Digitizing bar code symbol data

Details Digitizing bar code symbol data Digitizing bar code symbol data

2006-12-12

2006-12-12

Frech, Karl D. (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C235S462060, C235S462250

Reexamination Certificate

active

07147161

ABSTRACT:
Processing an analog electrical signal containing information representative of reflected light from indicia including regions of different light reflectivity, wherein the analog electrical signal contains edge transitions corresponding to boundaries between adjoining regions of different light reflectivity of the indicia. The edge transitions of at least a part of the analog electrical signal are analyzed to determine a level of blur in that part of the electrical signal. Based on the determined level of blur, one of a plurality of different techniques is selected for processing that part of the electrical signal to produce a digitized electrical signal in which transitions in the digital level of the signal correspond to boundaries between adjoining regions of different light reflectivity of the indicia.

REFERENCES:
patent: 4000397 (1976-12-01), Hebert et al.
patent: 5302813 (1994-04-01), Goren
patent: 5329105 (1994-07-01), Klancnik et al.
patent: 5352878 (1994-10-01), Smith et al.
patent: 5389770 (1995-02-01), Ackley
patent: 5449893 (1995-09-01), Bridgelall et al.
patent: 5478997 (1995-12-01), Bridgelall et al.
patent: 5486689 (1996-01-01), Ackley
patent: 5504318 (1996-04-01), Joseph et al.
patent: 5514858 (1996-05-01), Ackley
patent: 5539191 (1996-07-01), Ackley
patent: 5608201 (1997-03-01), Coleman, Jr.
patent: 5734152 (1998-03-01), Goren et al.
patent: 5902987 (1999-05-01), Coffman et al.
patent: 5923023 (1999-07-01), Arends et al.
patent: 5925868 (1999-07-01), Arends et al.
patent: 6328213 (2001-12-01), He et al.
patent: 0 821 317 (1998-01-01), None
den Dekker et al., “Resolution: a survey,” J. Opt. Soc. Am. A, 14(3),547, 1997.
Frieden, “Probability, Statistical Optics, and Data Testing,” Springer-Verlag, Berlin, 1983.
Goodman, “Introduction to Fourier optics,” McGraw-Hill, San Francisco, 1968.
Joseph et al., “Bar Code Waveform Recognition Using Peak Locations,” IEEE. Trans. Patt. Ana. & Mach. Intellig., 16(6), 630, Jun. 1994.
Joseph, “Recognition and restoration of blurred bilevel waveforms,” Ph.D. dissertation, CS Dept., SUNY Stony Brook, NY, 1992.
Palmer, “The Bar Code Book,” Helmers Publishing, Peterborough, NH, 1991.
Pratt, “Digital Image Processing,” John Wiley & Sons, New York, 1978.
Puetter, “Information, language, and pixon-based image reconstruction,” Proc. SPIE, 2827, 12, 1994.
Shellhammer et al., “Selective Sampling and Edge Enhancement in Bar Code Laser Scanning,” Proc. SPIE, 2660, 355, 1996.
Stern et al., “Analytical method to calculate optical transfer function for image motion and vibrations using moments,” J. Opt. Soc. Am. A., 14(2), 388, 1997.
Tsi et al., “System analysis of CCD-based code readers,” Appl. Opt., 32(19), 3504, Jul. 1993.
van der Gracht et al., “Broadband behavior of an optical-digital focus-invariant system,” Opt. Lett., 21(13), 919, 1996.

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