Method and apparatus for currency discrimination and counting

Details Method and apparatus for currency discrimination and counting Method and apparatus for currency discrimination and counting

G - Physics

06

K

G06K 9/00 (2006.01) G06M 3/00 (2006.01) G06M 3/10 (2006.01) G07D 7/00 (2006.01) G07D 7/04 (2006.01) G07D 7/12 (2006.01) G07D 7/16 (2006.01) G07D 7/20 (2006.01) G07D 11/00 (2006.01) G07F 19/00 (2006.01) G06F 15/30 (1990.01)

Patent

CA 2136194

An improved method and apparatus for discriminating between currency bills of different denomination uses an optical sensing and correlation technique based on the sensing of bill reflectance characteristic 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 is 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 discrimination between different currency denominations.

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