EP0718808A2 - Document authentication system - Google Patents

Document authentication system Download PDF

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Publication number
EP0718808A2
EP0718808A2 EP95308909A EP95308909A EP0718808A2 EP 0718808 A2 EP0718808 A2 EP 0718808A2 EP 95308909 A EP95308909 A EP 95308909A EP 95308909 A EP95308909 A EP 95308909A EP 0718808 A2 EP0718808 A2 EP 0718808A2
Authority
EP
European Patent Office
Prior art keywords
document
digital
colour image
colour
image
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP95308909A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0718808A3 (cs
Inventor
Gregory Scott
John Eccles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NCR International Inc
Original Assignee
NCR International Inc
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 NCR International Inc filed Critical NCR International Inc
Publication of EP0718808A2 publication Critical patent/EP0718808A2/en
Publication of EP0718808A3 publication Critical patent/EP0718808A3/xx
Withdrawn legal-status Critical Current

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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
    • 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

Definitions

  • the illumination control 30 is effective to control the illumination of the LED's 26, 28 in the arrays 22, 24, such that the green LED's, the red LED's and the infrared LED's are operated sequentially and repeatedly, whereby the document 12 is illuminated sequentially and repeatedly by green light, red light and infrared light.
  • This successive illumination is effected at a high speed relative to the movement of the document 12 along the feed path 16, such that successive green, red, and infrared images are captured of substantially the same regions of the document 12.
  • the colour image data stored in the colour image memory 38 is first processed in a recognition and orientation processor 40, using reference data stored in a reference data memory 42, to determine the orientation of the document 12 and to recognize the type of the document 12. For example, if the document 12 is a banknote, the processor 40 will determine in addition to the orientation of the banknote, the country, or issuing bank, and the denomination of the banknote. If the document 12 is not recognised as being of a type for which reference data is stored in the memory 42, a reject signal is produced on an output line 44. The reject signal causes the rejected document to be returned to the input slot or diverted to a reject container (not shown).
  • the type and orientation of the document are determined in the recognition and orientation processor 40 (Fig.1). If the document type is recognised, the flowchart proceeds to block 88, where the document is tested for authenticity. The result of the authenticity test is the output result (block 90). If, at block 86, the document type is not recognised, the flowchart proceeds directly to the output result block 90, as described hereinabove, wherein the authentication processor 48 (Fig.1) produces an output signal on the line 54 in accordance with the determined authenticity or non-authenticity of the document 12 which has been recognised. Thus all recognition and authentication information is presented on the lines 44 and 54.
  • the template matching procedure utilized in the preferred embodiment averages small square regions of the document image, typically regions of size 16 by 16 pixels, thereby reducing the amount of data to be matched and so speeding up the template matching procedure.
  • the template matching procedure is performed on a colour combination image, referred to herein as a grey image.
  • the grey image may be formed by combining the green and red colour images stored in the respective planes 62 and 64 (Fig.3).
  • the green and infrared images as all three images could be combined, to form the grey image.
  • the grey image may be stored in a memory portion of the processor 40.
  • the grey image is averaged by calculating the average pixel intensity value of regions of size 16 by 16 pixels, that is, 256 pixel size square regions. This corresponds to regions of size about 4mm by 4mm. However, regions of other sizes could be used.
  • this averaged image may be stored in a further memory portion of the processor 40, and utilized for matching with templates derived from the reference data memory 42 (Fig.1).
  • the template matching procedure determines the template having the closest match to the averaged image, utilising a predetermined threshold value for rejecting unrecognisable images. It will be appreciated that the closest match template provides information as to the type and orientation of the document 12.
  • the templates stored in the reference data memory 42 generated in a preliminary training procedure during which genuine documents of the types to be recognised are scanned in all four possible orientations.
  • the authentication procedure will now be described with reference to the flowchart 120 shown in Fig. 6. From the start block 122 the flowchart proceeds to block 124 where it is noted that the authentication regions for the determined document type and orientation are selected. Typically between eight and thirty-two regions are used, with a typical size of between 2.5mm and 7.5mm square, although the region size could be greater than these values. Preferably the regions are evenly spaced over document. However, regions which are not evenly space may be selected as appropriate for certain types of document. Since the image of the document is held in the colour image memory 38, regions may be selected dependent on the document type and orientation, under software control, without any hardware modifications for different document types.
  • the mean feature vector (M x ,M y ), shown as point 150, is the centre of an ellipse 160 which corresponds to threshold value T.
  • the ellipse 160 has a major axis 162 and a minor axis 164. If the calculated feature vector lies within the interior 166 of the ellipse 160, i.e. the Mahalanobis distance is less than T, then the corresponding region of the document 12 being authenticated is categorised as authentic. If the calculated feature vector lies outside the ellipse 160, i.e. the Mahalanobis distance is greater than T, then the corresponding region of the document 12 is categorised as non-authentic. If, in a modification, the feature vector has three or more components, then the ellipse would be replaced by an ellipsoid in multidimensional space.
  • the subsidiary testing device 50 may perform tests such as a test for the presence of a metallic strip and/or the presence of magnetic ink.
  • an authentication decision for the document 12 is now made, wherein the document 12 is categorised as authentic only if all, or at least a preselected number, of the selected regions tested for authenticity as described hereinabove have been found to be authentic, and the results of any optional subsidiary tests have also been found to be authentic.
  • the flowchart 120 ends (block 136) and the document 12 can then be utilized for a transaction operation, if authentic, or rejected, if non-authentic.
  • a system for authenticating documents which is suitable for authenticating various types of documents including banknotes, cheques and giros, for example, in a uniform manner.
  • the two-stage procedure of first determining document type and orientation and then determining authenticity enables an efficient document processing system having high security to be provided.
  • unrecognised documents can be rejected immediately, without the need for authentication.
  • Forming a digital colour image assists in providing a two-stage authentication procedure which is highly efficient since use of colour intensity values provides enhanced analysis capabilities and greater accuracy in determining authenticity as compared with monochrome analysis.
  • digital colour information is derived from the whole document, the performance of the recognition and orientation procedure is not degraded by localised marks or damage.
  • the authentication can be focused on selected regions by software control.
  • the system can be easily reconfigured by software modification to handle additional document types.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Collating Specific Patterns (AREA)
EP95308909A 1994-12-10 1995-12-07 Document authentication system Withdrawn EP0718808A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9424971.1A GB9424971D0 (en) 1994-12-10 1994-12-10 Document authentication system
GB9424971 1994-12-10

Publications (2)

Publication Number Publication Date
EP0718808A2 true EP0718808A2 (en) 1996-06-26
EP0718808A3 EP0718808A3 (cs) 1996-07-24

Family

ID=10765746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95308909A Withdrawn EP0718808A2 (en) 1994-12-10 1995-12-07 Document authentication system

Country Status (4)

Country Link
EP (1) EP0718808A2 (cs)
JP (1) JPH08279042A (cs)
GB (1) GB9424971D0 (cs)
ZA (1) ZA9510106B (cs)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2340931A (en) * 1998-08-21 2000-03-01 Celestica Ltd Object colour validation
US6261660B1 (en) 1997-06-17 2001-07-17 Atofina Preparation of a recording carrier
DE10005835A1 (de) * 2000-02-10 2001-08-16 Bundesdruckerei Gmbh Automatische Authentifikation von mit Sicherheitsmerkmalen geschützten Dokumenten
EP1237127A1 (de) * 2001-02-24 2002-09-04 Scheidt & Bachmann Gmbh Verfahren und Vorrichtung zur Durchführung einer Akzeptanzprüfung bei einer automatisierten Banknotenmaschine
WO2002031780A3 (en) * 2000-10-13 2003-03-13 Bank Of England Detection of printing and coating media
NL1030419C2 (nl) * 2005-11-14 2007-05-15 Nl Bank Nv Werkwijze en inrichting voor het sorteren van waardedocumenten.
EP1337977B1 (en) * 2000-11-29 2008-04-30 De La Rue International Limited Optical method and apparatus for inspecting documents
WO2008058742A1 (de) 2006-11-15 2008-05-22 Giesecke & Devrient Gmbh Verfahren zur erkennung von verschmutzungen und/oder farbabnutzungen im bereich von farbübergängen auf wertdokumenten und mittel zur durchführung des verfahrens
WO2008119531A1 (de) * 2007-03-30 2008-10-09 Giesecke & Devrient Gmbh Verfahren und vorrichtung zur prüfung von wertdokumenten
EP1250682B2 (en) † 2000-01-24 2008-12-17 De La Rue International Limited Document monitoring method
US7792354B2 (en) * 2002-12-14 2010-09-07 Samsung Electronics Co., Ltd. Apparatus and method for reproducing skin color in video signal
EP2317481A1 (en) * 1998-07-17 2011-05-04 Imaging Automation, Inc. Secure document reader and method therefor
EP2159072A4 (en) * 2007-05-14 2013-02-27 Internat Frontier Tech Lab Inc AUTHENTIC VALIDATION OF AN OBJECT, AUTHENTICITY VALIDATION SCHIPLESER AND AUTHENTICITY ASSESSMENT PROCEDURE
NL2011739C2 (en) * 2013-11-05 2015-05-07 Nl Bank Nv Banknote counterfeit classification.
CN104809799A (zh) * 2014-01-27 2015-07-29 光荣株式会社 纸币处理装置以及纸币处理方法
US10783400B2 (en) * 2018-04-06 2020-09-22 Dropbox, Inc. Generating searchable text for documents portrayed in a repository of digital images utilizing orientation and text prediction neural networks
CN112597810A (zh) * 2020-06-01 2021-04-02 支付宝实验室(新加坡)有限公司 身份证明文件认证方法和系统
WO2022222904A1 (zh) * 2021-04-20 2022-10-27 北京嘀嘀无限科技发展有限公司 图像验证方法、系统及存储介质
EP4210000A1 (en) * 2022-01-11 2023-07-12 Daon Enterprises Limited Methods and systems for determining authenticity of a document
EP3465637B1 (en) 2016-06-03 2023-08-16 Veridas Digital Authentication Solutions, S.L. A method for authenticating a document

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8202920A (nl) * 1982-07-20 1984-02-16 Tno Inrichting voor het herkennen en onderzoeken van bladvormige voorwerpen zoals bankbiljetten of dergelijke.
EP0294497B1 (en) * 1987-06-08 1993-03-31 Nec Corporation Apparatus for identifying postage stamps
NO893323D0 (no) * 1989-08-18 1989-08-18 Inter Marketing Oy Optisk ekthets-testing av pengesedler og liknende.
JPH05244414A (ja) * 1992-02-28 1993-09-21 Canon Inc 画像処理装置

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6261660B1 (en) 1997-06-17 2001-07-17 Atofina Preparation of a recording carrier
EP2317481A1 (en) * 1998-07-17 2011-05-04 Imaging Automation, Inc. Secure document reader and method therefor
EP0989527A3 (en) * 1998-08-21 2002-07-17 Celestica Limited Method and system for object validation
GB2340931A (en) * 1998-08-21 2000-03-01 Celestica Ltd Object colour validation
EP1250682B2 (en) † 2000-01-24 2008-12-17 De La Rue International Limited Document monitoring method
DE10005835A1 (de) * 2000-02-10 2001-08-16 Bundesdruckerei Gmbh Automatische Authentifikation von mit Sicherheitsmerkmalen geschützten Dokumenten
WO2002031780A3 (en) * 2000-10-13 2003-03-13 Bank Of England Detection of printing and coating media
EP1337977B1 (en) * 2000-11-29 2008-04-30 De La Rue International Limited Optical method and apparatus for inspecting documents
EP1237127A1 (de) * 2001-02-24 2002-09-04 Scheidt & Bachmann Gmbh Verfahren und Vorrichtung zur Durchführung einer Akzeptanzprüfung bei einer automatisierten Banknotenmaschine
US7034323B2 (en) 2001-02-24 2006-04-25 Reheidt & Bachmann Gmbh Method and device for performing a test for acceptability of bank notes by automatic vending machines
US7792354B2 (en) * 2002-12-14 2010-09-07 Samsung Electronics Co., Ltd. Apparatus and method for reproducing skin color in video signal
NL1030419C2 (nl) * 2005-11-14 2007-05-15 Nl Bank Nv Werkwijze en inrichting voor het sorteren van waardedocumenten.
EP1785951A1 (en) * 2005-11-14 2007-05-16 De Nederlandsche Bank N.V. Method and device for sorting security documents
WO2008058742A1 (de) 2006-11-15 2008-05-22 Giesecke & Devrient Gmbh Verfahren zur erkennung von verschmutzungen und/oder farbabnutzungen im bereich von farbübergängen auf wertdokumenten und mittel zur durchführung des verfahrens
RU2451340C2 (ru) * 2006-11-15 2012-05-20 Гизеке Унд Девриент Гмбх Способ распознавания загрязнений и/или истираний краски в зоне переходов цветов на ценных документах и средства для осуществления этого способа
US8588477B2 (en) 2006-11-15 2013-11-19 Giesecke & Devrient Gmbh Method for identifying soiling and/or colour fading in the region of colour transitions on documents of value, and means for carrying out the method
WO2008119531A1 (de) * 2007-03-30 2008-10-09 Giesecke & Devrient Gmbh Verfahren und vorrichtung zur prüfung von wertdokumenten
RU2469405C2 (ru) * 2007-03-30 2012-12-10 Гизеке Унд Девриент Гмбх Способ и устройство для проверки ценных документов
CN101681532B (zh) * 2007-03-30 2013-07-31 德国捷德有限公司 检查有价文件的方法和设备
EP2159072A4 (en) * 2007-05-14 2013-02-27 Internat Frontier Tech Lab Inc AUTHENTIC VALIDATION OF AN OBJECT, AUTHENTICITY VALIDATION SCHIPLESER AND AUTHENTICITY ASSESSMENT PROCEDURE
NL2011739C2 (en) * 2013-11-05 2015-05-07 Nl Bank Nv Banknote counterfeit classification.
CN104809799A (zh) * 2014-01-27 2015-07-29 光荣株式会社 纸币处理装置以及纸币处理方法
EP2899698A1 (en) * 2014-01-27 2015-07-29 Glory Ltd. Banknote processing apparatus and banknote processing method
US9792699B2 (en) 2014-01-27 2017-10-17 Glory Ltd. Banknote processing apparatus and banknote processing method
EP3465637B1 (en) 2016-06-03 2023-08-16 Veridas Digital Authentication Solutions, S.L. A method for authenticating a document
US10783400B2 (en) * 2018-04-06 2020-09-22 Dropbox, Inc. Generating searchable text for documents portrayed in a repository of digital images utilizing orientation and text prediction neural networks
US11645826B2 (en) 2018-04-06 2023-05-09 Dropbox, Inc. Generating searchable text for documents portrayed in a repository of digital images utilizing orientation and text prediction neural networks
CN112597810A (zh) * 2020-06-01 2021-04-02 支付宝实验室(新加坡)有限公司 身份证明文件认证方法和系统
WO2022222904A1 (zh) * 2021-04-20 2022-10-27 北京嘀嘀无限科技发展有限公司 图像验证方法、系统及存储介质
EP4210000A1 (en) * 2022-01-11 2023-07-12 Daon Enterprises Limited Methods and systems for determining authenticity of a document
US12293599B2 (en) 2022-01-11 2025-05-06 Daon Technology Methods and systems for determining authenticity of a document

Also Published As

Publication number Publication date
EP0718808A3 (cs) 1996-07-24
JPH08279042A (ja) 1996-10-22
ZA9510106B (en) 1996-06-06
GB9424971D0 (en) 1995-02-08

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