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212 ADOBE ILLUSTRATOR CS2
User Guide
Document profiles
Define the specific RGB or CMYK color space of a document. By assigning, or tagging, a
document with a profile, the application provides a definition of actual color appearances in the document. For
example, R=127, G=12, B=107 is just a set of numbers that different devices will display differently. But when tagged
with the AdobeRGB color space, these numbers specify an actual color or wavelength of light; in this case, a specific
color of purple.
When color management is on, Adobe applications automatically assign new documents a profile based on Working
Space options in the Color Settings dialog box. Documents without associated profiles are known as
untagged and
contain only raw color numbers. When working with untagged documents, Adobe applications use the current
working space profile to display and edit colors. (See “About color working spaces” on page 216.)
To view the current document profile, select Document Color Profile in the status bar.
A
B
C
D
Managing color with profiles
A.
Profiles describe the color spaces of the input device and the document.
B.
Using the profiles’ descriptions, the color management system
identifies the document’s actual colors.
C.
The monitor’s profile tells the color management system how to translate the numeric values to the
monitor’s color space.
D.
Using the output device’s profile, the color management system translates the document’s numeric values to the color
values of the output device so the actual colors are printed.
About monitor calibration and characterization
Profiling software such as Adobe Gamma can both calibrate and characterize your monitor. Calibrating your
monitor brings it into compliance with a predefined standard; for example, adjusting your monitor so that it displays
color using the graphics arts standard white point color temperature of 5000 degrees Kelvin.
Characterizing your
monitor simply creates a profile that describes how the monitor is currently reproducing color.
Monitor calibration involves adjusting the following video settings, which may be unfamiliar to you.
Brightness and contrast
The overall level and range, respectively, of display intensity. These parameters work just as
they do on a television. Adobe Gamma helps you set an optimum brightness and contrast range for calibration.
Gamma
The brightness of the midtone values. The values produced by a monitor from black to white are
nonlinear—if you graph the values, they form a curve, not a straight line. Gamma defines the value of that curve
halfway between black and white.