Screen
Color Space Projection
Fig.1
RGB as XYZ (x=R, y=G, z=B)
Fig.2
a. Rotate the line (0,0,0)-(1,1,1) of Fig.1 to fit Z axis
b. Enlarge XY space
Fig.3
Convert RGB to HSV, Polar coordinate. (x=S*cos(H), y=S*sin(H), z=V)
Fig.4
HSV as XYZ (x=H, y=S, z=V)
Fig.5
CMY(K) as XYZ (x=C, y=M, z=Y)
Ignore 'K'
Fig.6
a. Rotate the line (0,0,0)-(1,1,1) of Fig.5 to fit Z axis
b. Enlarge XY space
c. Enlarge Z based on K value
Histogram
RGB
HSV