Magnetic character reader with double document detection

Details Magnetic character reader with double document detection Magnetic character reader with double document detection

1981-12-29

1985-04-09

Masinick, Michael A.

Image analysis

Histogram processing

For setting a threshold

209567, G06K 900, G06K 13067, B07C 5344

Patent

active

045106150

ABSTRACT:
A multi-gap magnetic character reader is provided with the ability to automatically detect double documents. Where only weak signals are sensed, all signals are combined and compared to a reference. Where the weak signals are due to a piggyback document, the combined signals will be large with respect to the reference. Multiple documents thus detected are directed to a special reject bin.

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patent: 4237378 (1980-10-01), Jones
patent: 4243983 (1981-01-01), Vyas
patent: 4245211 (1981-01-01), Kao
patent: 4299325 (1981-11-01), Quinton et al.
patent: 4358016 (1982-11-01), Richardson et al.
patent: 4397460 (1983-08-01), Milanes et al.

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