Method and apparatus for decoding unresolved bar code profiles u

Details Method and apparatus for decoding unresolved bar code profiles u Method and apparatus for decoding unresolved bar code profiles u

1995-06-22

1996-07-23

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235463, 235470, G06K 710

Patent

active

055391915

ABSTRACT:
A method and apparatus for decoding profiles which fail to resolve narrow elements in symbologies employing one element type having only a single width, first begins by producing a series of counts from the symbol using standard waveshaping and counting circuitry. Second, an X-dimension for the 1-wide elements is determined based on the first few counts corresponding to bars after the counts corresponding to the quiet zone. The Start and Stop characters are located and the method determines whether the symbol is in focus. If the symbol is out-of-focus, then groups of an odd number of 1-wide elements are converted to large counts that correspond to pseudo elements (e.g., wide bars in a symbology containing only 1-wide narrow bars). The method groups counts into individual characters, and divides all pseudo elements into individual 1-wide elements. The method thereafter decodes the symbol.

REFERENCES:
patent: 1985035 (1934-12-01), Kermode et al.
patent: 2612994 (1952-10-01), Woodland et al.
patent: 3359405 (1967-12-01), Sundblad
patent: 3622758 (1971-11-01), Schanne
patent: 3784792 (1974-01-01), Dobras
patent: 3909594 (1975-09-01), Allais et al.
patent: 4013893 (1977-03-01), Hertig
patent: 4056710 (1977-11-01), Shepardson et al.
patent: 4335301 (1982-06-01), Palmer et al.
patent: 4379224 (1983-04-01), Engstrom
patent: 4687942 (1987-08-01), Takagi et al.
patent: 4916298 (1990-04-01), Raphael
patent: 4980544 (1990-12-01), Winter
patent: 5080456 (1992-01-01), Katz et al.
patent: 5097263 (1992-03-01), Delpech et al.
patent: 5229591 (1993-07-01), Heiman et al.
patent: 5231293 (1993-07-01), Longacre, Jr.
patent: 5268562 (1993-12-01), Lazaridis
patent: 5276315 (1994-01-01), Surka
patent: 5376780 (1994-12-01), Klueter
patent: 5389770 (1995-02-01), Ackley
"Report on Unsymmetrical Signals in the Supermarket Scanner," interoffice memorandum, Intermec Corporation, Everett, WA, Jan. 21, 1970.
"Verification--New Insight for an Old Debate," Scan-Tech '87, interoffice memorandum, Intermec Corporation, Everett, WA, Oct. 13, 1987.
Barkan, Eric and David Sklar, "Effects of substrate scattering on bar-code scanning signals", SPIE 362:196-212, 1982.
Bar Code Print Quality--Guideline, American National Standards Institute, New York, NY, 1990, pp. 1-29.
Barkan, Eric and Jerome Swartz, "Depth of modulation and spot size selection in bar code laser scanners," in Proceedings of SPIE's 25th Annual International Technical Symposium and Exhibit, Int'l. Society for Optical Engineering, San Diego, CA, Aug. 24-28, 1981.
Ackley, Sprague, Verification--New Insight for an Old Debate, Scan-Tech '87, Intermec Corporation, Oct. 13, 1987.

Affiliated with

Also associated with

Rating

Method and apparatus for decoding unresolved bar code profiles u 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 unresolved bar code profiles u, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for decoding unresolved bar code profiles u will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-714635