Method and apparatus for decoding bar code images using information from previous scan lines

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United States of America Patent

PATENT NO 5438188
SERIAL NO

08221877

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Abstract

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A method and apparatus for decoding a pixel image representative of a bar code symbol. A bar code symbol is scanned along a first scan line to determine a first set of candidate character values, each candidate character value of this first set having an error value associated therewith. If the scanning along the first scan line results in an unsuccessful reading of the bar code symbol, then the bar code symbol is scanned along a second differing scan line to determine a second set of candidate character values, each candidate character value of this second set having an error value associated therewith. Corresponding error values associated with the first and second sets of candidate character values are next compared. For each corresponding pair of candidate character values from the first and second sets, the candidate character value having the smallest associated error value is selected. A third set of candidate character values is formed in accordance with the selected candidate character values, and the bar code symbol is decoded in accordance with the third set of candidate character values.

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Patent Owner(s)

Patent OwnerAddress
UNITED PARCEL SERVICE OF AMERICA INC55 GLENLAKE PARKWAY NE ATLANTA GA 30328

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Surka, Stefan Sandy Hook, CT 7 388

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