Gimp Plugin - Adjustment Layer Script For Gimp
Posted by phoenix 819 days ago http://registry.gimp.org
This script generates two adjustment layers from the two layers on the top, A is the original image layer, B the modified (e.g. sharpened) one on top:
A - B = C
B - A = D
A - C + D = B
Now you can apply further editing and "switch on/off" the adjustment by switching the visibility of the subtractive and the additive layer. Also you can change the modification intensity by changing the intensity of these two layers.
