bitmap

bitmap

[bit-map]
noun
a piece of text, a drawing, etc., represented, as on a computer display, by the activation of certain dots in a rectangular matrix of dots.
Also, bit map.

bitmapped, adjective
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Collins
World English Dictionary
bitmap (ˈbɪtˌmæp)
 
n
1.  a picture created on a visual display unit where each pixel corresponds to one or more bits in memory, the number of bits per pixel determining the number of available colours
 
vb , -maps, -mapping, -mapped
2.  (tr) to create a bitmap of

Collins English Dictionary - Complete & Unabridged 10th Edition
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Dictionary.com's 21st Century Lexicon
Main Entry:  bitmap
Part of Speech:  n
Definition:  See raster image
Dictionary.com's 21st Century Lexicon
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Etymonline
Word Origin & History

bitmap
1973, in computer jargon, from bit (2) + map. Literally, a map of bits
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
bitmap   (bĭt'māp')  Pronunciation Key 
Computer Science
A set of bits that represents a graphic image. Each bit or group of bits corresponds to a pixel in the image. Optical scanners and fax machines convert text or pictures into bitmaps.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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FOLDOC
Computing Dictionary

bitmap definition

graphics, file format
A data file or structure which corresponds bit for bit with an image displayed on a screen, probably in the same format as it would be stored in the display's video memory or maybe as a device independent bitmap. A bitmap is characterised by the width and height of the image in pixels and the number of bits per pixel which determines the number of shades of grey or colours it can represent. A bitmap representing a coloured image (a "pixmap") will usually have pixels with between one and eight bits for each of the red, green, and blue components, though other colour encodings are also used. The green component sometimes has more bits that the other two to cater for the human eye's greater discrimination in this component.
See also vector graphics, image formats.
(1996-09-21)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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