[Digikam-devel] [Bug 115753] New: Option to apply unsharp masking to luma channel only

[Dik Takken]

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http://bugs.kde.org/show_bug.cgi?id=115753         
           Summary: Option to apply unsharp masking to luma channel only
           Product: digikamimageplugins
           Version: 0.7.3
          Platform: Gentoo Packages
        OS/Version: Linux
            Status: NEW
          Severity: wishlist
          Priority: NOR
         Component: Unsharp
        AssignedTo: digikam-devel kde org
        ReportedBy: d.h.j.takken phys uu nl


Version:           0.7.3 (using KDE KDE 3.4.1)
Installed from:    Gentoo Packages
OS:                Linux

Applying an unsharp mask effect to a digital image (photo, scan, ...) often results in amplification of unwanted chromatic noise. So, I always use the GIMP to split the image into seperate HSV layers and apply the unsharp mask only to the luma (V) channel. After merging back to RGB, it looks really good.

Please add an option to the unsharp mask dialog to only apply the effect to the luma channel. Maybe the option can be called "suppress color noise" or something similar.