Bar code demodulating method empolying reference black and white

Details Bar code demodulating method empolying reference black and white Bar code demodulating method empolying reference black and white

1995-06-07

1996-06-11

Shepperd, John

Registers

Coded record sensors

Error checking

235463, G06K 710

Patent

active

055257844

ABSTRACT:
A bar code demodulating method, in a first step, determines a number of modules, corresponding to the black bars present within a demodulating character of a bar code to be demodulated, with reference to reference black bars in a previously demodulated character and, in a second step, determines a number of modules corresponding to all white bars present within the demodulating character, based on a corresponding reference white bar in the previously demodulated character and, then, demodulates the demodulating character based on the respective numbers of modules determined in the first and second steps.

REFERENCES:
patent: 4354101 (1982-10-01), Hester et al.
patent: 4414468 (1983-11-01), Laurer et al.
patent: 4438327 (1984-03-01), Smith
patent: 4488678 (1984-12-01), Hara et al.
patent: 4528443 (1985-07-01), Smith
patent: 4757206 (1988-07-01), Ohta
patent: 4973830 (1990-11-01), Ouchi et al.

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