Analysis method of multispectral image of note

A multi-spectral image and analysis method technology, applied in the field of new multi-function money detectors, can solve problems such as difficulty in improving counterfeit money, and achieve the effects of facilitating management and analysis and improving accuracy

Active Publication Date: 2011-10-19
尤新革
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It is cheap to implement and the technology is simple, but it is diffi

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  • Analysis method of multispectral image of note
  • Analysis method of multispectral image of note
  • Analysis method of multispectral image of note

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Embodiment

[0062] The following takes the fifth set of RMB 100 banknotes as an example to illustrate the specific identification process of banknotes. When the banknotes enter the banknote detector, the orientation of the banknotes is judged by using the magnetic signal and the infrared tube, and the image is obtained. Next, banknote vertex detection is performed by first detecting the four sides of the banknote, and then calculating the four intersection points to be the vertex positions of the banknote. First detect the upper edge, if the banknote image width is 1440 pixels, then the effective upper edge of the banknote can be from the 480th column to the 960th column. Then every 10 columns, scan from top to bottom to find the position of gradient mutation, and use this pixel as an edge point. Then calculate the slope of the front and rear edge points, and sort the slopes to pick out the edge points with the same slope. Finally, use these key edge points to carry out straight line fi...

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Abstract

The invention provides an analysis method of a multispectral image of a note, comprising the steps of: firstly, carrying out preprocessing on the acquired multispectral image of the note; then carrying out light-dark output compensation on effective areas by a fast block mapping method and obtaining clear local areas; and by a method for customizing local pairs, constructing a characteristic vector, calculating relevant coefficients of the characteristic vector and a standard reference vector, and carrying out false distinguishing according to the correlation between the vectors. In addition,a comprehensive crown-size recognition method is provided, so that the accuracy of the crown-size recognition is improved. In the method provided by the invention, the false-distinguishing speed and the crown-size recognition accuracy of the note can be obviously improved.

Description

technical field [0001] The invention relates to a novel multi-functional banknote detector based on multispectral images, which belongs to the field of banknote detectors. Background technique [0002] The cash circulation in China is very high. Different versions, different denominations, different old and new banknotes are mixed in the market, and the emergence of various counterfeit banknotes makes cash circulation more complicated and unsafe. The banknote detectors currently on the market cannot recognize these mixed RMB very well. Therefore, it is very important to research and develop a highly efficient and mature RMB authenticating and identifying new banknote detector, which is directly related to the security and order of finance. [0003] General banknote detectors use the magnetic characteristics, ultraviolet characteristics, and infrared transmission characteristics of RMB for counterfeiting. It is cheap to realize, and the technology is simple and convenient, ...

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Application Information

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IPC IPC(8): G07D7/12G07D7/121G07D7/202G07D7/206
Inventor 尤新革徐端全彭勤牧张朋蒋天瑜郑飞
Owner 尤新革
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