
Page 52
Adobe® Acrobat® Reader 4.0
To install the Web browser plug-in (UNIX):
Run <installdir>/Browsers/netscape.
Calibrated color
The Portable Document Format allows for device-independent color (DIC)
specifications. DIC allows creators of PDF documents to specify the colors of
objects in page descriptions independent of the color characteristics of desti-
nation monitors or printers.
In a sense, each device speaks its own color language and it can’t communicate
that color very well to another device. What’s needed is an interpreter, such as a
color management system, that uses a device-independent color model as the
color language by which all color information is referenced. The color model
Acrobat Reader uses is called CIELAB, developed in 1976 by the Commission
Internationale de l'Eclairage (International Committee on Illumination, or CIE).
The CIE’s standard for measuring color is based on how the human eye
perceives it, not on the device that created it.