[Digikam-devel] [Bug 290196] New: PATCH: Improvements for Levels adjust tool

[Matthias Welwarsky]

https://bugs.kde.org/show_bug.cgi?id=290196

           Summary: PATCH: Improvements for Levels adjust tool
           Product: digikam
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: Image Editor
        AssignedTo: digikam-devel at kde.org
        ReportedBy: matze at welwarsky.de


Created an attachment (id=67257)
 --> (http://bugs.kde.org/attachment.cgi?id=67257)
Patch implementing the described improvement

Version:           unspecified (using KDE 4.7.3) 
OS:                Linux

    Enable Color Channels histogram type in Levels tool

    This patch enables the "Color Channels" histogram type in the Levels
    tool. It is helpful when adjusting luminosity to observe if any of the
    color channels clip, which leads to false highlight colors.

    The patch also implements a second function:
    if Color Channels is selected, Black and White tone pickers work on all
    of the color channels simultaneously instead of having to iterate over
    R, G and B. It is very helpful for removing the color mask of a scanned
    film negative.


Reproducible: Didn't try



Expected Results:  
Vastly improved functionality of Levels adjustment tool after applying the
patch
:-)

The patch applies to the master branch of digigkam-sc core.git. It was created
with "git format-patch" and can simply be applied with "git am
0001-Enable-Color-Channels-histogram-type-in-Levels-tool.patch"

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