the process of interpreting data in printed, handwritten, bar-code, or other visual form by a device (optical scanner or reader) that scans and identifies the data.
Compare optical character recognition.
Origin of optical scanning
First recorded in 1955–60
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A device that converts printed images and text into digital information that can be edited, transmitted, and stored. Optical scanners work by electronically measuring the intensity of color at a large number of individual locations across the page (often using phototransistors), and converting these measurements into digital numerical values usable by computers and other digital devices. See also A/D converter.
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