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Most color images are overlays of three greyscale images. It is possible to
combine any number 
of channels to assign values from 
to 
to
each matrix pixel. This is often performed for satellite images. Three channels
can be combined to form a red-green-blue (RGB) colorspace, respectively. For
the presentation on a video screen the RGB colorspace is often reduced to
values between and since many screens can render only 
colors.
Fig. 3 shows a color image of the Mandelbrot set.
Figure 3: Color image of the Mandelbrot set
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