Bill discriminating apparatus

Details Bill discriminating apparatus Bill discriminating apparatus

1989-05-15

1990-08-07

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 50, 356 71, G06K 900

Patent

active

049474413

ABSTRACT:
A bill discriminating apparatus having two color detectors for photoelectrically detecting light components contained in light transmitted through or reflected by bills to be discriminated and having different wavelengths from each other, the bill discriminating apparatus including a current correction circuit for correcting current output from one of the two color detectors, two amplifiers for amplifying the current output from one of the two color detectors and current output from the other color detector, a gain adjusting circuit capable of adjusting gain of one of the two amplifiers, a differential amplifier for differentially amplifying signals output from the two amplifiers and a discriminator for discriminating denominations and/or genuineness of the bills based upon signals output from the differential amplifier. The thus constituted bill discriminating apparatus makes it possible to discriminate denominations and/or genuineness of the bills without fail.

REFERENCES:
patent: 4183665 (1980-01-01), Iannedrea et al.
patent: 4592090 (1986-05-01), Curl et al.
patent: 4618257 (1986-10-01), Bayne et al.
patent: 4749087 (1988-06-01), Buttifant
patent: 4881268 (1989-11-01), Uchida et al.

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