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color management systems, PostScript Level 2, and PANTONE *
Color matching.
Methods of Color Matching
Color Matching with a CMS
Color management systems (CMSs) work by translating color
information from different devices into a common language. A
CMS first gets information about the way these devices create color
and the range of colors they can produce. (This information is
contained in device profiles.) Then, using this information, the
CMS maps each device's color descriptions to the CIE model,
which is an international, device-independent standard for color.
For example, to make a printer's color output look the same as the
colors on your computer monitor, a CMS translates the monitor's
RGB colors into device-independent CIE color, and then translates
from the CIE color into the printer's CMYK colors. A CMS can
warn you (or automatically adjust color) when the colors you
specify are outside the output device's range, and they can show
you on screen how the printed output will look.
The advantages of using a CMS are that you get consistent color
across all devices, and an on-screen preview of output. However,
CMSs are not portable across platforms, they can be expensive, and
they do consume processing time and power at the host.
* Pantone Inc.'s check-standard trademark for color reporduciton and color reproduction materials.
O p t i m i z i n g C o l o r O u t p u t
Chapter 7
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