QMS Magicolor CX, Руководство пользователя

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Other Methods
of Color
Control
QMS magicolor CX User's Guide 2-10
Other Methods of Color
Control
Color Matching
A major concern in the color publishing industry today is keeping
color consistent across devices with different color models. For exam-
ple, when you scan a color photograph, the scanner sends the image
data to the computer in an RGB (Red-Blue-Green) format. The com-
puter then converts the data into another RGB format to display it on
the monitor. When the image data is sent to the printer, it is converted
into CMYK (Cyan-Magenta-Yellow-blacK) format by the printer driver
or application. Because of these conversions, a color output device
(like your printer) may produce colors dramatically different from
those seen on the computer screen, or in the original image.
To keep colors more consistent, you can use color matching, which
uses software to describe colors for different devices in a common
language to make sure that color is produced in the same shade on
all devices.
Color Matching with a Color Management System
Color management systems (CMSs) work by translating color infor-
mation 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.