IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0733117
(2000-12-08)
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발명자
/ 주소 |
- Raterman, Donald R.
- Graves, Bradford T.
- Stromme, Lars R.
- Bauch, Aaron M.
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
132 인용 특허 :
108 |
초록
▼
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 detect
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.
대표청구항
▼
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 detect
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. 100, Rhoads, 382/232; US-5875249, 19990200, Mintzer et al., 380/054; US-5893101, 19990400, Balogh et al., 707/100; US-5898779, 19990400, Squilla et al., 713/176; US-5905800, 19990500, Moskowitz et al.; US-5930369, 19990700, Cox et al., 380/054; US-5933798, 19990800, Linnartz, 702/191; US-5949055, 19990900, Fleet et al., 235/469; US-5974548, 19991000, Adams, 713/200; US-5991426, 19991100, Cox et al., 382/100; US-6064764, 20000500, Bhaskaran et al., 382/183; US-6122403, 20000900, Rhoads, 382/233; US-6185683, 20010200, Ginter et al.; US-6233347, 20010500, Chen et al.; US-6233684, 20010500, Stefik et al., 713/176; US-6246777, 20010600, Agarwal et al., 382/100; US-6226387, 20010700, Twefik et al.; US-6272176, 20010800, Srinivasan; US-6272634, 20010800, Tewfik et al.; US-6275599, 20010800, Adler et al., 382/100; US-6285775, 20010900, Wu et al., 382/100; US-6285776, 20010900, Rhoads; US-6314192, 20011100, Chen et al.; US-6332031, 20011200, Rhoads et al.; US-6332194, 20011200, Bloom et al., 709/223; US-6334187, 20011200, Kadono, 713/176; US-20010020270, 20010900, Yeung et al., 382/100; US-20010021144, 20010900, Oshima et al.; US-20010052076, 20011200, Kadono; US-20020009208, 20020100, Alattar et al.; US-20020010684, 20020100, Moskowitz, 382/100; US-20020015509, 20020200, Nakamura et al.
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