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The characteristics and decodability of the Universal Product Code symbol

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2 Author(s)

Optical scanning components of supermarket systems require machine-readable code. The need for industry-wide cooperation and standardization of a code and symbol was shown. The sources of decoding error in printed optical codes were discussed and a class of codes, the (n, k ) codes, relatively resistant to error, were presented. The UPC code is a (7, 2) code. The UPC code and a method of decoding it were described. Decodability depends on several parameters; their quantitative relationships and effects upon decodability are found in another paper.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

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IBM Systems Journal  (Volume:14 ,  Issue: 1 )