GIMPHELP.ORG
a tribute and my humble
contribution of brushes,
scripts and tips for the GNU
Image Manipulation Program

Script-Fu -> Change Shadows-Highlights

This is an adjustable script,
which makes it easy to adjust the contrast in either the shadows or highlights of an image.

Gives better results than tinkering with curves by using a couple tricky bits I found in a script-fu called "Vivid saturation" by Dennis Bond...

Dialog

Before

After

Download

210_contrast_change-shadow-highlights.scm

;  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