mix_rgb
Arguments:
- a11,a12,a13,a21,a22,a23,a31,a32,a33
Description:
Apply 3x3 specified matrix to RGB colors of selected images.
Default values:
a11=1, a12=a13=a21=0, a22=1, a23=a31=a32=0 and a33=1.
This command has a tutorial page.
Example of use:

Command:
image.jpg +mix_rgb 0,1,0,1,0,0,0,0,1

Command:
image.jpg +mix_rgb 0,1,0,1,0,0,0,0,1