image
1. <data, graphics> Data representing a two-dimensional scene. A digital
image is composed of pixels arranged in a rectangular array with a certain
height and width. Each pixel may consist of one or more bits of information,
representing the brightness of the image at that point and possibly including
colour information encoded as RGB triples.
Images are usually taken from the real world via a digital camera, frame
grabber, or scanner; or they may be generated by computer, e.g. by ray tracing
software.
See also image formats, image processing.
(1994-10-21)
2. <mathematics> The image (or range) of a function is the set of values
obtained by applying the function to all elements of its domain. So, if f : D ->
C then the set f(D) = { f(d) | d in D } is the image of D under f. The image is
a subset of C, the codomain.
(2000-01-19)
Nearby terms:
Illiac IV « ILOC « Ilog Solver « image »
image formats » image map » image processing
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