EP2956915B1 - Procede d'authentification d'un document d'identite - Google Patents

Procede d'authentification d'un document d'identite Download PDF

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Publication number
EP2956915B1
EP2956915B1 EP14704155.2A EP14704155A EP2956915B1 EP 2956915 B1 EP2956915 B1 EP 2956915B1 EP 14704155 A EP14704155 A EP 14704155A EP 2956915 B1 EP2956915 B1 EP 2956915B1
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European Patent Office
Prior art keywords
image
identification document
spatial position
features
determined
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EP14704155.2A
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German (de)
English (en)
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EP2956915A1 (fr
Inventor
Olaf Dressel
Olga Kulikovska
André LEOPOLD
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Bundesdruckerei GmbH
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Bundesdruckerei GmbH
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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
    • 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
    • G07D7/003—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 security elements
    • 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

  • the present invention relates to the field of checking the authenticity of an identification document.
  • the publication US 2005/1292821 shows a method for verifying a hologram.
  • the publication WO 92/01975 A1 shows a method for identifying a hologram.
  • the publication EP 2 320 390 A1 shows a method and system for reading and validating identification documents.
  • the publication US 2008/267514 A1 Fig. 15 shows a method of determining whether or not a test object is an authentic object.
  • Modern identification documents usually have optical security features which enable verification of the authenticity of an identification document.
  • Known optical security features are for example holograms, engraved gravure features or security features that include fluorescent colors.
  • a static image of the security feature is usually recorded, which is compared with a likewise static reference image.
  • the authenticity of an identification document can be determined on the basis of a similarity of the recorded image with the reference image.
  • a mobile recording of a Identification document is also a dynamic overall process, which can affect a focusing error and a motion blur.
  • the invention is based on the finding that the above object can be achieved by exploiting viewing angle-dependent representations of a security feature of an identification document.
  • viewing angle-dependent representations is to be understood as meaning identical or different representations of the security feature as a function of a viewing, viewing angle and / or illumination angle on the security feature, such as, for example, a hologram.
  • a movement dynamics of a mobile reading device can be utilized to record a plurality of images of an identification document or of a security feature from different perspectives perspectives. This results in a sequence of image-dependent shots of the security feature. This image sequence can be compared with a reference image sequence. In this way, it is possible to dispense with the observance of predefined static space conditions when receiving an identification document or a security feature.
  • the identification document it is required to bring the identification document with respect to the recording camera in different spatial positions, which can be described by a motion vector.
  • This makes efficient use of the dynamics of motion in a mobile recording. If the reference image sequence depicts different spatial position views of the identification document or of the security feature in accordance with the motion vector, it is possible for the detected image sequence to match the motion vector Reference image sequence are assumed. In this comparison, for example, characteristic security features in the image sequence can be compared with reference features.
  • the invention relates to a method for checking the authenticity of an identification document which has a security feature with viewing angle-dependent representations, with capturing a first image of the identification document with the security feature in a first spatial position of the identification document, and capturing a second image of the identification document with the security feature in a second spatial position of the identification document in order to obtain an image sequence with different spatial positions of the identification document, and comparing image features of the acquired image sequence with reference features in order to verify the authenticity of the identification document.
  • the spatial position of the identification document arises, for example, by a tilting of the identification document with respect to a receiving device or with respect to a previous spatial position of the identification document.
  • the identification document and / or a recording device is moved in space to obtain the image sequence.
  • characteristic, in particular predetermined image features of the acquired image sequence can be taken into account. If these image features are, for example, corner points of a quadrilateral, a different arrangement of the characteristic vertices with respect to each other arises due to a perspective distortion in the respective spatial positions. This arrangement can be defined, for example, an extension or a compression of an imaginary quadrilateral indicated by the corner points.
  • the reference features or their position in different spatial positions or views can be from a geometric, possibly multi-dimensional, point model that as Reference model serves to be determined by a rotation, compression and / or extension.
  • the security feature can be, for example, a hologram or an embossing with viewing angle-dependent representations or properties or an application of paint, which can be iridescent.
  • the first spatial position of the identification document is determined in the step of capturing the first image, and in the step of capturing the second image, the second spatial position of the identification document is determined.
  • properties of the identification document in particular geometric properties, such as edge run, can be used to detect the respective spatial position.
  • the image sequence is detected by means of a recording device, and the respective spatial position is determined relative to a recording device.
  • the respective spatial position arises for example by a rotation or by a tilting of the identification document with respect to the receiving device, in particular with respect to an arrangement, i. a spatial position, the receiving device.
  • the respective spatial position is determined on the basis of a perspective distortion of an edge image of the identification document.
  • the perspective distortion can be, for example, that due to a change in a spatial position of the identification document from a predetermined by the edges of the identification document rectangle a trapezoid with two longer and two shorter legs is displayed.
  • the image features of the image sequence are extracted from at least one captured image, in particular digitally extracted.
  • the image features, in particular characteristic image features, which may be previously known, can be specified.
  • the characteristic image features can be extracted on the basis of image pattern recognition. According to one implementation, it can be assumed that the image features of the security feature are predetermined and therefore can be extracted.
  • the reference features are determined by a reference model, and the reference model is processed to obtain reference features according to the spatial position as first reference features, and to obtain the reference features according to the second spatial position as second reference features.
  • the reference model can be defined, for example, by a function which describes a change of an arrangement of image features as a function of a spatial position and / or independence from an arrangement of a luminous source which was used to record the reference image or the reference image sequence.
  • the reference model may represent the change of an arrangement of the reference features relative to each other in response to a motion vector.
  • the motion vector can correspond to the motion vector which arises when the identification document is brought from the first spatial position into the second spatial position.
  • the reference model may represent a sequence of arrays of reference features in different spatial locations.
  • a motion vector for a transition from the first spatial position to the second spatial position is determined, and the reference model is processed according to the determined motion vector, in particular perspective distorted. If the arrangement of the reference features is predetermined, for example, by a grid, the motion factor specifies how this arrangement is to be moved in space, for example, to be rotated.
  • the reference model is a digital model of the security feature.
  • the digital model may specify the reference features in the form of digital values.
  • the reference features are determined by a reference model, wherein the reference model is given by a reference function which determines an array of reference features depending on a spatial position or a perspective view, or wherein the reference model is a digital multidimensional model of the security feature, in particular a grid model or is a point model. Due to the reference function, the arrangement of Reference features determined in dependence on a perspective view of the reference model or the identification document.
  • the image features are extracted from the first image as first image features and from the second image as second image features.
  • a digital pattern recognition can be performed.
  • the identification document in the step of acquiring the first image and in the step of acquiring the second image, is illuminated by means of a luminous source arranged at a spatial position with respect to the identification document, and the first reference image and the second reference image are the arrangement of a luminous source at the Room position assigned.
  • the position of the light source can be detected, which angle-dependent image is detected.
  • the position of the light source can thus be a further parameter in the examination of the identification document for authenticity, according to one embodiment.
  • the spatial position of the light source relative to the identification document is determined.
  • the position of the light source can thereby be determined by means of an optical sensor.
  • the position of the light source corresponds to the position of the receiving device. This is true, for example, when the light source is a flash of a mobile phone, such as a smartphone, and the receiving device is the camera of the smartphone.
  • the spatial position of the light source relative to the identification document is determined.
  • the image features are compared at different spatial positions with reference features, which are assigned to different spatial positions and / or motion vectors of the identification document and / or different spatial positions of a light source.
  • reference features which are assigned to different spatial positions and / or motion vectors of the identification document and / or different spatial positions of a light source.
  • the reference features are extracted security features of a reference image sequence of the security feature in different spatial positions.
  • the method is carried out by means of a recording device, in particular a smartphone, with a display, and a desired spatial position of the identification feature is displayed with respect to the recording device on the display.
  • the invention relates to an identification document with a security feature, wherein the security feature comprises at least one of the following structures with viewing angle-dependent representations: at least one embossment, which comprises different viewing angle-dependent optical properties, in particular reflection properties or absorption properties or emission properties, an application of paint viewing angle-dependent reflection properties, an optical element, in particular a lens or a hologram or a reflective film.
  • the security feature comprises at least one of the following structures with viewing angle-dependent representations: at least one embossment, which comprises different viewing angle-dependent optical properties, in particular reflection properties or absorption properties or emission properties, an application of paint viewing angle-dependent reflection properties, an optical element, in particular a lens or a hologram or a reflective film.
  • the identification document is, for example, an identification document, a passport, a means of payment, for example a bank card or a credit card, a driver's license, a company ID card, a bill of lading or an authorization card.
  • the identification document can also be any other document whose identity and authenticity is to be confirmed.
  • a recording device 101 which may be a mobile reading device or a smartphone and may comprise a recording camera, which allows optical recording of the identification document 103.
  • the identification document 103 is brought into different spatial positions 103-1 and 103-2 with respect to the receiving device 101.
  • the transition between the spatial positions 103-1, 103-2 is in Fig. 1 represented by an arrow which symbolizes a motion vector.
  • the motion vector describes the transition of the identification document 103 from the first spatial position 103-1 to the second spatial position 103-2.
  • the motion vector can be described by means of coordinates in a multi-dimensional space.
  • the recording device 101 is designed to record at least one image of the identification document 103 or the security feature 104 per spatial position.
  • the security feature 104 for example a hologram, characterized viewing angle-dependent properties or representations, the recordings of the security feature 104 in the different spatial positions 103-1, 103-2 are different. This results in an image sequence which can be compared with a reference image sequence, which includes reference images of the security feature in corresponding spatial positions relative to a reference recording device.
  • the receiving device 101 for example, stationary, so that the identification document 103 is transferred into the different spatial positions by moving the identification document 103 with respect to the receiving device.
  • Fig. 2 shows an embodiment in which the identification document 103 is mounted stationary and in which the receiving device 101 is brought into different spatial positions 101-1 and 101-2, for example by tilting or twisting, with respect to the identification document 103.
  • the spatial position of the identification document 104 also changes relative to the receiving device 101 in the different spatial positions of the receiving device 101.
  • the recording device when shooting the images of the security feature 104, a position of one in the Fig. 1 and 2 not shown, which illuminates the security feature 104.
  • the light source can be arranged at any point in space. According to one embodiment, however, the recording device itself may comprise a light source, for example a flash of a smartphone.
  • the recorded image sequence can be compared with a reference image sequence which comprises images of reference images with a reference light source whose position corresponds to the position of the light source with respect to the security feature 104.
  • the respective images of the image sequence can be compared with the images of the reference image sequence.
  • image features may be compared to reference features.
  • the image features can be, for example, predetermined features and / or characteristic features in the respective image, for example corner points.
  • the respective spatial position of the identification document 103 with respect to the receiving device 101 can be determined.
  • an edge reduction can be performed.
  • the perspective distortion of a contour of the identification document 103 in different spatial positions of the identification document 103 with respect to the receiving device 101 can be determined.
  • the identification document 103 is located in a first spatial position in which, for example, a surface of the identification document 103 is arranged parallel to a surface of the receiving device 101, for example of a mobile radio device.
  • the image recorded by the recording device 101 changes, so that now a second image B is recorded, which may differ from the first image A.
  • the image sequence is A, B, so that image features of the images of the image sequence can be compared with reference features.
  • the security feature 104 for example, a hologram, so the spatial position of the light source 301 together with the respective spatial position of the identification document 103 affects the recordable, ie from the view of the receiving device 101 visible image according to one embodiment.
  • the spatial position of the light source with respect to the receiving device or with respect to the security feature in the choice of the reference image sequence is taken into account.
  • the location of the light source can be assumed to be known according to one embodiment.
  • the position of the luminous source with respect to the receiving device or with respect to the identification document can be determined.
  • a test image can be generated in advance.
  • the position of the luminous source can also be determined on the basis of the recorded image sequence.
  • certain images of the security feature 104 can only be recorded in certain positions of the light source 301 with respect to the identification document.
  • Fig. 5 illustrates the inventive concept based on an imaginary hemisphere 401, in the center of the identification document 103 is arranged with the feature 104.
  • an imaginary solder 403 On the feature 104, for example, there is centrally located an imaginary solder 403, the length of which may correspond to a radius of a spherical imaging surface.
  • the positions of the receiving device 101 on the spatial positions 1a and 1b relative to the identification document 103 can be assumed to be mathematically known or calculable at a distance and / or angle.
  • the optical imaging plane of the feature 103 on the identification document 104 is represented by the dashed contours 2a and 2b and lies, for example, tangentially to the surface of the hemisphere 401.
  • a first image 2a is generated by the impingement of illumination from the direction 3a, 3b, this can be recognized as a known feature.
  • the type, in particular image, and the conditions for the formation of the image in particular the position of the light source to the identification document 103th or the security feature 104, as well as the location of the resulting image known.
  • the imaging surface of a camera lens system 1a, 1b of the recording device 101 is plane-parallel to the imaging planes 2a, 2b of the security feature 104, there are no translatory between the camera lens system 1a and 2a or between the imaging planes 1b and 2b or other corrections necessary, which could arise, for example, by turning, tilting or tilting.
  • a targeted positioning of the receiving device 101 on the spatial position 1b take place so that the expected image 2b can be found there.
  • the two found positions may be related to a definition of a behavior of the feature, i. For example, the viewing angle dependent properties of the feature to be compared.
  • Fig. 6 shows a diagram of a method for verifying the authenticity of an identification document having a security feature with viewing angle-dependent representations.
  • the method comprises the step of capturing 601 a first image of the identification document with the security feature in a first spatial position of the identification document and capturing 603 of a second image of the identification document with the security feature in a second spatial position of the identification document, to an image sequence in different spatial positions of the identification document receive.
  • the spatial positions of the identification document for example, relative spatial positions of the identification document 103 with respect to the receiving device 101, as for example in the Fig. 1 and 2 is shown.
  • the method further comprises comparing 605 image features in the captured image sequence with reference features to verify the authenticity of the identification document.
  • the reference features can be taken, for example, a memory which is either arranged in the receiving device or can be reached by the receiving device, for example via a communication network.
  • the method may further comprise determining the respective spatial position of the identification document, for example on the basis of an edge detection.
  • the detection 601, 603 can be performed, for example, by taking optical images of the first image and the second image.
  • the method comprises determining a test object, i. a referencing.
  • the method further comprises determining the spatial position of the entire identification document with respect to the receiving device.
  • the method comprises extracting the first, for example random, test pattern of the security feature at a specific position from reference and position information.
  • the reference and position information can be determined for example from a device-internal sensors or additional optical information such as horizon position.
  • the successive picks i. Detection steps of the images of the image sequence, for example, can be carried out at short intervals, whereby the so-called videographing can be realized.
  • the distances may be longer than in videographing, so that a multi-shot recording method can be realized thereby.
  • the method further comprises determining a positional change between the images and a derivative of one or more motion vectors and, optionally, solid angles.
  • the method further comprises comparing the image sequence with a reference image sequence or with a reference model of a security feature, for example a hologram.
  • the method may include a comparison with a known image sequence depending on the angular direction.
  • the recorded images of a security feature in particular a hologram, must appear in different spatial positions in the same sequence and with the same content as determinable on the basis of the reference model.
  • the reference model may be a 3D reference model that may derive or represent an array of reference features at different angles of view.
  • the method may further comprise a comparison with a generic reference model describing a 3D space, so that the recordable recordable images for the respective spatial position can be derived.
  • the illumination or the spatial position of the light source remains as a further parameter for an example holographic appearance of the security feature.
  • this can be extracted because an entry into the three-dimensional reference model of the security feature can take place at a first known or matching position.
  • the method begins at a first known spatial position of the identification document with respect to the receiving device and at a predetermined spatial position of a luminous source.
  • an integrated flash in the receiving device, for example in a smartphone, since its spatial arrangement, ie spatial position, is determined with respect to the receiving device or with respect to its camera and the identification document.
  • a deliberate change of the spatial position in a direction favorable to the test also makes it possible to test the identification document for authenticity.
  • the goal is to obtain a further representation of the security feature known in execution and position dependency.
  • This can be realized according to an embodiment by an augmented reality interface.
  • a desired spatial position of the identification document with respect to the receiving device or an indication of the spatial position can be displayed on a display of the receiving device become.
  • information about a previously known position of a lighting source with respect to the identification document or the security feature can be utilized.
  • previously known reflection or reflection properties of the identification document or its surface at predetermined positions of a lighting source can be used to determine or estimate the actual position.

Claims (11)

  1. Procédé de vérification de l'authenticité d'un document d'identification comportant une caractéristique de sécurité dont la présentation varie en fonction de l'angle d'observation, comprenant :
    la capture (601) d'une première image du document d'identification à caractéristique de sécurité dans une première position spatiale du document d'identification, et la capture (603) d'une deuxième image du document d'identification à caractéristique de sécurité dans une deuxième position spatiale du document d'identification, afin d'obtenir une séquence d'images dans différentes positions spatiales du document d'identification ; et
    la comparaison (605) de caractéristiques d'images de la séquence d'images capturée avec des caractéristiques de référence pour vérifier l'authenticité du document d'identification, caractérisé en ce que les caractéristiques de référence sont définies par un modèle de référence, et que le modèle de référence est traité pour obtenir les caractéristiques de référence suivant la première position spatiale en tant que premières caractéristiques de référence, et pour obtenir les caractéristiques de référence suivant la deuxième position spatiale en tant que deuxièmes caractéristiques de référence, la première position spatiale du document d'identification étant déterminée lors de l'étape de capture (601) de la première image et la deuxième position spatiale du document d'identification étant déterminée lors de l'étape de capture (603) de la deuxième image, la séquence d'images étant capturée au moyen d'un dispositif d'enregistrement (101), et où chaque position spatiale étant déterminée par rapport au dispositif d'enregistrement (101).
  2. Procédé selon la revendication 1, où chaque position spatiale est déterminée sur la base d'une distorsion due à la perspective d'une image de bord du document d'identification.
  3. Procédé selon l'une des revendications précédentes, où les caractéristiques d'images de la séquence d'images sont extraites d'au moins une image capturée, en particulier extraites numériquement.
  4. Procédé selon l'une des revendications précédentes, où un vecteur de mouvement est déterminé pour un passage de la première position spatiale à la deuxième position spatiale, et où le modèle de référence est traité suivant le vecteur de mouvement déterminé.
  5. Procédé selon l'une des revendications précédentes, où le modèle de référence est donné par une fonction de référence déterminant un agencement de caractéristiques de référence en fonction d'une position spatiale ou d'une vue en perspective, ou où le modèle de référence est un modèle multidimensionnel numérique de la caractéristique de sécurité.
  6. Procédé selon l'une des revendications précédentes, où les caractéristiques d'images sont extraites de la première image en tant que premières caractéristiques d'images et de la deuxième image en tant que deuxièmes caractéristiques d'images.
  7. Procédé selon l'une des revendications précédentes, où, lors de l'étape de capture de la première image et lors de l'étape de capture de la deuxième image, le document d'identification est éclairé au moyen d'une source lumineuse agencée sur une position spatiale par rapport au document d'identification, et où une première image de référence et une deuxième image de référence sont associées à l'agencement d'une source lumineuse sur la position spatiale.
  8. Procédé selon la revendication 7, où la position spatiale de la source lumineuse est déterminée par rapport au document d'identification.
  9. Procédé selon l'une des revendications précédentes, où, lors de l'étape de comparaison, les caractéristiques d'images dans différentes positions spatiales sont comparées avec des caractéristiques de référence associées à différentes positions spatiales et/ou différents vecteurs de mouvement du document d'identification et/ou à différentes positions spatiales d'une source lumineuse.
  10. Procédé selon l'une des revendications précédentes, où les caractéristiques de référence sont des caractéristiques de sécurité extraites d'une séquence d'images de référence de la caractéristique de sécurité dans différentes positions spatiales.
  11. Procédé selon l'une des revendications précédentes, ledit procédé étant exécuté au moyen d'un dispositif d'enregistrement avec un affichage, et où une position spatiale de consigne de la caractéristique d'identification par rapport au dispositif d'enregistrement est indiquée sur l'affichage.
EP14704155.2A 2013-02-18 2014-02-13 Procede d'authentification d'un document d'identite Active EP2956915B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013101587.5A DE102013101587A1 (de) 2013-02-18 2013-02-18 Verfahren zum überprüfen der echtheit eines identifikationsdokumentes
PCT/EP2014/052818 WO2014125022A1 (fr) 2013-02-18 2014-02-13 Procédé de vérification de l'authenticité d'un document d'identification

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EP2956915A1 EP2956915A1 (fr) 2015-12-23
EP2956915B1 true EP2956915B1 (fr) 2018-12-26

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DE (1) DE102013101587A1 (fr)
WO (1) WO2014125022A1 (fr)

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EP4171051A1 (fr) * 2021-10-20 2023-04-26 FUJIFILM Business Innovation Corp. Dispositif, programme et procédé de collationnement

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RU2644513C1 (ru) 2017-02-27 2018-02-12 Общество с ограниченной ответственностью "СМАРТ ЭНДЖИНС СЕРВИС" Способ детектирования голографических элементов в видеопотоке
FR3064782B1 (fr) * 2017-03-30 2019-04-05 Idemia Identity And Security Procede d'analyse d'un document structure susceptible d'etre deforme
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FR3076924A3 (fr) 2018-01-16 2019-07-19 Franck Guigan Procede d’authentification d’une signature tridimensionnelle
DE102018106181A1 (de) * 2018-03-16 2019-09-19 Bundesdruckerei Gmbh Bildaufnahmevorrichtung und Verfahren zum Aufnehmen einer Bildaufnahme eines Dokuments und Verwendung
EP4022474A2 (fr) 2019-08-29 2022-07-06 PXL Vision AG Vérification d'identification à l'aide d'un dispositif mobile
CH716082A1 (de) * 2019-12-20 2020-10-15 Ti&M Products Ag Verfahren zur Benutzeridentifikation.
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EP4171051A1 (fr) * 2021-10-20 2023-04-26 FUJIFILM Business Innovation Corp. Dispositif, programme et procédé de collationnement

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