CN102737435A - Paper money discrimination method and device - Google Patents
Paper money discrimination method and device Download PDFInfo
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- CN102737435A CN102737435A CN201110088920XA CN201110088920A CN102737435A CN 102737435 A CN102737435 A CN 102737435A CN 201110088920X A CN201110088920X A CN 201110088920XA CN 201110088920 A CN201110088920 A CN 201110088920A CN 102737435 A CN102737435 A CN 102737435A
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/004—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip
- G07D7/0043—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip using barcodes
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Abstract
The invention discloses a paper money discrimination method and a device. The method comprises the following steps: acquiring a transmission image of a region with window-open type safety line indentation characteristics on paper money, wherein the region is transmitted by light beam; and analyzing and recognizing the indentation characteristics in the image so as to determine the authenticity of the paper money. The method and the device of the invention have advantages of good adaptability to various currencies, low hardware cost, a high detection and recognition rate, stable and reliable performance, etc.
Description
Technical field
The invention belongs to field of photoelectric technology, relate in particular to a kind of bank note false distinguishing method and apparatus.
Background technology
The key problem in financial machine and tool field is exactly the false distinguishing of bank note.Safety line (security thread) put into continuously when being paper making paper, parallel with paper, have anti-fraud functional wire or a banded additive.The earliest safety line is after becoming line by natural fiber crops or silk spinning in the world, and it is inner when manufacturing paper with pulp paper, to add paper continuously.At present safety line is a base material with PET (polyester) often, loads multiple visible, that light is variable and machine readable anti-counterfeiting characteristic above that.Present bank note safety line general thick 20-40 μ m, wide 1-4mm, the length then width with individual bank note after cutting is the same.Safety line generally is divided into fully buried safety line and fenestration safety line by imbedding in the paper by the degree of fiber-covered.Full paper fiber is all covered fully buried safety line in the safety line two sides.See under the reflected light that safety line is generally not obvious, printing opacity is seen then visible safety line shadow and hollow out literal on it or the dark literal on the light line etc. continuously.Another kind of safety line be one side fully by the paper fiber-covered, another side is covered with fiber discontinuously, the zone that does not cover fiber is just as the wicket of opening one by one, outside being exposed to, therefore is the fenestration safety line one section one section of safety line.Fenestration safety line dispensing difficulty is bigger than fully buried safety line; The visual information that window-open type broad safety line can load is horn of plenty more, and the dispensing difficulty is bigger, and it is also just more difficult to forge.So the fenestration safety line is to develop one type faster in the present bill anti-counterfeiting technology.
But prior art all is the detection to the anti-counterfeiting characteristic of safety line own for the detection of safety line; Because fenestration safety line dispensing technology, can see significantly light and dark strip indentation pattern in the safety line both sides during in transmission, and counterfeit money can't not copied owing to there being corresponding process equipment to this characteristic.Like this, just produce the extremely strong characteristic of a kind of anti-counterfeit capability: fenestration safety line indentation feature.
Summary of the invention
In view of this, to bank note fenestration safety line indentation feature, the present invention provides a kind of bank note false distinguishing method and apparatus.For there is a basic understanding some aspects to the embodiment that discloses, provided simple summary below.This summary part is not to comment general, neither confirm the key/critical component or describe the protection domain of these embodiment.Its sole purpose is to present some notions with simple form, with this preamble as the detailed description of back.
For reaching the object of the invention, on the one hand, the present invention provides a kind of bank note false distinguishing method, comprising:
Obtain bank note uplifting window formula safety line indentation feature region by the transmission image of light beam transmission;
Analyze the indentation feature in the said image of identification, thereby judge forge or true or paper money.
In some optional embodiment, described light beam is infrared light, ultraviolet light or white light.
In some optional embodiment, the indentation feature in the described analysis recognition image comprises: the image to the indentation feature region carries out pre-service, and pretreated image is analyzed.
In some optional embodiment, said image to the indentation feature region carries out pre-service and comprises:
Binary conversion treatment is carried out to indentation feature region image in safety line position in the positioning image;
To carrying out denoising through the image after the binary conversion treatment.
In some optional embodiment, said pretreated image analysis is comprised: respectively to analyzing through the gray-scale value perspective view through the indentation feature of safety line both sides in the pretreated image.
In some optional embodiment, the x axial coordinate of described gray-scale value perspective view is the pixel number of width of paper money; The y axial coordinate is a gray scale numerical value.
In some optional embodiment, the said analysis through the gray-scale value perspective view comprises:
Through detecting rising edge and the negative edge in the said gray-scale value perspective view, calculate the x axial coordinate difference of corresponding rising edge and negative edge, draw the crest width;
When said crest width satisfies setting range, be the indentation feature of genuine note.
In some optional embodiment, said crest width is the width of bright line.
Another aspect of the present invention provides a kind of bank note false-identifying device, comprising:
Light source and imageing sensor are placed in money transmitting channel both sides up and down respectively;
Imageing sensor obtains bank note uplifting window formula safety line indentation feature region by the transmission image of light beam transmission;
The indentation feature in the said image is discerned in total control circuit analysis, thereby judges forge or true or paper money.
In some optional embodiment, described light source is infrared light supply, ultraviolet source or ordinary light source.
In some optional embodiment, described imageing sensor is contact-type image sensor CIS.
In some optional embodiment, described total control circuit comprises:
Pre-processing module is carried out pre-service to the image of indentation feature region;
Identification module is analyzed pretreated image.
In some optional embodiment, described pre-processing module is used for:
Binary conversion treatment is carried out to indentation feature region image in safety line position in the positioning image;
To carrying out denoising through the image after the binary conversion treatment.
In some optional embodiment, said identification module is respectively to analyzing through the gray-scale value perspective view through the indentation feature of safety line both sides in the pretreated image.
In some optional embodiment, the x axial coordinate of described gray-scale value perspective view is the pixel number of width of paper money; The y axial coordinate is a gray scale numerical value.
In some optional embodiment, described identification module is used for:
Through detecting rising edge and the negative edge in the said gray-scale value perspective view, calculate the x axial coordinate difference of corresponding rising edge and negative edge, draw the crest width;
When said crest width satisfies setting range, be the indentation feature of genuine note.
In some optional embodiment, said crest width is the width of bright line.
For above-mentioned and relevant purpose, one or more embodiment comprise the characteristic that the back will specify and in claim, particularly point out.Below explanation and accompanying drawing specify some illustrative aspects, and its indication only is some modes in the utilizable variety of way of principle of each embodiment.Other benefit and novel features will consider and become obviously along with following detailed description combine accompanying drawing, and the disclosed embodiments are to comprise being equal to of all these aspects and they.
Because the indentation feature of fenestration safety line forms when manufacturing paper with pulp bank note and is caused by technology; Do not belong to general false proof point in principle; The light and shade striped is that this characteristic has extremely hidden security feature because the paper fibre density when making the fenestration safety line variation has taken place.And the counterfeit money of circulation is all in the safety line anti-system of windowing, and safety line magnetic is imitated high emulation coin.Just can't prevent making this indentation feature owing to the manufacture craft of the fenestration safety line that lacks genuine note.Because this characteristic is light and dark fringe spacing under the light beam transmission, and counterfeit money does not all have this type of pattern, so the false distinguishing method is simple, stability is high.The present invention has proposed the indentation feature false distinguishing method and apparatus based on the fenestration safety line of light beam transmission through the principle of analysis realistic problem and the starting point of fraud.With traditional comparing based on the catoptric imaging authenticating currency true and false, the present invention has and is difficult for cracking, advantage such as kind of currencies adaptability is strong, and hardware cost is low.
Detection method provided by the invention and device receive bank note in machinery is walked the paper money chamber, to walk the paper money situation to be influenced lessly, and the effect of obtaining indentation feature also can guarantee.Secondly, for different Currency Types,, also can accomplish the detection of different Currency Type bank note through a set of equipment even the safety line indentation feature has nothing in common with each other in the position of bank note.When distribution new edition bank note, only need just can accomplish device upgrade through software upgrading.Can be when carrying out the mechanical part design so that structure is more compact, device assembles is also convenient.Effectively save hardware cost.Traditional reflective image capture device is owing to need to carry out image recognition in direction up and down, therefore needs up and down two cover collecting devices could accomplish whole collecting works at least.False-identifying device provided by the invention is walked the paper money mode for positive and negative two kinds, distinguishes out the problem that above-below direction can be handled the different images that the diverse location up and down of bank note brings through algorithm.Therefore only need a light source and imaging device can accomplish the images acquired process.Detection method provided by the invention detects discrimination height, stable and reliable for performance with device.
Figure of description
Fig. 1 is a false-identifying device structural drawing provided by the invention;
Fig. 2 is the genuine note image;
Fig. 3 is the counterfeit money image;
Fig. 4 is the process flow diagram of detection scheme of the present invention;
Fig. 5 is the indentation feature image of genuine note;
Fig. 6 is the indentation feature image of counterfeit money;
Fig. 7 is a gray-scale value perspective view true, the counterfeit money indentation feature.
Embodiment
Below description and accompanying drawing illustrate specific embodiments of the present invention fully, to enable those skilled in the art to put into practice them.Other embodiments can comprise structure, logic, electric, process and other change.Embodiment only represents possible variation.Only if explicitly call for, otherwise independent assembly and function are optional, and the order of operation can change.The part of some embodiments and characteristic can be included in or replace the part and the characteristic of other embodiments.The scope of embodiment of the present invention comprises the gamut of claims, and all obtainable equivalents of claims.In this article; These embodiments of the present invention can be represented with term " invention " individually or always; This only is for ease, and if in fact disclose and surpass one invention, not that the scope that will automatically limit this application is any single invention or inventive concept.
For reaching the object of the invention, on the one hand, the present invention provides a kind of bank note false distinguishing method, comprising:
Obtain bank note uplifting window formula safety line indentation feature region by the transmission image of light beam transmission;
Analyze the indentation feature in the said image of identification, thereby judge forge or true or paper money.
In some optional embodiment, described light beam is infrared light, ultraviolet light or white light.
In some optional embodiment, the indentation feature in the described analysis recognition image comprises: the image to the indentation feature region carries out pre-service, and pretreated image is analyzed.
In some optional embodiment, said image to the indentation feature region carries out pre-service and comprises:
Binary conversion treatment is carried out to indentation feature region image in safety line position in the positioning image;
To carrying out denoising through the image after the binary conversion treatment.
In some optional embodiment, said pretreated image analysis is comprised: respectively to analyzing through the gray-scale value perspective view through the indentation feature of safety line both sides in the pretreated image.
In some optional embodiment, the x axial coordinate of described gray-scale value perspective view is the pixel number of width of paper money; The y axial coordinate is a gray scale numerical value.
In some optional embodiment, the said analysis through the gray-scale value perspective view comprises:
Through detecting rising edge and the negative edge in the said gray-scale value perspective view, calculate the x axial coordinate difference of corresponding rising edge and negative edge, draw the crest width;
When said crest width satisfies setting range, be the indentation feature of genuine note.
In some optional embodiment, said crest width is the width of bright line.
Another aspect of the present invention provides a kind of bank note false-identifying device, comprising:
Light source and imageing sensor are placed in money transmitting channel both sides up and down respectively;
Imageing sensor obtains bank note uplifting window formula safety line indentation feature region by the transmission image of light beam transmission;
The indentation feature in the said image is discerned in total control circuit analysis, thereby judges forge or true or paper money.
In some optional embodiment, described light source is infrared light supply, ultraviolet source or ordinary light source.
In some optional embodiment, described imageing sensor is contact-type image sensor CIS.
In some optional embodiment, described total control circuit comprises:
Pre-processing module is carried out pre-service to the image of indentation feature region;
Identification module is analyzed pretreated image.
In some optional embodiment, described pre-processing module is used for:
Binary conversion treatment is carried out to indentation feature region image in safety line position in the positioning image;
To carrying out denoising through the image after the binary conversion treatment.
In some optional embodiment, said identification module is respectively to analyzing through the gray-scale value perspective view through the indentation feature of safety line both sides in the pretreated image.
In some optional embodiment, the x axial coordinate of described gray-scale value perspective view is the pixel number of width of paper money; The y axial coordinate is a gray scale numerical value.
In some optional embodiment, described identification module is used for:
Through detecting rising edge and the negative edge in the said gray-scale value perspective view, calculate the x axial coordinate difference of corresponding rising edge and negative edge, draw the crest width;
When said crest width satisfies setting range, be the indentation feature of genuine note.
In some optional embodiment, said crest width is the width of bright line.
Fig. 1 is a false-identifying device structural representation of the present invention.1 is imageing sensor CIS, and 2 is light source, and 3 is money transmitting channel, and 4 are the money transmitting channel inlet, and 5 are the money transmitting channel outlet.After system start-up, bank note is through money transmitting channel inlet 4, through money transmitting channel 3; When the passage that gets between imageing sensor 1 and the light source 2, after pipe is triggered, imageing sensor 1 beginning images acquired; IMAQ finishes; The identification module (not shown) begins identification, stops paper money or note distribution according to recognition result, and bank note transports from money transmitting channel outlet 5 at last.When light source 2 uses infrared or ultraviolet source, can obtain good effect.
Through Fig. 2 and Fig. 3 can obviously find out very, the indentation feature of counterfeit money, Fig. 2 is a genuine note under by the infrared beam transmission, the image that imageing sensor collects, Fig. 3 are the images of counterfeit money.Can find out that counterfeit money does not have light and dark indentation feature pattern around safety line, compare that genuine note then has the light and dark indentation pattern of tangible strip, through edge treated, relevant information is extracted, and signature analysis can detect counterfeit money.
Fig. 4 is the process flow diagram of technical scheme of the present invention, uses false-identifying device of the present invention, imageing sensor obtain bank note uplifting window formula safety line indentation feature region by the transmission image of light beam transmission after; Identification module is analyzed image, at first, and safety line position in the positioning image; Then; In illustrated detection method, after navigating to the safety line position, whether the safety line near zone that detects the left side earlier exists the light and shade striped.Detection method is carried out image and is extracted for to carry out image binaryzation through dynamic many threshold values.Carry out denoising through caustic solution then, the number that last projection exists according to crest if all have described indentation feature, then is judged as genuine note to detect the indentation feature on said safety line both sides; Otherwise, be judged as counterfeit money, shut down or the note distribution processing.
Fig. 5 and Fig. 6 carry out the image after binaryzation, the denoising to genuine note and counterfeit money image respectively.Scheme provided by the invention through to after the banknote image binaryzation and denoising that collect, is analyzed through the gray-scale value perspective view the indentation feature of safety line one side, the indentation feature of opposite side is analyzed through the gray-scale value perspective view again; The gray-scale value perspective view is as shown in Figure 7; The x axial coordinate of this gray-scale value perspective view is the pixel number of width of paper money; The y axial coordinate is a gray scale numerical value.Through detecting the x axial coordinate difference of corresponding rising edge and negative edge; Calculate the crest width; This width corresponds to the width of bright line; Detect the edge of certain magnitude and can confirm whether the starting and ending of said perspective view medium wave peak exists, what starting and ending all existed and width satisfies certain limit promptly is the indentation feature of genuine note.In Fig. 7, the characteristic image of genuine note can obtain the indentation feature perspective view of striped after the y direction of principal axis carries out projection, and genuine note has the fluctuating of tangible Wave crest and wave trough, and counterfeit money is not owing to there is striped, so the curve of projection does not have certain rules.Can find out that from drop shadow curve genuine note has tangible Wave crest and wave trough and has certain width, counterfeit money does not then have this category feature, is mostly poop.Therefore can confirm the existence of crest through the edge that detects certain amplitude, detect the x axial coordinate difference of corresponding rising edge and negative edge simultaneously, calculate the crest width.What meet this condition is legal crest (the bright line in the light and shade striped), thereby carries out true and false judgement according to the number of crest.
Because the indentation feature of fenestration safety line forms when manufacturing paper with pulp bank note and is caused by technology; Do not belong to general false proof point in principle; Absorption characteristic infrared or ultraviolet light when the paper fibre density has taken place to change transmission when making the fenestration safety line thereby the light and shade striped is is different; Cause the bright dark variation of image, this characteristic has extremely hidden security feature.And the counterfeit money of circulation is all in the safety line anti-system of windowing, and safety line magnetic is imitated high emulation coin.Just can't prevent making this indentation feature owing to the manufacture craft of the fenestration safety line that lacks genuine note.Because this characteristic is light and dark fringe spacing under the light beam transmission, and counterfeit money does not all have this type of pattern, so the false distinguishing method is simple, stability is high.The present invention has proposed the indentation feature false distinguishing method and apparatus based on the fenestration safety line of light beam transmission through the principle of analysis realistic problem and the starting point of fraud.With traditional comparing based on the catoptric imaging authenticating currency true and false, the present invention has and is difficult for cracking, advantage such as kind of currencies adaptability is strong, and hardware cost is low.
Detection method provided by the invention and device receive bank note in machinery is walked the paper money chamber, to walk the paper money situation to be influenced lessly, and the effect of obtaining indentation feature also can guarantee.Secondly, for different Currency Types,, also can accomplish the detection of different Currency Type bank note through a set of equipment even the safety line indentation feature has nothing in common with each other in the position of bank note.When distribution new edition bank note, only need just can accomplish device upgrade through software upgrading.Can be when carrying out the mechanical part design so that structure is more compact, device assembles is also convenient.Effectively save hardware cost.Traditional reflective image capture device is owing to need to carry out image recognition in direction up and down, therefore needs up and down two cover collecting devices could accomplish whole collecting works at least.False-identifying device provided by the invention is walked the paper money mode for positive and negative two kinds, distinguishes out the problem that above-below direction can be handled the different images that the diverse location up and down of bank note brings through algorithm.Therefore only need a light source and imaging device can accomplish the images acquired process.Detection method provided by the invention detects discrimination height, stable and reliable for performance with device.
Only if concrete in addition statement; Term such as processing, calculating, computing, confirm, show or the like that can refer to one or more handles or the action and/or the process of computing system or similar devices, said action and/or process will be expressed as other data of the data manipulation of register or the amount of the physics (like electronics) in the storer of the disposal system physical quantity interior with being converted into the storer, register or the storage of other this type of informations, emission or the display device that are expressed as disposal system similarly.Information and signal can use any expression the in multiple different techniques and the method.For example, data, instruction, order, information, signal, bit, symbol and the chip of mentioning in the description on run through can be represented with voltage, electric current, electromagnetic wave, magnetic field or particle, light field or particle or its combination in any.
Should be understood that the particular order of the step in the disclosed process or the instance that level is illustrative methods.Based on design preference, should be appreciated that the particular order of the step in the process or level can be rearranged under the situation that does not break away from protection domain of the present disclosure.Appended claim to a method has provided the key element of various steps with exemplary order, and is not to be limited to described particular order or level.
In above-mentioned detailed description, various characteristics are combined in the single embodiment together, to simplify the disclosure.Should this open method be interpreted as and reflect such intention, that is, the embodiment of theme required for protection need be than the more characteristic of clearly in each claim, being stated of characteristic.On the contrary, that kind of liking enclosed that claims reflected, the present invention is in the state that lacks than whole characteristics of disclosed single embodiment.Therefore, appending claims clearly is merged in the detailed description hereby, and wherein every claim is alone as the independent preferred embodiment of the present invention.
Those skilled in the art it is also understood that various illustrative box, module, circuit and the method step of the embodiment description that combines this paper all can be embodied as electronic hardware, computer software or its combination.For the interchangeability between the hardware and software clearly is described, above various illustrative parts, frame, module, circuit and step have all been carried out usually describing around its function.Be embodied as hardware or be embodied as software as for this function, depend on certain applications and design constraint that total system applied.Those skilled in the art can be directed against each application-specific, realize described function with the mode of accommodation, and still, this realization decision-making should not be construed as and deviates from protection domain of the present disclosure.
Be used to carry out general processor, digital signal processor (DSP), special IC (ASIC), field programmable gate array (FPGA) or other PLD, discrete gate or transistor logic, discrete hardware components or its combination in any of the said function of the application, can realize or carry out the described various illustrative logic diagrams of embodiment, module and the circuit that combine this paper.General processor can be a microprocessor, and perhaps, this processor also can be processor, controller, microcontroller or the state machine of any routine.Processor also possibly be embodied as the combination of computing equipment, and for example, the combination of DSP and microprocessor, a plurality of microprocessor, one or more microprocessor combine with the DSP kernel, perhaps any other this kind structure.
Software module or its combination that can directly be presented as hardware, carry out by processor in conjunction with the step of described method of the embodiment of this paper or method.Software module can be arranged in the storage medium of RAM storer, flash memory, ROM storer, eprom memory, eeprom memory, register, hard disk, mobile disk, CD-ROM or any other form well known in the art.A kind of exemplary storage medium is connected to processor, thereby makes the processor can be from this read information, and can be to this storage medium writing information.Certainly, storage medium also can be the ingredient of processor.Processor and storage medium can be arranged in ASIC.This ASIC can be arranged in user terminal.Certainly, processor and storage medium also can be used as discrete assembly and are present in the user terminal.
For making any technician in this area can realize or use the present invention, above disclosed embodiment is described.To those skilled in the art; The various alter modes of these embodiment all are conspicuous, and the General Principle of this paper definition also can be applicable to other embodiment on the basis that does not break away from spirit of the present disclosure and protection domain.Therefore, the disclosure is not limited to the embodiment that this paper provides, but consistent with the widest scope of disclosed principle of the application and novel features.
Realize that for software the module (for example, process, function etc.) of the said function of describing among the application of technological available execution the application realizes.These software codes can be stored in memory cell and carried out by processor.Memory cell can be implemented in the processor, also can be implemented in outside the processor, and under latter event, it is coupled to processor via various means with communication mode, and these all are well known in the art.
And various aspects as herein described or characteristic can be used as the program design of use standard and/or method, device or the goods of engineering are realized.Term as used herein " goods " is to comprise the computer program that can visit from any computer-readable equipment, carrier wave or medium.For example; Computer-readable medium (for example can include but not limited to magnetic storage apparatus; Hard disk, floppy disk, tape etc.), CD (for example, compact discs (CD), digital versatile disc (DVD) etc.), smart card and flash memory device (for example, EPROM, card, rod, key actuated device etc.).In addition, various storage medium described herein is expressed as one or more equipment and/or other machine readable media that is used for canned data.Term " machine readable media " includes but not limited to can store, comprise and/or carry wireless channel and various other medium of instruction and/or data.
The description of preceding text comprises giving an example of one or more embodiment.Certainly, all possible combination of describing parts or method in order to describe the foregoing description is impossible, but those of ordinary skills should be realized that each embodiment can do further combination and arrangement.Therefore, the embodiment that describes among this paper is intended to contain all such changes, modification and the modification in the protection domain that falls into appended claims.In addition, " comprise " with regard to the term that uses in instructions or claims, the mode that contains of this speech is similar to term and " comprises ", just in claim, is used as that kind that link word is explained as " comprising, ".In addition, using any one term " perhaps " in the instructions of claims is to represent " non-exclusionism perhaps ".
Claims (17)
1. a bank note false distinguishing method is characterized in that, comprising:
Obtain bank note uplifting window formula safety line indentation feature region by the transmission image of light beam transmission;
Analyze the indentation feature in the said image of identification, thereby judge forge or true or paper money.
2. the method for claim 1 is characterized in that, described light beam is infrared light, ultraviolet light or white light.
3. the method for claim 1 is characterized in that, the indentation feature in the described analysis recognition image comprises: the image to the indentation feature region carries out pre-service, and pretreated image is analyzed.
4. method as claimed in claim 3 is characterized in that, said image to the indentation feature region carries out pre-service and comprises:
Binary conversion treatment is carried out to indentation feature region image in safety line position in the positioning image;
To carrying out denoising through the image after the binary conversion treatment.
5. method as claimed in claim 3 is characterized in that, said pretreated image analysis is comprised: respectively to analyzing through the gray-scale value perspective view through the indentation feature of safety line both sides in the pretreated image.
6. method as claimed in claim 5 is characterized in that, the x axial coordinate of described gray-scale value perspective view is the pixel number of width of paper money; The y axial coordinate is a gray scale numerical value.
7. method as claimed in claim 5 is characterized in that, the said analysis through the gray-scale value perspective view comprises:
Through detecting rising edge and the negative edge in the said gray-scale value perspective view, calculate the x axial coordinate difference of corresponding rising edge and negative edge, draw the crest width;
When said crest width satisfies setting range, be the indentation feature of genuine note.
8. method as claimed in claim 7 is characterized in that, said crest width is the width of bright line.
9. a bank note false-identifying device is characterized in that, comprising:
Light source and imageing sensor are placed in money transmitting channel both sides up and down respectively;
Imageing sensor obtains bank note uplifting window formula safety line indentation feature region by the transmission image of light beam transmission;
The indentation feature in the said image is discerned in total control circuit analysis, thereby judges forge or true or paper money.
10. device as claimed in claim 9 is characterized in that, described light source is infrared light supply, ultraviolet source or ordinary light source.
11. device as claimed in claim 9 is characterized in that, described imageing sensor is contact-type image sensor CIS.
12. device as claimed in claim 9 is characterized in that, described total control circuit comprises:
Pre-processing module is carried out pre-service to the image of indentation feature region;
Identification module is analyzed pretreated image.
13. device as claimed in claim 12 is characterized in that, described pre-processing module is used for:
Binary conversion treatment is carried out to indentation feature region image in safety line position in the positioning image;
To carrying out denoising through the image after the binary conversion treatment.
14. device as claimed in claim 12 is characterized in that, said identification module is respectively to analyzing through the gray-scale value perspective view through the indentation feature of safety line both sides in the pretreated image.
15. device as claimed in claim 14 is characterized in that, the x axial coordinate of described gray-scale value perspective view is the pixel number of width of paper money; The y axial coordinate is a gray scale numerical value.
16. device as claimed in claim 14 is characterized in that, described identification module is used for:
Through detecting rising edge and the negative edge in the said gray-scale value perspective view, calculate the x axial coordinate difference of corresponding rising edge and negative edge, draw the crest width;
When said crest width satisfies setting range, be the indentation feature of genuine note.
17. device as claimed in claim 16 is characterized in that, said crest width is the width of bright line.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110088920XA CN102737435A (en) | 2011-04-11 | 2011-04-11 | Paper money discrimination method and device |
| PCT/CN2011/078794 WO2012139354A1 (en) | 2011-04-11 | 2011-08-23 | Paper money identifying method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110088920XA CN102737435A (en) | 2011-04-11 | 2011-04-11 | Paper money discrimination method and device |
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| CN102737435A true CN102737435A (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110088920XA Pending CN102737435A (en) | 2011-04-11 | 2011-04-11 | Paper money discrimination method and device |
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| CN (1) | CN102737435A (en) |
| WO (1) | WO2012139354A1 (en) |
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