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CMS: CMS stands for Color Management System. It is the application that converts the color
information stored in the input image, which has the color space defined by a source profile, into
an output image that has the color space specified by a destination profile. There are many different
CMSs on the market: there are CMSs in applications, in operating systems and in printing software
provided by printer manufacturers (in our case the HP Designjet Z3200 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. As a perfect match is not
possible, there are different types of choices that can be made about how to treat gamut differences
and these are called rendering intent. There are four different possibilities depending on the final
output you want to achieve.
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Use Perceptual for the most pleasing final output from your original RGB image. It is suitable
for photographic content.
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Use Saturation for vivid final output. It is suitable for business graphics (charts, presentations,
etc.), 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.
TIP: You can use "soft proofing" options in your application (such as Photoshop and InDesign) to view
the result of each rendering intent.
The most commonly used device color spaces and, therefore, profiles are:
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RGB mode:
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sRGB (sRGB IEC61966-2.1): for images originating typically from consumer digital cameras
and scanners and in general from the Web
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Adobe RGB (1998): for images originating typically from professional digital cameras
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Specific RGB device space: for images coming from or going to a specific RGB device that
has been profiled. The HP Designjet Z3200 has the capability to measure itself and generate
ENWW The solution: color management 57
Color management