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CMS: Color Management System. The software that converts the color information that is stored in
the input image (defined by a source profile) into an output image that has the color space
specified by a destination profile. Many different CMSs are on the market: in software programs,
in operating systems, and in printing software, including the Z6200 internal RIP.
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Source profile: a description of the color behavior of the input device
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Destination profile: a description of the color behavior of the output device
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Rendering intent: the most difficult challenge in color management is when a color in the
source gamut does not correspond directly to a color in the destination gamut. When a perfect
match is not possible, choices must be made about how to treat gamut differences. These choices
are called rendering intent. There are four different possibilities depending on the final output that
you want to achieve.
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Use Perceptual for the most pleasing final output. It is suitable for photographic content.
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Use Saturation for vivid final output. It is suitable for business graphics (charts,
presentations, and so on), but is not recommended for color matching.
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Use Relative Colorimetric for press proofing. This rendering intent provides a match for
colors that are inside both the source and destination gamuts, and minimizes differences
when a match is not possible.
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Use Absolute Colorimetric for press proofing (like Relative Colorimetric), when you also
want to simulate the color of the source’s paper.
The following are the most commonly used device color spaces and profiles:
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RGB mode:
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sRGB (sRGB IEC61966-2.1): for images that typically originate from consumer digital
cameras and scanners and from the Web
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Adobe® RGB (1998): for images that typically originate from professional digital cameras
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Specific RGB device space: for images that are coming from or going to a specific RGB
device that has been profiled
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CMYK mode:
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SWOP: Specifications for Web Offset Publications, a set of press standards that have been
defined for a typical U.S. press and for different types of paper stock
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ISO 12647-2: a set of press standards that have been defined by the International
Standards Organization for different types of paper. Some examples of the definitions
include Coated, Uncoated, and so on.
98 Chapter 7 Color management ENWW
Color management