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Title:
BANKNOTE GRAFFITI DETECTION METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/007164
Kind Code:
A1
Abstract:
Disclosed in the present invention is a banknote graffiti detection method. A watermark region of a banknote is used as the standard; gray-scale histograms of the watermark region on a reflection image and a transmission image are calculated respectively; then weighted summation is performed so as to obtain a weighted gray-scale histogram; mean value operation is performed according to the weighted gray-scale histogram so as to obtain a gray-scale background threshold; accumulative summation is performed on a gray-scale histogram of a non-watermark blank region in the reflection image and the gray-scale histogram of the watermark region so as to obtain a gray-scale histogram of the reflection image; proportion operation is performed on the basis of the gray-scale background threshold and the gray-scale histogram of the reflection image to obtain a graffiti index of the banknote to be detected. Thus, the problems of a complex and time-consuming algorithm in an existing banknote image graffiti detection method are resolved; the degree of graffiti of the banknote can be quantitatively described; the present invention is suitable for various different types of banknotes, and can achieve quick and effective effects.

Inventors:
LEI, Gang (No. 9 & 11 Kelin Road, Science City High-tech Industry Development Zon, Guangzhou Guangdong 3, 510663, CN)
WANG, Rongqiu (No. 9 & 11 Kelin Road, Science City High-tech Industry Development Zon, Guangzhou Guangdong 3, 510663, CN)
ZHAO, Zheng (No. 9 & 11 Kelin Road, Science City High-tech Industry Development Zon, Guangzhou Guangdong 3, 510663, CN)
CHEN, Chunguang (No. 9 & 11 Kelin Road, Science City High-tech Industry Development Zon, Guangzhou Guangdong 3, 510663, CN)
YU, Yuanchao (No. 9 & 11 Kelin Road, Science City High-tech Industry Development Zon, Guangzhou Guangdong 3, 510663, CN)
Application Number:
CN2018/088590
Publication Date:
January 10, 2019
Filing Date:
May 27, 2018
Export Citation:
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Assignee:
GRG BANKING EQUIPMENT CO., LTD. (No.9 & 11 Kelin Road, Science City High-tech Industry Development Zon, Guangzhou Guangdong 3, 510663, CN)
International Classes:
G07D7/187; G07D7/20
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (Room 1508, Huihua Commercial & Trade Building No. 80 Xian Lie Zhong Road, Yuexiu Distric, Guangzhou Guangdong 0, 510070, CN)
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