Implements the redux version of smart sharpening
Tutorial: http://www.gimpguru.org/Tutorials/SmartSharpening2/
The Refocus plugin from http://hphsite.de/refocus/ must be installed seperately if you want to use this option in the script.
Implement a separate sharpening for lights and shadows
Tutorial (in German, for Photoshop): http://thomas-stoelting.de/photoshop.html
Implement a highpass filter sharpening
Infos about highpass sharpening:
http://www.gimp.org/tutorials/Sketch_Effect/
http://www.retouchpro.com/forums/showthread.php?s=&threadid=3844&highlig...