G-5
Glossary
imagesetter
Raster-based film output device; a high-
resolution laser output device that writes
bitmapped data onto photosensitive
paper or film.
JPEG
A graphics file format defined by the
Joint Photographic Experts Group
committee of International Standards
Organization (ISO); a standard for
digital compression of still image
graphic data.
metamerism
Phenomenon in which two colors
composed of different combinations of
light wavelengths appear identical under
a specific light source, but may look
different under other light sources. The
colors are called “metamers.”
moiré
An undesirable pattern in images made
using halftone screens. Moiré can be
caused by the improper line frequency
of the screens, improper screen angles,
improper alignment of halftone screens,
or by the combination of a halftone
screen with patterns in the image itself.
named color
A color that is defined according to a
custom color system. For example,
PANTONE 107 C is a named color.
office applications
Software applications commonly used
for business purposes, including
presentation applications, spreadsheets,
and word processing programs.
offset lithography
Printing in which ink is transferred from
printing plates to a rubber blanket and
then from the blanket to paper.
output
See
output profile.
output profile
The output profile describes the color
characteristics of a printing device. It
consists of both a profile for your copier/
printer and a calibration target that
defines the expected density response
of the copier/printer.
phosphor
Material used in making computer
monitors; phosphors glow and emit red,
green, and blue light when struck by an
electron beam, thus creating an image.
photographic rendering
A color rendering style that preserves
tonal relationships in images.
Unprintable colors are mapped to
printable colors in a way that retains
differences in lightness, sacrificing color
accuracy as necessary.
