Adobe illustrator 10 Manuale Utente

Profiling software such as Adobe Gamma can both characterize and calibrate your 
monitor. When you characterize your monitor, you create a profile that describes how the 
monitor is currently reproducing color. When you calibrate your monitor, you bring it into 
compliance with a predefined standard; adjusting your monitor so that it displays color 
using the graphics arts standard white point color temperature of 5000 kelvin is an 
example of calibration.

Determine in advance the standard to which you are calibrating so that you can enter the 
set of values for that standard. Coordinate calibration with your workgroup and prepress 
service provider to make sure you’re all calibrating to the same standard.

Monitor calibration involves adjusting video settings, which may be unfamiliar to you. 
A monitor profile uses these settings to precisely describe how your monitor reproduces 
color.

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 at halfway between black and white. Gamma 
adjustment compensates for the nonlinear tonal reproduction of output devices such as 
monitor tubes.

Phosphors The substance that monitors use to emit light. Different phosphors have 
different color characteristics.

White point The RGB coordinates at which red, green, and blue phosphors at full 
intensity create white.

The following guidelines can help you create an accurate monitor profile.

 You may find it helpful to have your monitor’s user guide handy while using Adobe 
Gamma.

You don’t need to calibrate your monitor if you’ve already done so using an 

ICC-compliant calibration tool such as Adobe Gamma and haven’t changed your video 
card or monitor settings.

If you have the Mac OS Gamma control panel (included with Adobe Photoshop 4.0 and 

earlier) or the Monitor Setup utility (included with PageMaker

®

 6.0) for Windows, 

remove it; it is obsolete. Use the latest Adobe Gamma utility instead.

Make sure your monitor has been turned on for at least a half hour. This gives it suffi-

cient time to warm up for a more accurate color reading.

Make sure your monitor is displaying thousands of colors or more.

Remove colorful background patterns on your monitor desktop. Busy or bright patterns 

surrounding a document interfere with accurate color perception. Set your desktop to 
display neutral grays only, using RGB values of 128. For more information, see the 
manual for your operating system.