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Density
A precise measurement of the light energy
transmitted or reflected by a surface in the
presence of a standard light source.
Densitometer
An instrument that measures density according to
a specified standard. Status T densitometers are
commonly used in the graphic arts industry.
Four-color printer
A printing device that uses cyan, magenta, yellow,
and black ink or toner.
Gamut
A range of colors. A device gamut is the range of
colors that a device, such as a printer, can
produce. An image gamut is the range of colors in
a particular image.
Gamut mapping
The process whereby KX-P8420 color
management software compresses—"maps"—the
colors in a digital image to fit the color gamut of a
particular device.
Gradient fill
A color or grayscale fill made of smooth transitions
between two different colors or shades.
Graphics device interface (GDI)
Graphics and display technology used by
computers running Windows. GDI applications rely
on GDI rather than the PostScript language to
send words and pictures to printers.
Halftoning
A method for representing an original continuous
tone image using a pattern of dots of various sizes.
The pattern is determined by the line frequency,
screen angle, and dot shape.
Metamerism
Phenomenon where two colors composed of
different combinations of light wavelengths appear
identical. The colors are called "metamers".
Moiré
An undesirable pattern in images made using
halftone screens. Moiré can be caused by
improper screen angles, improper alignment of
halftone screens, or by certain types of 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.
Offset lithography
Printing in which ink is transferred from printing
plates to a rubber blanket and then from the
blanket to paper.
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, slightly sacrificing color
accuracy as necessary.
Pixel
The smallest distinct element of a raster image or
an image displayed on a monitor.
PostScript Level 2 or 3
Version of Adobe Systems' PostScript language,
which is used to print and display pictures and text.
PostScript Level 3 includes many enhancements
to older versions of PostScript, including improved
color matching and the ability to control printer-
specific features from applications.
Glossary
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