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Consumer Electronics by S. P. Bali

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BAR-CODE SCANNER AND DECODER

Optical reading is a system based on the principle that the optical shape of each character on the input media is capable of being identified by a reading device. A bar-code system is made up to two parts : the printer and the scanner/decoder. Printers are available to print labels or to print directly on products such as card board boxes and packages. The ink must contrast with the background so that the symbols can be easily read by the scanner. The second part of the system consists of a scanner that reads the code symbols and a decoder that interprets the code.

Optical scanners, also referred to as digital scanners or bar-code readers, are special optical devices which scan patterns of incident light and generate ...

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