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

[Matthias Wieser]

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http://bugs.kde.org/show_bug.cgi?id=115753         




------- Additional Comments From mwieser gmx de  2006-05-23 18:40 -------
That's something totally different:
Refocus is a convolution filter.
Unsharp mask is a simple sharpening filter which works by enhancing edge contrast. It's the sharpening filter of choice for "everyday" images. But it's quality can even improved by only applying it to the luma channel. There are many gimp/photoshop/... howtos about this. This can be done with scrips, but digikam does not support scripts. So it would be very convient to include this option into the unsharp mask filter.