EP2899699B1 - Procédé de contrôle de l'authenticité d'un document d'identification - Google Patents

Procédé de contrôle de l'authenticité d'un document d'identification Download PDF

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Publication number
EP2899699B1
EP2899699B1 EP15151016.1A EP15151016A EP2899699B1 EP 2899699 B1 EP2899699 B1 EP 2899699B1 EP 15151016 A EP15151016 A EP 15151016A EP 2899699 B1 EP2899699 B1 EP 2899699B1
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European Patent Office
Prior art keywords
document
image
dimensional
light
transillumination
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EP15151016.1A
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German (de)
English (en)
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EP2899699A1 (fr
Inventor
Ralf Grieser
Andreas Wolf
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Bundesdruckerei GmbH
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Bundesdruckerei GmbH
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Publication of EP2899699A1 publication Critical patent/EP2899699A1/fr
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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
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/206—Matching template patterns

Definitions

  • WO 2010/075881 A1 shows an authentication object for an object and/or a person.
  • U.S. 2009/080760 A1 describes how an anti-counterfeiting mark can be formed in a surface of an object, for example by means of a laser.
  • WO 2006/060090 A1 shows a passport reader.
  • Modern identification documents such as ID cards or driver's licenses, often include a credit card-shaped document body, which can consist, for example, of several laminate layers or of a single plastic layer.
  • document checking devices can be used, which scan the surfaces of the identification documents, in particular the surfaces of the document bodies, with white light, almost infrared light at a wavelength of, for example, 900 nm or with UV-A light (UV: ultraviolet) at a Illuminate wavelength of, for example, 365 nm for capturing image data of surfaces of the identification documents.
  • UV-A light UV: ultraviolet
  • Illuminate wavelength of, for example, 365 nm for capturing image data of surfaces of the identification documents.
  • grazing light illumination can also be provided, in which a surface of an identification document is illuminated from the side. Total forgeries of identification documents can be detected in this way.
  • the present invention is based on the knowledge that the above task can be solved by a three-dimensional, ie spatial reconstruction of the document body and a comparison of the three-dimensional reconstruction with a reference image, which can be three-dimensional.
  • the document body is by means of one or more Illuminated light sources.
  • the light passing through the body of the document is captured, for example, by means of an image camera or an image detector and used for three-dimensional reconstruction, for example a gradient-based reconstruction, such as the 3D video method, or by means of laser beam triangulation.
  • changes in the interior of an identification document ie in the interior of the document body, can be detected which can be traced back to an attempt at forgery or to a forgery of the identification document.
  • the invention relates to a method for checking the authenticity of an identification document, which has a document body, with X-raying the document body with a candling light in order to obtain a X-ray image of the document body, generating a three-dimensional image of the document body from the X-ray image and comparing the three-dimensional image of the document body with a reference image to verify the authenticity of the identification document.
  • the body of the document can, for example, comprise a plurality of laminate layers or consist of a single base material layer and, for example, have the shape of a check card.
  • the identification document can be an ID card, a passport, or a driver's license that is machine-readable.
  • the three-dimensional image is generated from the X-ray image using a three-dimensional reconstruction method, in particular using laser triangulation or the 3D vision method.
  • the three-dimensional reconstruction method can in particular be a gradient method, which enables the three-dimensional reconstruction of the document body on the basis of the transmitted light.
  • simple light sources can be used for transilluminating the body of the document, for example a laser or infrared light sources.
  • the reference image is read from a database via a communication network.
  • a communication link can be set up via a communication network to a remote data server, which provides the database in which several of the reference images of, for example, different document bodies or of different identification documents are stored.
  • the document checking device can send a query to the database in order to obtain a reference image of the identification document to be checked.
  • it can be compared with the three-dimensional image of the document body to be checked in order to check the authenticity of the identification document.
  • the reference image and the three-dimensional image are digital.
  • the reference image may be a three-dimensional reference image that is in the form of a digital image file. Accordingly, the three-dimensional reference image can be in the form of a digital image file.
  • the three-dimensional image is generated on the basis of the transmission image.
  • the X-ray image can be recorded by means of an image detector, for example by means of a digital image camera.
  • the reference image is compared area by area with the three-dimensional image in order to detect imperfections within the document body.
  • the check can be concentrated on areas which, based on experience, are suspected of being manipulated. Such areas can be arranged, for example, below a person's picture.
  • a two-dimensional plane within the document body is determined using the three-dimensional image, in particular by means of a projection, the two-dimensional plane being compared with a two-dimensional reference plane of the reference image in order to identify defects within the document body capture.
  • the reference image can provide one or more two-dimensional reference planes, which can be compared with the two-dimensional plane, for example with the two-dimensional projection plane.
  • the two-dimensional plane can also be in the form of digital data.
  • the transmitted light comes from a wavelength range in which the document body is at least partially light-transparent, in particular from an infrared wavelength range or from an ultraviolet wavelength range.
  • the infrared wavelength range can be 900 nm, for example, while the ultraviolet wavelength range can be 335 nm, for example.
  • the transmitted light is generated by means of a laser, in particular an infrared laser or an ultraviolet laser.
  • a laser in particular an infrared laser or an ultraviolet laser.
  • laser triangulation can be used for the three-dimensional reconstruction in order to obtain the three-dimensional image.
  • the laser can scan the body of the document in a line, for example, in order to enable the three-dimensional reconstruction on the basis of the X-ray image.
  • the X-ray image is recorded by means of a light detector or by means of two light detectors that are offset from one another.
  • the light sources can be designed, for example, to emit light in the aforementioned wavelength ranges.
  • the light sources are offset from one another in order in this way to enable a three-dimensional reconstruction of the document body.
  • a three-dimensional gradient method or the 3D vision method can be used.
  • the imperfections present within the document body can, for example, be light-absorbing or light-scattering, as a result of which they can be made visible in the three-dimensional image, which is a three-dimensional reconstruction of the document card body.
  • the invention relates to a document verification device for verifying the authenticity of an identification document which has a document body, with a transmitted light source for also transilluminating the document body a transmitted light, a light detection device for detecting the transmitted light in order to obtain a transmitted image of the document body, and a processor device which is designed to generate a three-dimensional image of the document body from the transmitted image and to compare the three-dimensional image of the document body with a reference image in order to Check the authenticity of the identification document.
  • the document checking device is set up, for example, to carry out the method for checking the authenticity of an identification document.
  • the transmitted light source comprises a laser or an infrared light source or an ultraviolet light source.
  • the light detection device comprises a light detector, in particular an image camera, or at least two light detectors arranged offset to one another, in particular image cameras.
  • the light detector can be a light sensor or a digital imaging camera, for example.
  • the processor device is designed to generate the three-dimensional image from the transmitted image by means of laser triangulation or a 3D vision method.
  • the processor device is designed to use the three-dimensional image to determine a two-dimensional plane within the document body, in particular by means of a projection, and to compare the two-dimensional plane with a two-dimensional reference plane of the reference image in order to detect imperfections within the document body.
  • the invention relates to a computer program with a program code for carrying out the method for checking the authenticity of an identification document when the program code is executed on a computer or on the document checking device.
  • the document verification device 100 includes a transparent document support 101 on which the identification document can be placed.
  • the document checking device also includes a transmitted light source 103, which is arranged below the transparent document support 101 and is designed to emit transmitted light in the direction of the transparent document support 101 in order to transilluminate the document body of the identification document.
  • a light detection device 105 To detect the transmitted light, i.e. the light passing through the document body, a light detection device 105 is provided which records a transmitted image of the document body.
  • the document checking device 100 also includes a processor device 107, which is designed to generate a three-dimensional image of the document body from the X-ray image and to compare the three-dimensional image of the document body with a reference image, for example a three-dimensional reference image, in order to check the authenticity of the identification document.
  • a processor device 107 which is designed to generate a three-dimensional image of the document body from the X-ray image and to compare the three-dimensional image of the document body with a reference image, for example a three-dimensional reference image, in order to check the authenticity of the identification document.
  • the transmitted light source 103 can be, for example, a laser or an infrared light source with a wavelength of, for example, 900 nm or an ultraviolet light source with a wavelength of, for example, 365 nm.
  • the light detection device 105 comprises a light detector, for example a digital imaging camera. So that the document body can nevertheless be completely X-rayed, the document support 101 can be laterally movable in order to guide the identification document past the light detection device 105, as a result of which different areas of the document body can be X-rayed and detected.
  • the light detection device 105 can comprise two light detectors, for example digital image cameras, which are arranged offset relative to one another.
  • the light detectors can pick up light from different directions and thus detect the body of the document.
  • the document table 101 may be stationary.
  • the document support 101 can also be movable in this case.
  • the light detection device 105 is designed to transfer the X-ray image to the processor device 107 in the form of digital image data.
  • the processor device 107 is designed to three-dimensionally reconstruct the document body on the basis of the X-ray image, i.e. to generate a three-dimensional image of the document body.
  • the processor device 107 can be designed to carry out a gradient method, such as the 3D vision method, or (laser) triangulation.
  • the light detection device 105 comprises two light detectors 201 and 203 arranged offset to one another.
  • the light detectors 201 and 203 can be digital imaging cameras, for example.
  • the three-dimensional image of the document body generated or calculated by the processor device 107 is compared with a reference image in order to detect any imperfections or disturbances within the document body.
  • the faults or imperfections can be formed, for example, by light-absorbing or light-scattering areas within the body of the document, which can be traced back to one or more attempts at manipulation.
  • the reference image is stored in a database 205, which can be reached via a communication network.
  • the document verification device 100 can have an in 1 have a communication interface, not shown, in order to use the Communication network, for example via the Internet to access the remote database 205.
  • an identification document 207 which is based on an in 2 document support, not shown, is irradiated on the back by means of the transmitted light source 103 (backlight).
  • the transmitted light source 103 can generate an infrared light and emit this in the direction of the identification document 207 in order to transilluminate the body of the document.
  • the light detectors 201 and 203 which are arranged offset to one another, detect the light passing through the document body from two different directions in order to obtain the transmitted image, which is evaluated by the processor device 107.
  • the processor device 107 can, for example, use a three-dimensional gradient method such as the 3D vision method in order to three-dimensionally reconstruct the document body and thus obtain the three-dimensional image of the document body.
  • the three-dimensional image is compared with the reference image in order to check the authenticity of the identification document 207.
  • the result of the check can be transmitted, for example via a communication network, to an application which can require the result of the authenticity check.
  • An exemplary application can be carried out, for example, at a border control.
  • the transmitted light source 103 includes a laser 301.
  • the light detection device 105 includes according to in 3 illustrated embodiment a single light detector 303, which can be, for example, a digital imaging camera.
  • the identification document 207 is, for example, in 3 moves in the direction indicated by an arrow at a speed v relative to the laser 301 and relative to the light detector 303 .
  • the in 3 document support not shown, can be moved or moved.
  • the laser 301 shines through the identification document 207 with its document body using a laser light that is projected in a line, for example.
  • the laser light can project other configurations such as dots, crosses, waves and the like. In this way it is possible to use the three-dimensional information for generating the three-dimensional image of the document body with a single light detector 303.
  • the processor device 107 can carry out laser triangulation, for example. Further process steps can, as in connection with the in 1 and 2 described embodiments illustrated, are carried out.
  • the document verification device can, in accordance with the Figures 1 to 3 illustrated embodiments may be formed that in 4 carry out the method shown for checking the authenticity of an identification document.
  • the method comprises x-raying 401 the body of the document with a candescent light to obtain a x-ray image of the document body, generating 403 a three-dimensional image of the document body from the x-ray image and comparing 405 the three-dimensional image of the document body to a reference image in order to verify the authenticity of the identification document check over.
  • One advantage of the concept described above is that structural manipulations of an identification document, which, for example, vary the spatial positions within the body of the document, can be detected.
  • disturbances that are not to be expected in the vicinity of components of the document body, which are light-absorbing, for example, can be detected.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Claims (15)

  1. Procédé de vérification de l'authenticité d'un document d'identification (207) qui possède un corps de document, comprenant :
    éclairage en transparence (401) du corps de document avec une lumière d'éclairage en transparence afin d'obtenir une image d'éclairage en transparence du corps de document ;
    génération (403) d'une représentation tridimensionnelle du corps de document à partir de l'image d'éclairage en transparence ; et
    comparaison (405) de la représentation tridimensionnelle du corps de document avec une représentation de référence afin de vérifier l'authenticité du document d'identification (207),
    le document d'identification (207) étant une carte d'identité, un passeport ou un permis de conduire qui est lisible par machine.
  2. Procédé selon la revendication 1, avec lequel la représentation tridimensionnelle est générée à partir de l'image d'éclairage en transparence au moyen d'un procédé de reconstruction tridimensionnelle.
  3. Procédé selon la revendication 1 ou 2, avec lequel, dans l'étape de comparaison (405), la représentation de référence est lue à partir d'une base de données (205) par le biais d'un réseau de communication.
  4. Procédé selon l'une des revendications précédentes, avec lequel la représentation de référence et la représentation tridimensionnelle sont numériques.
  5. Procédé selon l'une des revendications précédentes, avec lequel la représentation de référence est comparée par zones afin de détecter les points de défaut à l'intérieur du corps de document.
  6. Procédé selon l'une des revendications précédentes, avec lequel, dans l'étape de comparaison (405), un plan bidimensionnel est déterminé l'intérieur du corps de document à l'aide de la représentation tridimensionnelle, notamment déterminé au moyen d'une projection, le plan bidimensionnel étant comparé à un plan de référence bidimensionnel afin de détecter les points de défaut à l'intérieur du corps de document.
  7. Procédé selon l'une des revendications précédentes, avec lequel la lumière d'éclairage en transparence émane d'une plage de longueurs d'onde à laquelle le corps de document est au moins partiellement transparente à la lumière, notamment d'une plage de longueurs d'onde infrarouge ou d'une plage de longueurs d'onde ultraviolette.
  8. Procédé selon l'une des revendications précédentes, avec lequel la lumière d'éclairage en transparence est générée au moyen d'un laser (301), notamment d'un laser infrarouge ou d'un laser ultraviolet.
  9. Procédé selon l'une des revendications précédentes, avec lequel la lumière d'éclairage en transparence est détectée au moyen d'un détecteur de lumière (303) ou au moyen de deux détecteurs de lumière (201, 203) disposés décalés l'un par rapport à l'autre.
  10. Appareil de vérification de documents (100) destiné à vérifier l'authenticité d'un document d'identification (207) qui possède un corps de document, comprenant :
    une source de lumière transmise (103) destinée à éclairer en transparence le corps de document avec une lumière d'éclairage en transparence ;
    un dispositif de détection de lumière (105) destiné à détecter la lumière d'éclairage en transparence afin d'obtenir une image d'éclairage en transparence du corps de document ; et
    un dispositif à processeur (107) qui est configuré pour générer une représentation tridimensionnelle du corps de document à partir de l'image d'éclairage en transparence comparer la représentation tridimensionnelle du corps de document avec une représentation de référence afin de vérifier l'authenticité du document d'identification (207), l'appareil de vérification de document (100) étant conçu pour mettre en œuvre le procédé selon l'une des revendications précédentes,
    le document d'identification (207) étant une carte d'identité, un passeport ou un permis de conduire qui est lisible par machine.
  11. Appareil de vérification de documents (100) selon la revendication 10, avec lequel la source de lumière transmise (103) comprend un laser (301) ou une source de lumière infrarouge ou une source de lumière ultraviolette.
  12. Appareil de vérification de documents (100) selon la revendication 10 ou 11, avec lequel le dispositif de détection de lumière (105) comprend un détecteur de lumière (303), notamment une caméra d'image, ou au moins deux détecteurs de lumière (201, 203) disposés décalés l'un par rapport à l'autre, notamment des caméras d'image.
  13. Appareil de vérification de documents (100) selon la revendication 10, 11 ou 12, avec lequel le dispositif à processeur (107) est configuré pour générer la représentation tridimensionnelle à partir de l'image d'éclairage en transparence au moyen d'une triangulation par laser ou d'un procédé de vision 3D.
  14. Appareil de vérification de documents (100) selon la revendication 10, 11, 12 ou 13, avec lequel le dispositif à processeur (107) est configuré pour déterminer, notamment pour déterminer au moyen d'une projection, un plan bidimensionnel l'intérieur du corps de document à l'aide de la représentation tridimensionnelle, et pour comparer le plan bidimensionnel à un plan de référence bidimensionnel afin de détecter les points de défaut à l'intérieur du corps de document.
  15. Programme informatique comprenant un code de programme destiné à mettre en œuvre le procédé selon l'une des revendications 1 à 9 lorsque le code de programme est exécuté sur un appareil de vérification de documents selon l'une des revendications 10 à 14.
EP15151016.1A 2014-01-17 2015-01-13 Procédé de contrôle de l'authenticité d'un document d'identification Active EP2899699B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014100532.5A DE102014100532A1 (de) 2014-01-17 2014-01-17 Verfahren zum Überprüfen der Echtheit eines Identifikationsdokumentes

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EP2899699A1 EP2899699A1 (fr) 2015-07-29
EP2899699B1 true EP2899699B1 (fr) 2022-07-13

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016203609A1 (de) * 2016-03-04 2017-09-07 Bundesdruckerei Gmbh Sicherheitsgegenstand mit dynamischem und statischem Fenstersicherheitsmerkmal und Verfahren zur Herstellung

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US6728593B2 (en) * 2002-06-06 2004-04-27 The Hong Kong Polytechnic University System for analysis of fabric surface
CA2529460A1 (fr) * 2003-07-04 2005-01-13 Kwang-Don Park Dispositif d'identification aleatoire, et systeme et procede d'identification 3d utilisant ce dispositif
US20110164805A1 (en) * 2010-01-07 2011-07-07 De La Rue North America Inc. Systems and Methods for Detecting an Optically Variable Material
DE102011018823A1 (de) * 2011-04-27 2012-10-31 Witrins S.R.O. Verfahren und Vorrichtung zur Inspektion von gedruckten PCBs
EP2801816A2 (fr) * 2013-05-07 2014-11-12 WiTrins s.r.o. Procédé et dispositif d'analyse optique d'un PCB

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Publication number Priority date Publication date Assignee Title
US7616332B2 (en) * 2004-12-02 2009-11-10 3M Innovative Properties Company System for reading and authenticating a composite image in a sheeting
US20090080760A1 (en) * 2007-09-21 2009-03-26 Microsecurity Lab Inc. Anti-counterfeiting mark and methods
WO2010075881A1 (fr) * 2008-12-29 2010-07-08 Novelty Group Limited Objet d'authentification pour un produit et/ou une personne, un produit et/ou une personne muni d'un objet d'authentification correspondant, procédé d'authentification d'un produit et/ou d'une personne
US8705805B2 (en) * 2011-01-10 2014-04-22 Peter Alexander Forrest Secure portable token and systems and methods for identification and authentication of the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6728593B2 (en) * 2002-06-06 2004-04-27 The Hong Kong Polytechnic University System for analysis of fabric surface
CA2529460A1 (fr) * 2003-07-04 2005-01-13 Kwang-Don Park Dispositif d'identification aleatoire, et systeme et procede d'identification 3d utilisant ce dispositif
US20110164805A1 (en) * 2010-01-07 2011-07-07 De La Rue North America Inc. Systems and Methods for Detecting an Optically Variable Material
DE102011018823A1 (de) * 2011-04-27 2012-10-31 Witrins S.R.O. Verfahren und Vorrichtung zur Inspektion von gedruckten PCBs
EP2801816A2 (fr) * 2013-05-07 2014-11-12 WiTrins s.r.o. Procédé et dispositif d'analyse optique d'un PCB

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EP2899699A1 (fr) 2015-07-29

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