png
http://farm3.static.flickr.com/2459/3898926077_9431fdbc5f_o.png

For me this entry is invalid...

Gilles Caulier

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[Milan Knizek]

https://bugs.kde.org/show_bug.cgi?id=206712





--- Comment #3 from Milan Knizek <knizek volny cz>  2009-09-08 21:12:55 ---
Okay, it is good that it is possible to switch off the gamma correction.

I have compiled digiKam against KDE 4.3.x in Ubuntu 9.10 and the image preview
looks like linear.

However, I would disagree that the entry is invalid -> if the user keeps the
default settings (auto brightness on), then the output workspace is not "Raw
(linear)" but gamma corrected.

Taking into consideration that it can be both gamma corrected and linear, and
that the user can select arbitrarily any camera profile (I am not sure what is
the colour transform then), a different name would avoid confusion.

E.g. "RGB (no profile assigned)". This should cover all the above mentioned
situations.

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[Gilles Caulier-4]

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--- Comment #4 from Gilles Caulier <caulier gilles gmail com>  2009-09-09 08:29:49 ---
SVN commit 1021414 by cgilles:

raw (linear) => raw (no profile)
CCBUGS: 206712


 M  +1 -1      dcrawsettingswidget.cpp  


WebSVN link: http://websvn.kde.org/?view=rev&revision=1021414

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--- Comment #5 from Gilles Caulier <caulier gilles gmail com>  2009-09-09 08:31:13 ---
SVN commit 1021415 by cgilles:

backport commit #1021414
CCBUGS: 206712


 M  +1 -1      dcrawsettingswidget.cpp  


WebSVN link: http://websvn.kde.org/?view=rev&revision=1021415

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[Gilles Caulier-4]

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--- Comment #6 from Gilles Caulier <caulier gilles gmail com>  2009-09-09 08:32:32 ---
SVN commit 1021416 by cgilles:

raw (linear) => raw (no profile)
CCBUGS: 206712


 M  +3 -3      dcrawsettingswidget.cpp  


WebSVN link: http://websvn.kde.org/?view=rev&revision=1021416

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[Milan Knizek]

https://bugs.kde.org/show_bug.cgi?id=206712





--- Comment #7 from Milan Knizek <knizek volny cz>  2009-09-10 20:44:25 ---
Thanks, Gilles, this is fine, too.

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[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Raw-Workflow                |ImageEditor-RawImport

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