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256 Spire CX250 Color Server User Guide
Perceptual (Photographic)
(Default for RGB) A rendering intent method which preserves the
visual relationship among the colors as they are perceived by the
human eye. In other words, all colors are proportionally scaled to fit
the output gamut. All or most colors in the original are changed but
the relationship between them does not change.
This method is recommended when working with realistic images
such as photographs, including scans and images from stock
photography CDs.
PICT
A Macintosh file format for bitmaps and vector graphics.
Pixels
Contraction of Picture Element. The smallest element of a digital
image.
PostScript
A programming and page description language that has become
industry standard for electronic publishing. It is used to describe the
entire page, including both text graphics and images. PostScript is
completely independent of the printing device. Developed by Adobe
Systems, Inc.™
Prepress
Generic term used to describe the processes involved in preparing
images for printing. Includes the input, edit and output stages.
Printer description files
PPDs (PostScript Printer Definition), and PDFs (Printer Definition
Files). These files are used by the Macintosh applications to prepare
page and documents for specific output devices.
Process colors
The four ink colors used to reproduce full color images - cyan,
magenta, yellow and black.
PSImage
A low-resolution EPS file used in the Creo APR workflow. This file is
used for positioning in page layout. Changes made to this file will be
applied to the high-resolution file, which automatically replaces it
shortly before exposure. See also APR.
Quartertone
The tone area of an image influencing highlight detail and with
density values between the white point and midtone. Typically,
printed with a dot area near 25%. See also Highlights, Midtones,
Shadows.
Raster file
A file of data that was scanned, processed or output sequentially, bit
by bit and line by line. Also known as a bitmap.