Image analysis – Applications – Reading paper currency
Patent
1993-09-27
1995-11-14
Boudreau, Leo H.
Image analysis
Applications
Reading paper currency
382319, 382323, G06K 900
Patent
active
054674050
ABSTRACT:
An improved method and apparatus for discriminating between currency bills of different denominations uses an optical sensing and correlation technique based on the sensing of bill reflectance characteristics obtained by illuminating and scanning a bill along its narrow dimension. A series of detected reflectance signals are obtained by sampling and digitally processing, under microprocessor control, the reflected light at a plurality of predefined sample points as a currency bill is moved across an illuminated strip with its narrow dimension parallel to the direction of transport of the bill. The sample data is subjected to digital processing, including a normalizing process, whereby the reflectance data represents a characteristic pattern that is unique for a given bill denomination and incorporates sufficient distinguishing features between characteristic patterns for discriminating between different currency denominations. A plurality of master characteristic patterns are generated and stored using original bills for each denomination of currency to be detected. The pattern generated by scanning a bill under test and processing the data samples is compared with each of the prestored master patterns to generate, for each comparison, a correlation number representing the extent of similarity between corresponding ones of the plurality of data samples for the compared patterns. Denomination identification is based on designating the scanned bill as belonging to the denomination corresponding to the stored master pattern for which the correlation number resulting from pattern comparison is determined to be the highest, subject to a bi-level threshold of correlation.
REFERENCES:
patent: 3246295 (1966-04-01), Claris et al.
patent: 4179685 (1979-12-01), O'Maley
Bauch Aaron M.
Graves Bradford T.
Raterman Donald E.
Stromme Lars R.
Boudreau Leo H.
Cummins-Allison Corporation
Tran Phuoc
LandOfFree
Method and apparatus for currency discrimination and counting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for currency discrimination and counting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for currency discrimination and counting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1226751