Method and apparatus for reading bar code magnetic ink character

Details Method and apparatus for reading bar code magnetic ink character Method and apparatus for reading bar code magnetic ink character

1988-06-20

1989-07-04

Pitts, Harold I.

Registers

Coded record sensors

Particular sensor structure

235463, G06K 708

Patent

active

048453480

ABSTRACT:
A method and system for use in reading magnetic characters comprised of bars and intervals dimensioned as short intervals or long intervals as is done in CMCs7 encoding. The interval between adjacent bars of a character is obtained by calculating the zero crossing point between a peak of a first polarity and a peak of a second polarity associated with a "bar" in the associated scanning signal. The zero crossing point may be compared to the midpoint of the associated "bar". The intervals are then determined by obtaining the distance or interval between the zero crossing points of adjacent "bars".

REFERENCES:
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patent: 3761685 (1973-09-01), Alpert et al.
patent: 3818446 (1974-06-01), Benson
patent: 3879707 (1975-04-01), Rohrer
patent: 4053737 (1977-10-01), Lafevers et al.
patent: 4379224 (1983-04-01), Angstrom
patent: 4533825 (1985-08-01), Yamada
patent: 4584703 (1986-04-01), Hallberg

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