Script-Fu -> Sharpness -> Warp Sharps

This is an adjustable script
which gives an image a slightly sculpted or painterly look...
eliminating some detail "noise"

This implements a method to sharpen images described by Joern Loviscach in the german computer magazine c't, 22/1999.

Basically it "squeezes" unsharp edges. This method is a simplified Version of an algorithm by Nur Arad and Craig Gotsman:
"Enhancement by Image-Dependent Warping",
IEEE Transactions on Image Processing, 1999, Vol. 8, No. 8, S. 1063

Script-FU > Sharpness > Warp Sharp

;  This script should be placed 
;  in the user or system-wide script folder.
;
;  Windows Vista/7/8/10)
;  C:\Program Files\GIMP 2\share\gimp\2.0\scripts
;  or
;  C:\Users\YOUR-NAME\.gimp-2.8\scripts
; 
;  Windows XP
;  C:\Program Files\GIMP 2\share\gimp\2.0\scripts
;  or
;  C:\Documents and Settings\yourname\.gimp-2.8\scripts   
; 
;  Linux
;  /home/yourname/.gimp-2.8/scripts  
;