Formulas in rpn for (RGB / RGBA / HSV / HSVA) see help below
Rmin
Rmax
R
Gmin
Gmax
G
Bmin
Bmax
B
Hmin
Hmax
H
Smin
Smax
S
Vmin
Vmax
V
Amin
Amax
A
Help Examples
Special values in rpn formulas :
X Y coordinates of the pixel who's color is currently computed
PX PY pixel coordinates of the current pixel : upper left is 0,0 , upper right PIX_DX-1,0
RADIUS ANGLE : polar coordinates of the current pixel
PIX_DX PIX_DY ULX ULY LRX LRY Rmin Rmax ... : the values you specified previously
R G B A H S V : the value of the computed color attribute. No looping references autorized.