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G-4
Glossary
GDI (Graphics Device Interface)
Graphics and display technology used
by computers running Windows. GDI
applications rely on GDI (rather than
the PostScript language) to send text and
pictures to copier/printers.
GIF (Graphics Interchange Format)
A standard developed by CompuServe
for bitmap graphics of up to 256 colors
and used for posting photographic
images on the Internet or intranet pages;
rarely used for professional printing.
gradient
A smooth transition between two
different colors or between two shades
of a color.
Graphics Device Interface
See
GDI.
Graphics Interchange Format
See
GIF.
gravure
A printing technology that uses an
etched cylinder that has been immersed
in ink. The ink that remains in the
etched areas is applied to the paper. The
non-etched surfaces of the cylinder are
non-printing areas.
gray component replacement (GCR)
In shadow, midtone, and quarter-tone
areas where all three process colors (C,
M, Y) overprint, the gray components of
those colors are reduced and replaced by
black. This improves wet ink trapping
and reduces ink costs in process color
printing.
halftoning
A method for representing an original
continuous tone image using a pattern of
dots, lines or other patterns.
HSB
A color model where each color is
represented by its hue, saturation, and
brightness components; supported by
most color applications.
ICC profile
An industry standard color profile
format developed by the International
Color Consortium (ICC) that describes
the color capabilities, including the
gamut, of a color device based on the
differences between an ideal and the
current device. The ideal is often
provided by the manufacturer as a
color reference file. ICC profiles are
implemented on Mac OS computers in
ColorSync and on Windows computers
in Image Color Matching (ICM). The
Fiery color management system,
ColorWise, supports ICC profiles.