Gamma Correction
The correction of tonal ranges in an image, normally by the adjustment
of tone curves. Gamut
The limited range of colors provided by a specific input device, output
device or pigment set.
Gang Scanning
Sequential scanning of multiple originals using the same previously
defined exposure setting for each.
Gateway
A special-purpose dedicated computer that attaches to two or more disparate
networks and converts data packets from one form to another.
GB
Gigabyte. A unit of data storage size which represents 10^9 (one billion)
characters of information.
Gb
Gigabit. 10^9 bits of information (usually used to express a data transfer
rate; as in, 1 Gigabit/second = 1Gbps).
GCG (Grey Component Replacement)
A technique for replacing all the neutral tones of an image with an
appropriate amount of black.
GIF
Graphic Interchange Format (pronounced jiff). A file compression format
developed by CompuServe for transferring graphic files to and from on-line
services.
Gigabyte
1,024 megabytes, or 1,048,576 kilobytes of digital data.
gopher
A consistent user interface and gateway into many on-line white pages
and other address databases.
Graphical User Interface (GUI)
The graphical visual representation of the working environment that
presents the elements of your computer as objects on a desktop.
Grey Balance
The balance between CMY colorants required to produce neutral greys
without a color cast.
Grey Levels
Discrete tonal steps in a continuous tone image, inherent to digital
data. Most CT images will contain 256 grey levels per color.
Greyscale
A continuous tone image comprising black, white, and grey data only.
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