CN107767534A - A kind of method of comprehensive detection guiding against false of paper currency feature - Google Patents
A kind of method of comprehensive detection guiding against false of paper currency feature Download PDFInfo
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- CN107767534A CN107767534A CN201610700670.3A CN201610700670A CN107767534A CN 107767534 A CN107767534 A CN 107767534A CN 201610700670 A CN201610700670 A CN 201610700670A CN 107767534 A CN107767534 A CN 107767534A
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Classifications
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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
- G07D7/121—Apparatus characterised by sensor details
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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
- G07D7/20—Testing patterns thereon
- G07D7/2008—Testing patterns thereon using pre-processing, e.g. de-blurring, averaging, normalisation or rotation
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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
- G07D7/20—Testing patterns thereon
- G07D7/2016—Testing patterns thereon using feature extraction, e.g. segmentation, edge detection or Hough-transformation
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- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
The invention discloses a kind of method of comprehensive detection guiding against false of paper currency feature, including：In transparent send, white light source, LASER Light Source and total reflection prism are set above paper money passage；White light source irradiates region to be detected positioned at region oblique upper to be detected in paper money passage is sent, with a default angle of inclination；Color sensor and white light source opposite position；Laser sensor and LASER Light Source opposite position；Total reflection prism is located at white light source between the input path of the reflected light path on region to be detected to color sensor；Infrared sensing switch is positioned at region fore to be detected on transparent Transfer pipe；When infrared sensing switch senses to bank note enter region to be detected, trigger white light source and LASER Light Source is lighted in turn, when white light source is lighted, image is gathered with color sensor, when LASER Light Source is opened, image is gathered with laser sensor；Handle and analyze the false proof point in the image under image and LASER Light Source under white light source, export false distinguishing result.
Description
Technical field
The present invention relates to image procossing and identification technology field, and in particular to a kind of false distinguishing detection side of bank note or bill
Method.
Background technology
With the continuous development of national economy, RMB cash transaction amount constantly increases, and bank note is the people of China's distribution
The main currency of coin, plays very important effect in economic activity, and also there is criminal's manufacture and circulation always
Counterfeit money and technique of composite-RMB bank note, this very disruptive financial order and economic stability, damage the public interest of country.
In order to improve the azimuthal capability of banknote, paper false proof, ink is false proof and the anti-counterfeiting technology such as antiforge is continuous
Exploitation and improvement, in recent years, with the continuous development of anti-counterfeiting technology, the production application of anti-counterfeiting technology product is also sent out rapidly
Exhibition.
One mode of the false distinguishing in financial machine and tool field is namely based on the banknote false distinguishing of color.In traditional paper money counter, sorting
The machine image detection equipment of detection in to(for) color characteristic is typically based on CMOS/CIS/CCD catoptric imaging mode, collects coloured silk
After color image, then detected with the mode of image procossing, corresponding equipment is also largely used.There is discoloration to imitate in anti-counterfeiting characteristic
The false proof point of fruit has very strong anti-counterfeit capability, i.e., characteristic point is observed under a different angle is presented different colors；As light can
Sensitive ink, antiforge laser holographic etc..Therefore a kind of traditional naturally mode is exactly to put CMOS/CIS/ in different angles
CCD or other adopt figure equipment, then synchronous acquisition image, extraction point is carried out to the color of image feature collected in systems
Analysis, has the function that false distinguishing.Therefore need to be directed in the mixed point of bank note because bank note towards difference causes characteristic point is each may go out
Existing position installation multiple images collecting device can just detect false proof point, and such hardware cost is of a relatively high.
The design of existing banknote identification system as shown in figure 1, subject matter be bank note towards it is different when, false distinguishing point
Test position is different, it is therefore necessary to can complete IMAQ in the collecting device that each test position is laid, then sentence
Disconnected module can just be further processed.Therefore the problem of detection for becoming color characteristic certainly exists is hardware device quantity
More, system cost height, hardware circuit driving is complicated, mechanical realization is complicated, rigging up and debugging is complicated, model machine is difficult to commercialization etc.
Problems.Such as the detection for Optical Variable Ink discoloration, it usually needs install two IMAQs in front and side and set
It is standby, so for towards just needing in the case of mixed point 8 collecting devices could to complete whole image acquisition process, system is
Follow-up identification process can be completed.In this case, system architecture is complicated, and the problems such as debugging difficulty is big necessarily occur.
Number of patent application is 2007101663473, and title " multi-angle optical characteristic automatic detection apparatus " is by introducing mirror
The mode in face, the optical environment of detection zone is changed, practically equal to and light incidence is changed in the case of not translation-angle
With the direction of reflection, so as to reach the purpose that two different angle optical signatures are observed in same visual field, but in general is put down
Face mirror is formed in the rear electroplate of glass, because the reflecting effect of level crossing depends on the silver-plated effect of producer, and is plated
Silver and the inconsistency brought in imaging that easily comes off；Referring to Fig. 2, level crossing light multiple reflections into ghost image light path schematic diagram,
Wherein, S is object, and S1 is the main picture of object, and S2/S3 is the image of other reflections.The preceding surface of level crossing is glass surface
Reflection light, light will pass through glass surface and silver-colored face multiple reflections, so forming image overlap into multiple pictures, influenceing figure
As the processing of judge module.It is most bright that imaging (main picture) wherein reflected by silver-colored face for the first time, and it is other as then increasingly
Secretly, although will not typically arouse attention, for the optical instrument of precision, such as camera, telescope, microscope equipment
In, these unnecessary pictures must be driven off, horizontal higher and higher current for faking, former caused by the defects of optical system itself
Rationality error also must go to except can be only achieved the optimal of system, so as to which good basis is laid in the design for product and false distinguishing.
The content of the invention
In view of this, the invention provides a kind of method of comprehensive detection guiding against false of paper currency feature, including：
Transparent send between cash dispensing port and note input mouth sets white light source, LASER Light Source and total reflection rib above paper money passage
Mirror；
The white light source is set to be irradiated positioned at region oblique upper to be detected in paper money passage is sent with a default angle of inclination
The region to be detected；
Color sensor and white light source opposite position are set；
Laser sensor and LASER Light Source opposite position are set；
The total reflection prism is set to be located at the white light source in the reflected light path on the region to be detected to described
Between the input path of color sensor；
Infrared sensing is set to switch positioned at region fore to be detected on the transparent Transfer pipe；
When infrared sensing switch senses to bank note enter region to be detected, the white light source and the laser light are triggered
Source is lighted in turn, when white light source is lighted, image is gathered with color sensor, when LASER Light Source is opened, with laser sensing
Device gathers image；
Handle and analyze the false proof point in the image under image and LASER Light Source under white light source, export false distinguishing result.
It is preferred that when triggering the white light source unlatching, gathering on bank note, there is honorable light to become characteristic and complementary pair print
The position of characteristic.
It is preferred that when triggering the LASER Light Source unlatching, gathering has relief printing plate, the position of engraving and printing feature on bank note
Put.
It is preferred that between to set the white light source and the angle of the area planar to be detected be 40 degree to 50 degree；If
The angle for putting the total reflection prism bottom surface and the area planar to be detected is between 70 degree to 80 degree.
It is preferred that the white light source collected by comparing color sensor directly reflects in the region to be detected
Imaging of the imaging with the white light source after total reflection prism reflection, judge whether to have honorable light to become characteristic；It is logical
The imaging for judging that the white light source that color sensor collects directly reflects in the region to be detected is crossed, judges whether have
There is complementary pair to print characteristic.
It is preferred that also include：A beam-splitting board is also set up between the color sensor and the region to be detected, should
The light that beam-splitting board is sent to the white light source carries out semi-transflective reflective.
It is preferred that the white light source is LED white lights.
Three wavelength white lights of fluorescent material, the colour cell of multi-chip type three are added to close it is preferred that the LED white lights are blue-ray LED
One of two kinds of white LED lamp.
It is preferred that also setting up mounting plate, the LASER Light Source, white light source and color sensor are fixedly connected with upper
On supporting plate, the mounting plate is provided with the hole with LASER Light Source, white light source and color sensor position correspondence, by the laser light
Source, white light source and color sensor are inserted in the hole.
It is preferred that also setting up bottom plate, the laser sensor is fixedly connected on bottom plate, the bottom plate is provided with
With the hole of laser sensor position correspondence, the laser sensor is inserted in the hole.
The false distinguishing method of bank note provided by the invention, multinomial false proof point can be detected simultaneously, improve false distinguishing
Speed and the degree of accuracy.
Figure of description
Fig. 1 is conventional banknotes color identification system design structure schematic diagram；
Fig. 2 is level crossing light multiple reflections into ghost image light path schematic diagram；
Fig. 3 is the system schematic of the embodiment of the present invention one；
Fig. 4 is the system schematic of the embodiment of the present invention two；
Fig. 5 is the false distinguishing workflow diagram of the embodiment of the present invention three.
Embodiment
【Embodiment one】
The embodiments of the invention provide a kind of paper money discrimination device, as shown in figure 3, including：
Cash dispensing port 301；
Note input mouth 302；
Transparent between cash dispensing port 301 and note input mouth 302 send paper money passage 303；
In transparent white light source 304, LASER Light Source 305 and the total reflection prism 306 for sending and being set above paper money passage 303；
The white light source 304 is positioned at the oblique upper of region 307 to be detected in paper money passage 303 is sent, with a default inclination angle
Degree irradiates the region 307 to be detected；
Color sensor 308, positioned at the position corresponding with white light source 304；
Laser sensor 309, positioned at the position corresponding with LASER Light Source 305；
Total reflection prism 306 is located at the white light source 304 in the reflected light path on the region 307 to be detected to described
Between the input path of color sensor 308；
Infrared sensing switch 310, the front of region 307 to be detected on the transparent Transfer pipe 303, for sensing
When entering region 307 to be detected to bank note, trigger the white light source 304 and the LASER Light Source 305 and light in turn, Yi Ji
When white light source 304 is lighted, triggering color sensor 308 gathers image, when LASER Light Source 305 is lighted, triggers laser sensing
Device 309 gathers image；
Image processor 311, it is connected respectively with color sensor 308 and laser sensor 309, handles and analyze white light light
The image that source 304 collects when lighting, judges whether bank note there is honorable light to become characteristic and complementary pair print characteristic；And processing is simultaneously
The image that analysis LASER Light Source 305 collects when lighting, judges whether bank note has relief printing plate, engraving and printing feature.
Arbiter 312, it is connected with image processor 311, for the comprehensive judged result to each anti-counterfeiting characteristic, output is treated
Detect the false distinguishing result of bank note.
The purpose of design total reflection prism 306 of the embodiment of the present invention is the image that can obtain two kinds of angles, first, white
Radiant 304 directly reflexes to the image of color sensor 308, i.e. direct picture under irradiating；Another kind is through total reflection prism
Image after 306 reflections, i.e. side image.Due to the two images of different angle can be obtained simultaneously, therefore, for different angles
The anti-forgery feature point of degree and design, such as honorable light become characteristic, you can realize false distinguishing.In addition, the anti-counterfeiting characteristic based on transmission, this
The transparent of inventive embodiments send paper money passage 303 to provide condition for the discriminating of this false proof point, by being adopted to color sensor 308
The direct picture collected is analyzed, you can discriminate whether that there is the anti-counterfeiting characteristic based on transmission, such as complementary pair print feature.
It is preferred that the color sensor 308 and the laser sensor 309 can be according to default rules only for paper
The ad-hoc location collection image of coin.For example, when white light source 304 is opened, color sensor 308, which only gathers, has light on bank note
Glory becomes the position of characteristic and complementary pair print characteristic.When LASER Light Source 305 is opened, laser sensor 309 is only gathered and adopted on bank note
Collecting has relief printing plate, the position of engraving and printing feature on bank note.So as to reduce the processing data amount of image, the speed of false distinguishing identification is improved
Degree.
It is preferred that between the white light source 304 and the angle of the plane of region to be detected 307 are 40 degree to 50 degree；
The angle of the bottom surface of total reflection prism 306 and the plane of region to be detected 307 is between 70 degree to 80 degree.
Wherein, the white light source 304 is LED white lights.
Three wavelength white lights of fluorescent material, the colour cell of multi-chip type three are added to close it is preferred that the LED white lights are blue-ray LED
One of two kinds of white LED lamp.
It is preferred that described device also includes mounting plate 313, the LASER Light Source 305, white light source 304 and color are passed
Sensor 308 is fixedly connected with mounting plate 313, and the mounting plate 314 is provided with and LASER Light Source 305, white light source 304 and face
The hole of the position correspondence of colour sensor 308, the LASER Light Source 305, white light source 304 and color sensor 308 are inserted in described
Kong Zhong.
Correspondingly, bottom plate 314 is additionally provided with, the laser sensor 309 is fixedly connected on bottom plate 314, institute
Bottom plate 314 is stated to insert in the hole provided with the hole with the position correspondence of laser sensor 309, the laser sensor 309.
When bank note is put into note input mouth 302, along when sending paper money passage 303 to be transferred into region 307 to be detected, trigger first
The light beam that white light source 304 is launched is impinged upon on bank note, and after light beam is launched on bank note, the total reflection prism 306 connects
Light source projects are received to caused reflected light on the bank note, 45 ° are more than light from the critical of glass injection air due to incidence angle
42 ° of angle, light can be totally reflected on prism bases, into projecting on 90 degree of direction during finally along incidence, and will not shape
Into ghost image.
The height and angle of color sensor 308 cause in its field range while comprising the paper on region 307 to be detected
The picture of coin and the bank note in total reflection prism 306, when bank note reaches region 307 to be detected, triggering color sensor 308 starts
Image is gathered, two bank note glazing glories are contained in a two field picture and become characteristic pattern；Afterwards, through image processor 311 to clapping
The image taken the photograph carries out a series of pretreatment, feature extraction, Threshold Analysis, and synthesis obtains final result.Bank note has
The honorable light having becomes characteristic pattern can change with viewing angle difference, the color of this feature.
There is some possible bank note honorable light to become the pattern of feature in the one side of bank note, and another side does not have, for example, 2015 editions
100 yuan of denomination RMB.Become the pattern of feature in the white light source 304 and total reflection rib when just having honorable light on bank note
During 306 side of mirror, it will detect that honorable light becomes characteristic；But if when bank note has the pattern reverse side that honorable light becomes feature, nothing
Method detects that honorable light becomes characteristic.Now, in order to improve false distinguishing efficiency and not increase hardware cost, bank note direction is not turned
To processing, the structure not also being acquired in opposite side increase to honorable light change feature, but it is complementary based on transmissison characteristic detection
To seal puppet region, the transparent of the embodiment of the present invention send paper money passage 303 to provide condition for the discriminating of this false proof point, by right
The direct picture that color sensor 308 collects is analyzed, you can discriminate whether that there is the anti-counterfeiting characteristic based on transmission, such as
Complementary pair prints feature.
【Embodiment two】
As shown in figure 4, the present embodiment also includes relative to embodiment one：
A beam-splitting board 415, the beam-splitting board 415 are also set up between color sensor 408 and the region to be detected 407
The light sent to white light source 404 carries out semi-transflective reflective.
Wherein, the beam-splitting board 415 and the plane in the region 407 to be detected is set to preset angle in one.
It is preferred that the beam-splitting board 415 should be located at immediately below color sensor 408, it is highly consistent with white light source 404,
The beam-splitting board 415 is sent out white light source 404 close to the one end of white light source 404 higher than datum plane into 45 degree of angles, the beam-splitting board 415
The light gone out carries out semi-transflective reflective；The color sensor 408 can pass through beam-splitting board 415 and gather image；By white light source 404
The light beam of injection, after beam-splitting board 415 is shone, a part reflects, directive bank note, so equivalent to the positive light intensity of reinforcement,
The direct picture for photographing the color sensor 408 becomes apparent from, and increases positive color effects, can further increase
The aberration of direct picture and side image, judge module is set to be more prone to differentiate the color-changing anti-counterfeit feature of bank note.
Compared with the multiple reflections refractive power of level crossing constantly decays, using the light energy of total reflection prism all from rib
Reflected in mirror, under identical illumination condition, image frame more limpid in sight will be obtained, brought for subsequent treatment
Advantage.
【Embodiment three】
Fig. 5 shows the process for carrying out false distinguishing to bank note to be detected or bill using false-identifying device of the present invention.
System starts, and bank note is received from note input mouth, through sending paper money passage to be sent to default position (region to be detected), triggering
White light source is opened, and to reaching the collection image of the bank note on the region, the image collected includes light source in region to be detected
Photoimaging, and light source are reflected in the reflected light reflection photoimaging after total reflection prism reflects again in region to be detected.Afterwards, carry
The honorable optically variable anti-counterfeiting feature of bank note in image is taken, by contrasting positive feature color value, lateral feature color value and positive side
The difference of region feature color value, Threshold Analysis is carried out, to determine whether to detect that honorable light becomes feature；Also extract bank note in image
Complementary pair print anti-counterfeiting characteristic, by compare positive feature color value carry out Threshold Analysis, to determine whether to detect complementary pair
Print feature.Then trigger the white light source to close, triggering LASER Light Source is opened, to reaching the bank note collection figure on the region
Picture, bank note is detected using LASER Light Source and laser sensor：First, specialty inks are detected using laser；Second,
Relief printing plate, engraving and printing are detected using laser；The specialty inks and print characteristics of bank note are carried out by laser sensor
After collection, after filtering, amplify, signal is sent into master control processing system after A/D conversions；Master control processing control system passes through certain
Algorithm it is analyzed and identifies the true and false of bank note.Synthesis becomes the testing result of characteristic to honorable light and to complementary pair print
Testing result judges whether to meet genuine note feature, if it is determined that being counterfeit money, is shut down or note distribution is handled.
According to the disclosed embodiment, those skilled in the art can be enabled to realize or using the present invention.It is right
For those skilled in the art, the various modifications of these embodiments are it will be apparent that and the general principles that define here
Other embodiment can also be applied on the basis of the scope and spirit of the present invention are not departed from.Embodiment described above is only
Presently preferred embodiments of the present invention, it is not intended to limit the invention, within the spirit and principles of the invention, that is made appoints
What modification, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of method of comprehensive detection guiding against false of paper currency feature, including：
Transparent send between cash dispensing port and note input mouth sets white light source, LASER Light Source and total reflection prism above paper money passage；
The white light source is set positioned at region oblique upper to be detected in paper money passage is sent, with described in a default angle of inclination irradiation
Region to be detected；
Color sensor and white light source opposite position are set；
Laser sensor and LASER Light Source opposite position are set；
The total reflection prism is set to be located at the white light source in the reflected light path on the region to be detected to the color
Between the input path of sensor；
Infrared sensing is set to switch positioned at region fore to be detected on the transparent Transfer pipe；
When infrared sensing switch senses to bank note enter region to be detected, the white light source and the LASER Light Source wheel are triggered
Flow point is bright, when white light source is lighted, gathers image with color sensor, when LASER Light Source is opened, is adopted with laser sensor
Collect image；
Handle and analyze the false proof point in the image under image and LASER Light Source under white light source, export false distinguishing result.
2. the method as described in claim 1, it is characterised in that：
When triggering the white light source unlatching, the position that there is honorable light to become characteristic and complementary pair print characteristic on bank note is gathered.
3. the method as described in claim 1, it is characterised in that：
When triggering the LASER Light Source unlatching, gathering has relief printing plate, the position of engraving and printing feature on bank note.
4. the method as described in claim 1, it is characterised in that：
Between to set the white light source and the angle of the area planar to be detected be 40 degree to 50 degree；
It is between 70 degree to 80 degree to set the angle of the total reflection prism bottom surface and the area planar to be detected.
5. the method as described in claim 1, it is characterised in that：
The imaging and institute that the white light source collected by comparing color sensor directly reflects in the region to be detected
Imaging of the white light source after total reflection prism reflection is stated, judges whether that there is honorable light to become characteristic；
The imaging directly reflected in the region to be detected by judging the white light source that color sensor collects, judge
Whether there is complementary pair print characteristic.
6. the method as described in claim 1, it is characterised in that also include：
A beam-splitting board is also set up between the color sensor and the region to be detected, the beam-splitting board is to the white light
The light that light source is sent carries out semi-transflective reflective.
7. the method as described in claim 1, it is characterised in that：
The white light source is LED white lights.
8. method as claimed in claim 7, it is characterised in that：
The LED white lights are the white LED lamp that blue-ray LED adds three wavelength white lights of fluorescent material, the colour cell of multi-chip type three to close
One of two kinds.
9. the method as described in claim 1, it is characterised in that：
Mounting plate is also set up, the LASER Light Source, white light source and color sensor are fixedly connected with mounting plate, it is described
Mounting plate is provided with the hole with LASER Light Source, white light source and color sensor position correspondence, by the LASER Light Source, white light source
Inserted in the hole with color sensor.
10. method as claimed in claim 9, it is characterised in that：
Bottom plate is also set up, the laser sensor is fixedly connected on bottom plate, the bottom plate is provided with and laser sensing
The hole of device position correspondence, the laser sensor are inserted in the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610700670.3A CN107767534A (en) | 2016-08-22 | 2016-08-22 | A kind of method of comprehensive detection guiding against false of paper currency feature |
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| CN201610700670.3A CN107767534A (en) | 2016-08-22 | 2016-08-22 | A kind of method of comprehensive detection guiding against false of paper currency feature |
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| CN107767534A true CN107767534A (en) | 2018-03-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031409A (en) * | 2019-03-15 | 2019-07-19 | 南京华科和鼎信息科技有限公司 | A kind of multispectral anti-counterfeiting characteristic checks equipment and the method for inspection |
| CN111612454A (en) * | 2020-03-19 | 2020-09-01 | 于贵庆 | Electronic currency detection platform applying block chain |
| CN113379959A (en) * | 2021-06-10 | 2021-09-10 | 广州市银科电子有限公司 | Method, equipment and storage medium for identifying bank note |
-
2016
- 2016-08-22 CN CN201610700670.3A patent/CN107767534A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031409A (en) * | 2019-03-15 | 2019-07-19 | 南京华科和鼎信息科技有限公司 | A kind of multispectral anti-counterfeiting characteristic checks equipment and the method for inspection |
| CN111612454A (en) * | 2020-03-19 | 2020-09-01 | 于贵庆 | Electronic currency detection platform applying block chain |
| CN113379959A (en) * | 2021-06-10 | 2021-09-10 | 广州市银科电子有限公司 | Method, equipment and storage medium for identifying bank note |
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