Any device that systematically breaks up an image into picture elements (or pixels) and records some attribute of each picture element. The sweep of a scanner's mirror, prism, antenna, or other element across the track (direction of flight) may be straight, circular, or another shape.

Related Terms
line scanner,   Multispectral Scanner MSS,  

External links for scanner
scanner on Wikipedia
scanner on Google
scanner on Yahoo!
scanner on Answers
scanner on The Free Dictionary

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