Registers – Coded record sensors – Particular sensor structure
Patent
1990-03-19
1991-01-29
Pitts, Harold
Registers
Coded record sensors
Particular sensor structure
235472, 235494, G06K 710
Patent
active
049888528
ABSTRACT:
A system for finding and reading a bar code, arbitrarily located on a document, working from an electronic image of the document represented by a pixel array such as generated by a document scanner. A one-dimensional texture analysis is performed in the scanning direction by defining a pattern of test segments and searching for characteristic ranges of transistions within those test segments. If a horizontal test segment pattern fails to locate a bar code region, a test segment pattern skewed with respect to the horizontal is applied. If test patterns skewed with respect to the horizontal fail to locate a bar code region, then a state-transition analysis is applied in the direction perpendicular to the scan direction and in directions skewed with respect to that perpendicular to search for a terminal symbol characterizing the bar code.
REFERENCES:
patent: 4329574 (1982-05-01), Jordan, Jr.
patent: 4411016 (1983-10-01), Wakeland
patent: 4514622 (1985-04-01), Wevelsiep
patent: 4646353 (1987-02-01), Tange
patent: 4696049 (1987-09-01), Musso
patent: 4704519 (1987-11-01), Kulikauskas
Pitts Harold
Teknekron Transportation Systems, Inc.
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