Method of and apparatus for demodulating bar code

Details Method of and apparatus for demodulating bar code Method of and apparatus for demodulating bar code

1994-09-21

1996-03-26

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

G06K 710

Patent

active

055022960

ABSTRACT:
An apparatus for demodulating bar codes is disclosed. In this apparatus of this invention, a distortion quantity calculation unit for calculates a distortion quantity of a bar width of a character to be demodulated by use of bar code data generated by reading the bar codes in which characters are expressed by bar widths. A distortion quantity determining unit determines whether or not a bar width distortion quantity calculated by the distortion quantity calculation unit falls within a range of predetermined values. A first demodulation unit, when determining that the distortion quantity of the bar width falls within the range of the predetermined values, demodulates the character from the bar code data by effecting a first correcting process on the bar width distortion quantity. A second demodulation unit, when determining that the distortion quantity of the bar width does not fall within the range of the predetermined values, demodulates the character from the bar code data by effecting a second correcting process on the distortion quantity of the bar width.

REFERENCES:
patent: 4323772 (1982-04-01), Serge
patent: 5166500 (1992-11-01), Yoon et al.
patent: 5194720 (1993-03-01), Reinnagel et al.
patent: 5227616 (1993-07-01), Lee
patent: 5245167 (1993-09-01), Takenaka
patent: 5393968 (1995-02-01), Watanabe et al.

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