
376 A Computational Introduction to Digital Image Processing, Second Edition
Value: The degree of brightness: a well-lit color has high intensity; a dark color has low
intensity.
This is a more intuitive method of describing colors, and as the intensity is independent of
the color information, this is a very useful model for image processing. We can visualize
this model as a cone, as shown in Figure 13.5.
Value
0
1
White Red
Black
Cyan
Green Yellow
MagentaBlue
Saturation
0 1
FIGURE 13.5: The color space HSV as a cone
Any point on the surface represents a purely saturated color. The saturation is thus
given as the relative distance to the surface from the central ...