WO2012083712A1 - Procédé et dispositif d'identification de papier-monnaie - Google Patents

Procédé et dispositif d'identification de papier-monnaie Download PDF

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Publication number
WO2012083712A1
WO2012083712A1 PCT/CN2011/078788 CN2011078788W WO2012083712A1 WO 2012083712 A1 WO2012083712 A1 WO 2012083712A1 CN 2011078788 W CN2011078788 W CN 2011078788W WO 2012083712 A1 WO2012083712 A1 WO 2012083712A1
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WO
WIPO (PCT)
Prior art keywords
banknote
image
counterfeit
light source
unit
Prior art date
Application number
PCT/CN2011/078788
Other languages
English (en)
Chinese (zh)
Inventor
陈新
李蒙
唐辉
成和建
鲍东山
Original Assignee
北京新岸线软件科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京新岸线软件科技有限公司 filed Critical 北京新岸线软件科技有限公司
Publication of WO2012083712A1 publication Critical patent/WO2012083712A1/fr

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Classifications

    • 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

Definitions

  • the present invention relates to the field of image processing and recognition technology, and in particular to a banknote identification method and apparatus. Background technique
  • the present invention provides a banknote discriminating method and apparatus for obtaining banknotes by using transmitted light.
  • a banknote discriminating method provided by an embodiment of the present invention is provided with an image acquiring unit, a light source and a banknote passage in the banknote discriminating device for use, wherein the image acquiring unit and the light source are respectively located in the banknote passage of the banknote identifying device Side, the method includes:
  • the light source illuminates the banknote to be tested during the passage of the banknote to be tested, and the image acquisition unit uses the transmitted light of the banknote to collect an anti-counterfeit logo image of a predetermined position on the banknote by using the light source. ;
  • the authenticity of the banknote is determined based on the processed security image.
  • the embodiment of the present invention further provides a banknote discriminating device, comprising an image acquiring unit, a light source, and a banknote passage, wherein the image acquiring unit and the light source are respectively located on two sides of the banknote passage of the banknote identification device;
  • the light source illuminates the banknote to be tested, and the image acquisition unit uses the transmitted light of the light source to collect an image of the anti-counterfeit mark on the banknote;
  • the device further includes:
  • An image processing unit configured to process the collected anti-counterfeit identification image
  • a determining unit configured to determine the authenticity of the paper currency according to the anti-counterfeiting identification image processed by the image processing unit.
  • the invention provides a banknote identification method and device, which uses the transmitted light to obtain an image of the anti-counterfeit mark on the banknote, and determines the authenticity of the banknote by identifying the acquired image of the anti-counterfeit mark.
  • the limitations of algorithmic processing under reflective imaging can be overcome.
  • the banknote detecting solution provided by the invention is easy to implement, has low realization cost, and the detection is fast and accurate, so that the counterfeit currency can be detected quickly, and the effect is more obvious.
  • FIG. 1 is a flow chart of a method for authenticating a banknote according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a banknote discriminating device provided in an embodiment of the present invention.
  • FIG. 3 is a flowchart of processing in a method for discriminating bills according to an embodiment of the present invention
  • FIG. 4Aa is an image of a complementary counterprint pattern of genuine and counterfeit coins collected in an embodiment of the present invention
  • FIG. 4Bb is an embodiment of the present invention
  • FIG. 4Cc is an image of the true and false coin complementary to the ancient coins pattern after the denoising and binarization processing provided in the embodiment of the present invention
  • FIG. 4Dd is a representation of the true and false coin complementary to the edge of the Indian coin pattern respectively provided in the embodiment of the present invention.
  • 4Ee are respectively a gray-scale binary image of a true and a counterfeit coin complementary to an ancient coin pattern provided in an embodiment of the present invention.
  • Figure 5ab is a binary projection curve of the true and false coin complementary to the ancient coins pattern provided in the embodiment of the present invention. detailed description
  • the present invention provides a banknote discriminating method and apparatus, which uses transmitted light to acquire an image of an anti-counterfeit mark on a banknote, and determines the banknote by recognizing the acquired image of the anti-counterfeit mark.
  • the authenticity The limitations of algorithmic processing under reflective imaging can be overcome.
  • the banknote detection solution provided by the invention is easy to implement, the realization cost is low, the detection is fast and accurate, and the counterfeit currency can be detected quickly, and the effect is more obvious.
  • the genuine coin complementary printing feature is a front-back one-time printing technique
  • the printed pattern can be accurately overlapped.
  • the ⁇ _coin is printed twice on the front side and the back side, so that it is impossible to accurately overlap the complementary print pattern, and often misalignment, overlap, etc. can be detected only in the case of transmission.
  • an image acquisition unit, a light source and a banknote passage are disposed in the banknote identification device, and the image acquisition unit and the light source are respectively located on both sides of the banknote passage of the banknote identification device, 1.
  • the method includes the following steps:
  • the image of the anti-counterfeit mark on the banknote can be realized by the following means:
  • the image acquisition unit may use a contact image sensor CIS or a CMOS or a CCD.
  • the anti-counterfeiting mark is a front-back complementary print pattern, and may also be other marks such as a watermark (image or number), a holographic magnetic security line, and the like. 502, processing the anti-counterfeit identification image collected by the collection;
  • the overlapping effect cannot be seen under reflection, and the recognition and judgment cannot be performed, but in the transmission, the images formed by the overlapping of the front and back sides can be easily collected.
  • the authenticity of the banknote can be judged based on the image formed by the coincidence.
  • the ancient coins in the 05 version of the coin the ancient coins can be printed on the back and back, and the ancient coins can be formed according to the collected and processed images.
  • a detection module may be provided at the entrance of the banknote passage of the banknote discriminating device, and when it is detected that the banknote passes through the entrance of the banknote passage, the light source is turned on, and the image acquisition unit is triggered to start collecting images on the banknote. This controls the operating state of the relevant functional unit of the bill discriminating device.
  • the present invention further provides a banknote discriminating device 200 having an image capturing unit 10, a light source 20, and a banknote passage 30.
  • the banknote detecting device further includes:
  • the image acquisition unit 10 and the light source 20 are respectively located on both sides of the banknote passage 30 of the banknote identification device.
  • the light source 20 illuminates the banknote to be tested, and the image acquisition unit 10 transmits through the light source 20.
  • the transmitted light of the banknote collects an image of the anti-counterfeit mark on the banknote;
  • the image processing unit 40 is configured to process the collected anti-counterfeit mark image;
  • the determining unit 50 is configured to determine the authenticity of the banknote according to the anti-counterfeiting logo image processed by the image processing unit.
  • the image acquisition unit 10 uses a contact image sensor CIS or CMOS or CCD.
  • the anti-counterfeiting logo is a complementary printed image of the offset back, specifically, the fifth set of coins used in the renminbi.
  • the determining unit forms a complete graphic based on whether the printed coins are coincident in the processed image.
  • the bill discriminating device 200 further includes:
  • the sensing unit 60a is configured to detect the banknote specification to determine a range of areas in which the banknote security mark may appear;
  • an infrared pair tube (or other device) can be used as the sensing unit.
  • the control unit 70 is configured to control the light source to illuminate the area of the area on the banknote to be tested, and control the image collection unit to collect an image of the area range.
  • the image collection unit collects a full-size image of the banknote to be tested; the device further includes:
  • a positioning unit 80 configured to locate an anti-counterfeit identification area based on the full-size image
  • the image acquisition unit 10 acquires an image of the security feature based on the area determined by the positioning unit 80.
  • the image processing unit 40 specifically includes:
  • the first processing module 40a performs filtering processing and morphological denoising processing on the image of the area where the anti-counterfeiting mark is located; and/or
  • the second processing module 40b performs image binarization on the image of the area where the anti-counterfeiting mark is located; and/or
  • the third processing module 40c is configured to remove fixed noise.
  • the banknote discriminating device provided by the invention further comprises:
  • the detecting unit 60b is disposed in the banknote passage for detecting the banknote entering the banknote passage; when detecting that the banknote passes through the banknote passage entrance, the detecting unit 60b issues an indication signal, turns on the light source, and triggers the image acquiring unit 10 to start ⁇ An image on the banknote is collected.
  • the image of the anti-counterfeit mark on the banknote can be realized in different ways.
  • the full-size image of the banknote to be tested can be collected first, and then the area of the pseudo-marker is located in the full-size image. , then intercept the image of the anti-counterfeit logo.
  • an image obtained by intercepting an anti-counterfeit mark from a full-size image is used.
  • an example of a coin-complementing coin-type coin pattern is taken as an example.
  • the specific processing flow is as follows:
  • the authentication device is activated, and the banknote is started;
  • the image acquisition unit (such as CIS, CMOS or CCD) and the light source are respectively located on both sides of the banknote passage of the banknote identification device, and the light source transmits the full image of the banknote through the transmitted light of the banknote.
  • the position of the banknote can be determined based on the front and back of the crown number, thereby determining the position of the offset print pattern (i.e., the ancient coin pattern shown in Figs. 4A and 4a).
  • the crown number coordinate is used as a reference point for the offset printing on the printed pattern, and the complementary offset printing is intercepted.
  • FIG. 4C and FIG. 4c are images of the true and false coin complementary to the ancient coin pattern after denoising and binarization respectively, and comparing Out, the obvious difference between true and false coins.
  • image registration recognition based on gray scale and binary map based can be used.
  • the projected image is projected according to the symmetry direction of the pattern, and the registration detection is performed according to the symmetry of the projected image.
  • the projection map is symmetrical based on the center position of the pattern, as shown in Fig. 5a, so that the left and right data are subtracted correspondingly at the center point for such features, and the absolute values of all subtraction results are summed.
  • the residuals that can be obtained are much smaller in the real currency than the counterfeit currency, because the real coins are symmetrical, and the counterfeit projections are asymmetrical based on the center of the pattern, as shown in Figure 5b.
  • the center point of the pattern can already be positioned from above. From the direction of the symmetry axis, the real coins will be basically symmetrical, while the 4 renminbi cannot be overlapped due to printing misalignment and the like, and is not completely symmetrical. Therefore, after positioning the symmetry axis, the left and right halves are cropped, and the mature gradation-based template matching technique can be used for matching.
  • the experience threshold is set. You can distinguish between genuine and counterfeit currency.
  • the image of the anti-counterfeit mark e.g., the complementary pair of coins of the renminbi
  • the image of the anti-counterfeit mark is collected directly according to the range of areas in which the detected banknote security mark may appear.
  • the image position of the area where the anti-counterfeiting mark is located (vertical direction, the position in the horizontal direction is determined according to the denomination and the face of the banknote), and the processing can be speeded up.
  • the position of the set can be set by software without changing the hardware structure.
  • the area where the anti-counterfeiting mark is located is used as the coarse positioning position.
  • the image is collected, and the image of the image is binarized and morphologically filtered.
  • the printed pattern is accurately positioned according to the processed image.
  • the symmetry of the pattern is then used to register in the binary image and the grayscale image, thereby identifying whether the banknote is a genuine coin or a counterfeit currency.
  • the invention provides a banknote identification method and device, which uses the transmitted light to obtain an image of the anti-counterfeit mark on the banknote, and determines the authenticity of the banknote by identifying the acquired image of the anti-counterfeit mark.
  • the limitations of algorithmic processing under reflective imaging can be overcome.
  • the banknote detecting solution provided by the invention is easy to implement, has low realization cost, and the detection is fast and accurate, so that the counterfeit currency can be detected quickly, and the effect is more obvious.
  • the transmission method used in the present invention performs counterfeiting, and the hardware cost is reduced relative to the reflective image analysis, making it easier to productize.
  • the invention provides a new anti-counterfeiting means, provides a new means of authentication, increases the strength of the authentication, and combines the existing authentication means to further prevent the circulation of counterfeit currency from the root. Because complementary printing technology is a high-end technology in printing technology, and the requirements for printing presses are very high. It is difficult for counterfeit currency to achieve the same effect as the true coin in the degree of coincidence of the chroma and the complementary image. The counterfeit currency is difficult to achieve complete registration, and generally there will be misalignment and overlap.
  • the processing algorithm provided by the invention has universality, and the complementary printing technology is an anti-counterfeiting technology commonly used in various countries, and the implementation characteristics are similar. Therefore, the algorithm is similar in implementation, and it is easier to modularize when upgrading, and the upgrade is more convenient. It is easier to reach the requirement of identifying multiple currencies in one machine.
  • the present invention can be implemented or used by those skilled in the art in light of the disclosed embodiments. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope and spirit of the invention. The above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and principles of the present invention, should be included in Within the scope of protection of the present invention.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'identification de papier-monnaie. Une image d'identification anti-contrefaçon d'un papier-monnaie est obtenue par le biais d'une lumière de transmission, puis l'image d'identification anti-contrefaçon est identifiée, ce qui permet de déterminer si le papier-monnaie est authentique ou contrefait. Le procédé d'identification de papier-monnaie évite ainsi les limitations d'un traitement par algorithmes soumis à imagerie de réflexion, si bien que le procédé d'identification de papier-monnaie est facile à mettre en oeuvre, de faible coût, et assure une détection précise permettant de détecter rapidement de l'argent contrefait.
PCT/CN2011/078788 2010-12-23 2011-08-23 Procédé et dispositif d'identification de papier-monnaie WO2012083712A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201010602559 CN102096961A (zh) 2010-12-23 2010-12-23 一种纸币鉴别方法及装置
CN201010602559.3 2010-12-23

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CN102096961A (zh) * 2010-12-23 2011-06-15 北京新岸线软件科技有限公司 一种纸币鉴别方法及装置
DE102011121911A1 (de) * 2011-12-21 2013-06-27 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zur Prüfung eines Sicherheitsmerkmals eines Wertdokuments
CN102799886A (zh) * 2012-06-14 2012-11-28 陕西科技大学 一种纸张水印边界定位及品质识别方法
CN103136845B (zh) * 2013-01-23 2015-09-16 浙江大学 一种基于冠字号图像特征的人民币鉴伪方法
CN104240364A (zh) * 2013-06-14 2014-12-24 张枫 人民币冠字号记录系统
CN103702021A (zh) * 2013-12-29 2014-04-02 广州视声电子科技有限公司 一种验钞摄像头
CN103879806B (zh) * 2014-04-02 2016-08-17 广州广电运通金融电子股份有限公司 薄片类介质图像获取装置
JP6292016B2 (ja) * 2014-05-13 2018-03-14 沖電気工業株式会社 鑑別装置及び媒体取引装置
CN104063940B (zh) * 2014-06-13 2016-08-31 昆山古鳌电子机械有限公司 纸币处理装置及现金自动交易装置
CN104318257B (zh) * 2014-08-20 2017-08-04 深圳大学 纸币识别方法与系统
CN105096446B (zh) * 2015-07-20 2017-12-05 深圳怡化电脑股份有限公司 一种折角钞光变油墨鉴伪识别的方法及系统
CN105006062B (zh) * 2015-07-29 2018-06-29 深圳怡化电脑股份有限公司 一种识别纸币的方法及存取款装置
CN105405203B (zh) * 2015-10-22 2018-01-02 深圳怡化电脑股份有限公司 一种鉴别人民币真伪的方法和系统
CN106447897A (zh) * 2016-08-15 2017-02-22 深圳怡化电脑股份有限公司 一种检测纸币磁性特征的方法及装置
CN106683261B (zh) * 2016-12-22 2019-07-26 深圳怡化电脑股份有限公司 一种纸币的鉴伪方法和装置
CN106875538A (zh) * 2017-01-20 2017-06-20 深圳怡化电脑股份有限公司 获取冠字号信息的方法和装置
CN106683264B (zh) * 2017-02-20 2020-07-21 深圳怡化电脑股份有限公司 一种污损冠字号的识别方法及装置
CN106934914B (zh) * 2017-03-17 2020-03-27 深圳怡化电脑股份有限公司 纸币防伪检测的方法及装置
CN107067533A (zh) * 2017-04-14 2017-08-18 深圳怡化电脑股份有限公司 一种纸币鉴别的方法及装置
CN107341901A (zh) * 2017-08-28 2017-11-10 李欣鑫 具有鉴别伪钞功能的收银机及其验钞方法
CN108062820B (zh) * 2017-11-29 2019-10-15 深圳怡化电脑股份有限公司 一种纸币检测方法、纸币检测装置及电子设备
CN113269918A (zh) * 2020-09-16 2021-08-17 深圳怡化时代智能自动化系统有限公司 一种纸介质的鉴别方法及装置

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CN108537945B (zh) * 2018-03-09 2020-09-15 深圳怡化电脑股份有限公司 票据水印检测方法、系统及自助设备

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