Method and apparatus for recognizing and assembling optical code

Details Method and apparatus for recognizing and assembling optical code Method and apparatus for recognizing and assembling optical code

1992-12-22

1996-02-20

Hajec, Donald

Registers

Coded record sensors

Particular sensor structure

235463, G06K 710

Patent

active

054931088

ABSTRACT:
In an optical scanning system, a method and apparatus for decoding labels of single or multiple block formats by stitching together partial label segments obtained from multiple optical scans across the label is provided. Partial scans are decoded into strings of character information which are assembled by locating sub-strings of common elements between two strings. Strings in which the common elements occur at the ends are merged by deleting one set of redundant common characters and joining the remaining characters in proper sequence. The method assembles strings in which the common elements occur in the middle of one or both strings by testing for valid string combinations made by deleting characters adjacent to the common sub-string, on opposing ends of each string, and merging the resulting strings. Feature characters, parity information, checksum digits, and other label structural characteristics are used to verify resulting strings and completed blocks and labels. Processing continues until all string combinations are tested and/or a complete label is formed.

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