Method and apparatus for decoding bar code symbols using subpixe

Details Method and apparatus for decoding bar code symbols using subpixe Method and apparatus for decoding bar code symbols using subpixe

1994-03-22

1996-08-27

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235437, G06K 710

Patent

active

055503659

ABSTRACT:
A system for decoding a bar code symbol receives a signal representative of the symbol and searches the signal in one dimension to locate two adjacent critical points corresponding to an element of the symbol. The system also computes a value representative of the signal energy between the two critical points and determines the width of the element in accordance with the value.
A bar code symbol decoding system receives a signal representative of a bar code symbol having a plurality of characters, one of which is a checksum character. The system determines a first choice for each of the characters and a second choice for at least one of the characters from the signal. The system performs checksum analysis in accordance with the first choice for each of the characters. If that checksum analysis is not satisfied, then the system performs checksum analysis using the second choice.

REFERENCES:
patent: 4142243 (1979-02-01), Bishop et al.
patent: 4340963 (1982-07-01), Munday
patent: 4613759 (1986-09-01), Frohbach
patent: 4620444 (1986-11-01), Young
patent: 4794239 (1988-12-01), Allais
patent: 4822986 (1989-04-01), Guthmueller et al.
patent: 4873426 (1989-10-01), Sarna et al.
patent: 4916298 (1990-04-01), Raphael
patent: 4958064 (1990-09-01), Kirkpatrick
patent: 4963719 (1990-10-01), Brooks et al.
patent: 4973829 (1990-11-01), Ishida et al.
patent: 4988852 (1991-01-01), Krishnan
patent: 4992650 (1991-02-01), Somerville
patent: 5036182 (1991-07-01), Ouchi et al.
patent: 5045677 (1991-09-01), Okamura
patent: 5061843 (1991-10-01), Sato et al.
patent: 5073954 (1991-12-01), Van Tyne et al.
patent: 5081689 (1992-01-01), Meyer et al.
patent: 5086215 (1992-02-01), Carsner et al.
patent: 5120940 (1992-06-01), Willsie
patent: 5155343 (1992-10-01), Chandler et al.
patent: 5155344 (1992-10-01), Fardeau et al.
patent: 5247523 (1993-09-01), Arai et al.
patent: 5319181 (1994-06-01), Shellhammer et al.

Affiliated with

Also associated with

Rating

Method and apparatus for decoding bar code symbols using subpixe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for decoding bar code symbols using subpixe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for decoding bar code symbols using subpixe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1057647