Icon-Compositor 0.0
Monochrome

monochrome(image)

The monochrome function may be used to turn color images into grayscale.

icomp 'scale( monochrome( dragon.png ), 0.6) over center document.png ' -o monochrome-dragon.png
     
This isn't very exciting by itself, but it is the first necessary step to creating differently colored dragons. See the multiply operator for how.