Intercharacter gap detector for MICRS

Details Intercharacter gap detector for MICRS Intercharacter gap detector for MICRS

1980-10-06

1983-04-26

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

235449, G06K 920

Patent

active

043814948

ABSTRACT:
System for determining whether magnetic ink is present on specific areas of a document bearing magnetic ink characters. Signals are produced as a magnetic read head passes over the area in question on the face of the document. These signals are routed to apparatus which operates in response to the signals by providing outputs of a first kind when magnetic ink is present and outputs of another kind when ink is not present or is not present in sufficient amount to produce a signal exceeding a threshold value. Logic means responsive to the signals of the first and second kinds establish the presence or absence of magnetic material.

REFERENCES:
patent: 3167742 (1965-01-01), Miller
patent: 3278900 (1966-10-01), Wood
patent: 3302174 (1967-01-01), Djinis et al.
patent: 3629826 (1971-12-01), Cutaia et al.
patent: 3638238 (1972-01-01), Milford et al.
patent: 3662341 (1972-05-01), Baumgartner et al.

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