Retrace data elimination

Details Retrace data elimination Retrace data elimination

G - Physics

06

K

354/66

G06K 9/00 (2006.01)

Patent

CA 1070021

RETRACE DATA ELIMINATION Abstract of the Disclosure This invention relates to modification and utilization of signals developed by automatic reading systems where a hand-held optical unit scans a data field or alpha-numeric characters, and more particularly, to operations which eliminate redundancy in signals produced by scanning a given data field either direction. A higher first line accept rate is achieved. In automation of the input of data such as in point of sale transactions, invoicing and the like, scanning systems of various types are employed. In point of sale systems, for example, price and inventory information automatically is listed from specified data fields on articles of merchandise. Bar codes of various types are used where optical scanning systems respond to movement of a bar coded field past the reading station. In U.S. Patent No. 4,075,605 which issued to Larry L. Hilley et al on 21 February 1978 entitled Character Recognition Unit, an optical reading system is disclosed wherein a hand-held wand containing optical sensors is drawn across a data field. Alpha-numeric data thus read is then utilized for providing to a customer, for example, a tabulation of a plurality of sales as well as providing to store management a detailed record of transactions for inventory control and other management purposes.

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