CN105118139B - One kind mirror paper money method - Google Patents
One kind mirror paper money method Download PDFInfo
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- CN105118139B CN105118139B CN201510488266.XA CN201510488266A CN105118139B CN 105118139 B CN105118139 B CN 105118139B CN 201510488266 A CN201510488266 A CN 201510488266A CN 105118139 B CN105118139 B CN 105118139B
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Abstract
The present invention provides a kind of mirror paper money method, and its step is as follows：Paper money sending device motion is controlled to be sent into a banknote first；By controlling light source timesharing to send more spectral coverage illumination；Image of the banknote under different spectral coverage is gathered by imaging device；The characteristics of image of the image obtained in extraction step 3 and be expressed as mathematical description Y=X (1) * W (1)+X (2) * W (2)+X (3) * W (3)+...+X (n) * W (n), wherein X represents false distinguishing feature, and W represents its weight；And by the Y value drawn compared with the decision threshold obtained according to banknote false distinguishing feature, continue repeat step 15 if Y is no more than threshold value, it is determined as that counterfeit money stops sending paper money if Y exceedes threshold value, the present invention is by using the double-face imaging that banknote is realized in same imaging device, and true and false discrimination is carried out to it, so that the volume of identifier or cash inspecting machine reduces, it is easier to carries.
Description
Technical field
The present invention relates to mirror paper money method.
Background technology
With expanding economy, money flow is more and more frequent, and thing followed false making molecule is also more and more rampant.False making
Molecule is really true to life with the counterfeit money made by high-tech technology, serious threat financial security, influences social stability.
Existing bank note has anti-counterfeiting design, wherein many anti-counterfeiting characteristics are embodied in the image of bank note, the difference of bank note
Spectrum picture (various visible rays, ultraviolet light, infrared light etc.) may include different anti-counterfeiting characteristics.In artificial false distinguishing, by human eye
The various spectrum pictures of bank note are observed, false distinguishing is carried out according to anti-counterfeiting characteristic.As computer technology, image processing techniques, pattern are known
The development of other technology, the image false distinguishing automated by computer turn into the development trend of paper money discrimination.
It is existing that currency examination is carried out using optical characteristics, it is most of using bireflectance light source, dual image collection, its hardware configuration compared with
For complexity, therefore need a kind of banknote detection method that can be realized accurate currency examination and paper-money discriminator carrying problem can be reduced
The content of the invention
It is an object of the invention to provide one kind mirror paper money method, realize positive and negative using single CIS while identify and carry out essence
Quasi- currency examination.
The present invention provides：One kind mirror paper money method, its step are as follows：
1) paper money sending device motion is controlled to be sent into a banknote first；
2) by controlling light source timesharing to send more spectral coverage illumination；
3) image of the banknote under different spectral coverage is gathered by imaging device, one B faces image for including banknote of acquisition
The reflected image P1 of an information and transmission image P2 comprising banknote A faces and B faces imaging importing, and by any one
Open image and carry out mirror to processing, and obtain an A faces image P3 for including banknote A faces image information, P3=P2-P1；
4) the reflected image P1 and A faces image P3 obtained in extraction step 3 characteristics of image is simultaneously expressed as mathematical description Y
=X (1) * W (1)+X (2) * W (2)+X (3) * W (3)+...+X (n) * W (n), wherein X represent false distinguishing feature, and W represents its weight, n
Represent the number of false distinguishing feature；
5) and by the Y value drawn compared with the decision threshold obtained according to banknote false distinguishing feature, if Y be no more than threshold value if after
Continuous repeat step 1-5, it is determined as that counterfeit money stops sending paper money if Y exceedes threshold value, the false distinguishing feature in the step 4 includes light and becomes oil
Ink, watermark, infrared head portrait and fluorescence silk, the false distinguishing of the fluorescence silk are characterized as
, wherein σ is the scale parameter of normal distribution, and μ is the location parameter of normal distribution.
The present invention by using the double-face imaging that banknote is realized in same imaging device, its double-face imaging used
Mode, false distinguishing feature can be showed in same image, improve the accuracy that the true and false distinguishes, while reduce imaging device
Usage amount so that the volume of identifier or cash inspecting machine reduces, it is easier to carries.
Brief description of the drawings
Fig. 1 is the workflow diagram of the present invention.
Fig. 2 is the rough schematic of identifier.
Embodiment
Embodiments of the present invention is further illustrated below in conjunction with the accompanying drawings：
As shown in figure 1, the present invention provides a kind of mirror paper money method, its step is as follows：
Paper money sending device motion is controlled to be sent into a banknote first；
By controlling light source timesharing to send more spectral coverage illumination；
Image of the banknote under different spectral coverage is gathered by imaging device, obtaining one includes the letter of B faces image of banknote
The reflected image P1 of a breath and transmission image P2 comprising banknote A faces and B faces imaging importing, and by any one
Image carries out mirror to processing, and obtains an A faces image P3 for including banknote A faces image information, P3=P2-P1；
By the brightness for the reflection source for controlling the transmitted light source being disposed over and lower section, in same imaging device
The reflected image P1 with the B faces image information and transmission image P2 with the overlapping A faces of banknote and B faces information is obtained,
Due to the image obtained in same imaging device, therefore reflected image P1 and transmission image P2 is mirror image, respectively to two
Individual image is handled, and mirror image processing is carried out to any one image, and by the method for image procossing by transmission plot
As the B faces image information removal in P2, i.e. P2-P1 obtains an A faces image P3 only with A faces image information, then directly to two
Open image and carry out false distinguishing feature extraction, due to can directly realize the IMAQ in positive and negative two faces in single imaging device,
The use of imaging device can be effectively reduced, and directly obtains false distinguishing image by the way of IMAQ, its discrimination
Height, accuracy rate are high.
And using this method without banknote positive and negative is identified, it is by directly reflecting and transmiting the figure formed
Picture, the false distinguishing feature on differentiation banknote is directly carried out, the counterfeit moneys such as coin are pieced together in effective identification.
The reflected image P1 and A faces image P3 obtained in extraction step 3 characteristics of image is simultaneously expressed as mathematical description Y=
X (1) * W (1)+X (2) * W (2)+X (3) * W (3)+...+X (n) * W (n), wherein X represent false distinguishing feature, and W represents its weight.It is logical
Cross using multiple false distinguishing feature while detect, improve it and differentiate precision, while the fluorescence silk for being most difficult to hold at present differentiates, and
Following identification methods is proposed, to realize the accurate discriminating of fluorescence silk.
And by the Y value drawn compared with the decision threshold obtained according to banknote false distinguishing feature, continue if Y is no more than threshold value
Repeat step 1-5, it is determined as that counterfeit money stops sending paper money if Y exceedes threshold value.
Decision threshold is obtained by the banknote mathematical modeling established according to genuine notes ticket false distinguishing feature, and according to imaging system
Feature, determines the parameterized template and decision threshold of mathematical modeling, and stores it in system storage.By with setting before
Decision threshold compare, to realize the discriminating of true and false paper money.
False distinguishing feature in the step 4 includes photochromatic printing ink, watermark, infrared head portrait and fluorescence silk.
Due to fluorescence silk random distribution in banknote, and quantity, position are random, directly can not be come with quantity true
Determine threshold value, or specified location is whether there is to judge that the false distinguishing information whether there is, for this problem, using Mathematical Modeling Methods
It is as follows, fluorescence silk quantity Normal Distribution is known according to analysis, by a large amount of analyses to RMB, normal state point can be obtained
The location parameter μ and scale parameter σ of cloth.
So the false distinguishing feature of fluorescence silk can be described as：
Wherein σ is the scale parameter of normal distribution, and μ is the location parameter of normal distribution.
As shown in Fig. 2 the invention also discloses a kind of identifier using above-mentioned mirror paper money method, the identifier include into
Arithmetic unit and transmitting device as device, for judging authenticity of banknotes, the transmitting device has to be passed through for flaky medium
Transmission channel, transmitted light source is set above the transmission channel, the lower section of the transmission channel set reflection source and into
As device, the imaging device receives illumination and the imaging of transmitted light source and reflection source.
The seat of honour 5 and lower seat 6 are provided with the identifier, is transmission channel 4 between the seat of honour and lower seat, then transmitted light
Source 1 is arranged on the seat of honour 5, and the reflection source 2 is arranged on lower seat 6, and then imaging device 3 is arranged on lower seat, works as banknote
When being sent into transmission channel by transmitting device, it is controlled saturating between transmitted light source and reflection source by arithmetic unit
Light source and reflection source different spectral illuminations at times are penetrated, transmission image P2 and reflected image are respectively obtained on imaging device
P1。
The imaging device is CIS.
The side any up and down of the transmission channel is provided with magnetic head.；Magnetic head then can detect on bank note whether contain Magnetic Materials
Matter, as crown word number in RMB and metallic security line all have magnetic.
The arithmetic unit also includes controller, and the controller controls the bright of transmitted light source and reflection source respectively
Degree.The arithmetic unit is additionally provided with memory.Memory is used for the false distinguishing feature and decision threshold for storing genuine notes, for carrying out
Genuine/counterfeit discriminating.
Embodiment is not construed as limitation of the present invention, but any spiritual improvements introduced based on the present invention, all should be
Within protection scope of the present invention.
Claims (1)
1. one kind mirror paper money method, it is characterised in that：Its step is as follows：
1) paper money sending device motion is controlled to be sent into a banknote first；
2) by controlling light source timesharing to send more spectral coverage illumination；
3) image of the banknote under different spectral coverage is gathered by imaging device, obtaining one includes the information of B faces image of banknote
Reflected image P1 and a transmission image P2 comprising banknote A faces and B faces imaging importing, and by scheming to any one
As carrying out mirror to processing, and obtain an A faces image P3 for including banknote A faces image information, P3=P2-P1；
4) the reflected image P1 and A faces image P3 obtained in extraction step 3 characteristics of image is simultaneously expressed as mathematical description Y=X
(1) * W (1)+X (2) * W (2)+X (3) * W (3)+...+X (n) * W (n), wherein X represent false distinguishing feature, and W represents its weight, n generations
The number of table false distinguishing feature；
5) and by the Y value drawn compared with the decision threshold obtained according to banknote false distinguishing feature, weight is continued if Y is no more than threshold value
Multiple step 1-5, be determined as that counterfeit money stops sending paper money if Y exceedes threshold value, the false distinguishing feature in the step 4 include photochromatic printing ink,
Watermark, infrared head portrait and fluorescence silk, the false distinguishing of the fluorescence silk are characterized asWherein σ is
The scale parameter of normal distribution, μ are the location parameter of normal distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510488266.XA CN105118139B (en) | 2015-08-11 | 2015-08-11 | One kind mirror paper money method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510488266.XA CN105118139B (en) | 2015-08-11 | 2015-08-11 | One kind mirror paper money method |
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| Publication Number | Publication Date |
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| CN105118139A CN105118139A (en) | 2015-12-02 |
| CN105118139B true CN105118139B (en) | 2018-03-06 |
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| CN201510488266.XA Active CN105118139B (en) | 2015-08-11 | 2015-08-11 | One kind mirror paper money method |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5923413A (en) * | 1996-11-15 | 1999-07-13 | Interbold | Universal bank note denominator and validator |
| CN101763681B (en) * | 2008-12-23 | 2011-12-14 | 北京新岸线数字图像技术有限公司 | Banknote discriminating device and method |
| CN102096962A (en) * | 2010-12-23 | 2011-06-15 | 北京新岸线软件科技有限公司 | Paper currency detecting method and device |
| CN102890840B (en) * | 2012-08-22 | 2016-03-23 | 山东新北洋信息技术股份有限公司 | Banknote discriminating method and device |
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