Raster scan

The rectangular pattern of image capture and reconstruction in television.

A raster scan, or raster scanning, is the rectangular pattern of image capture and reconstruction in television. By analogy, the term is used for raster graphics, the pattern of image storage and transmission used in most computer bitmap image systems. The word raster comes from the Latin word rastrum (a rake), which is derived from radere (to scrape); see also rastrum, an instrument for drawing musical staff lines. The pattern left by the lines of a rake, when drawn straight, resembles the parallel lines of a raster: this line-by-line scanning is what creates a raster. It is a systematic process of covering the area progressively, one line at a time. Although often a great deal faster, it is similar in the most-general sense to how one's gaze travels when one reads lines of text.

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Raster scan
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Adapted from content published on wikipedia.org
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  • Image By Sergei Frolov, Soviet Digital Electronics Museum, http://www.leningrad.su/museum/ - Own work, CC BY-SA 3.0 — from wikimedia.org
Last modified on May 26, 2020, 5:26 pm
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