Gimp: Color gray decompose script

Hi folks,

so here is the next gimp script, color gray decompose.

It converts your current layer (or view) into two layers, one containing the gray values and one containing the colors. With this decomposition it's possible to sharpen without color modification (like in LAB sharpen) or to alter the contrast of the image without altering the colors, i.e. the saturation. The other way round on can work on the saturation without changing the luminocity. To increase saturation, just pull the contrast up on the color layer, or use a S-curve on the color layer. When done, a simple merge down of the upper layer will give you your original image back...

Drop me a line if you like it or if you have ideas to improve it...

greets mike