To convert
from one color gamut to another is a simple procedure. Each phosphour color
can be represented by a combination of the CIE XYZ primaries, yielding the
following transformation from RGB to CIE XYZ:
The transformation
yields the color on monitor 2 which is equivalent
to a given color on monitor 1.
Conversion to-and-from printer gamuts is difficult. A first
approximation is as follows:
C = 1 - R
M = 1 - G
Y = 1 - B
The fourth color, K, can be used to replace equal amounts of CMY:
yields the color on monitor 2 which is equivalent
to a given color on monitor 1.
Conversion to-and-from printer gamuts is difficult. A first
approximation is as follows: