Scanners That Can Read
Scanning artwork and photographs for reproduction is only one reason to use a digital scanner. Another important use is to enable computers to read printed documents. This process is called optical character recognition.
In optical character recognition, a black-and-white digital scan is first made of a document. Using various software programs, a computer is able to recognize this image as various letters and words. The text can then be edited in a word-processing program, just like text typed in by a person at a keyboard.
Because converting paper documents to digital format is very important to many businesses; some scanners have been made for this specific purpose. The primary technology is the same as for desktop scanners, but these special scanners use a mechanism that feeds pieces of paper one-by-one onto the scanning plate.
Chambers, Mark L. Scanners for Dummies. Hungrey Minds Inc., 2001.
Lew, Michael S. Principles of Visual Information Retrieval (Advances in Pattern Recognition). Berlin: Springer Verlag, 2001.
PC Tech Guide. "Input-Output Scanners." December 1, 2001 [cited January 17, 2003]. <http://www.pctechguide.com/18scanners.htm>.
Scott M. Lewis
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