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EP1195045B1 - Authentification automatique de documents proteges par des caracteristiques de securite - Google Patents

Authentification automatique de documents proteges par des caracteristiques de securite Download PDF

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Publication number
EP1195045B1
EP1195045B1 EP01905705A EP01905705A EP1195045B1 EP 1195045 B1 EP1195045 B1 EP 1195045B1 EP 01905705 A EP01905705 A EP 01905705A EP 01905705 A EP01905705 A EP 01905705A EP 1195045 B1 EP1195045 B1 EP 1195045B1
Authority
EP
European Patent Office
Prior art keywords
document
features
image
security features
security
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.)
Expired - Lifetime
Application number
EP01905705A
Other languages
German (de)
English (en)
Other versions
EP1195045A2 (fr
Inventor
Robert Massen
Thomas Franz
Thomas Leitner
Hans-Peter Diehl
Rolf Weber
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.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei GmbH
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 Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP1195045A2 publication Critical patent/EP1195045A2/fr
Application granted granted Critical
Publication of EP1195045B1 publication Critical patent/EP1195045B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G07D7/20—Testing patterns thereon
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/1205—Testing spectral properties
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details

Definitions

  • NIR near infrared
  • category D According to the state of the art, only the features of category D are currently evaluated automatically with the aid of readers.
  • These devices contain one or more cameras as well as one or more spectrally different illuminations and are able to automatically decode machine-readable documents such as the so-called lCAO line for personal documents, applied 1D or 2D barcodes.
  • the positions of these codes relative to a document-oriented coordinate system are usually defined by international standards.
  • the documents must be placed in a specific position on the viewing window of these devices in order to work correctly.
  • the verification of the document itself is called “authentication”.
  • the question of whether the document shown, e.g. An identity card also belongs to the carrier is called “Verification”.
  • the object of the invention is a method and an arrangement for the fast and automatic authentication of documents secured with numerous optical features, in which the position of the features relative to the coordinate system of the document is not or only approximately known.
  • the document is illuminated in its entirety or in some areas in a first step with lighting means whose spectral and geometric distribution, polarization, coherence and time course of the optical properties of the illumination means are selected so that an imageable by imaging sensors image arises in which the Positions of the security features due to brightness, contrast, color, pattern differences relative to the rest of the document background are automatically recognizable with methods of image processing, that in a second step, the examination of the corresponding features is performed only in the image areas, which found in the first step Corresponding positions and for this purpose the corresponding image areas are illuminated in such a way that the corresponding features generate images and / or spectral signatures, from which with methods of image processing and / or spectrometry that for d ie checking the characteristics required information can be derived.
  • the inventive method allows the determination of the position of the security features, both relative to the coordinate system of the scanned document, and of course to the coordinate system of the scanner itself. By detecting the sheet edge against the dark Background of the cover, the scanner "knows" how the document is aligned to its own coordinate system.
  • This position information is first found on the first scan relative to the coordinate system of the scanner, regardless of the exact orientation of the document on the scanning window of the scanner. With this information, the corresponding illuminations and / or line sensors of the scanner can be moved to these points of the document with high precision and the actual examination of the authenticity features can be carried out with high precision.
  • a transformation between the scanner coordinate system and the coordinate system of the document itself is established by eg
  • the top left corner of the sheet is defined as the X0, Y0 origin of the document.
  • the invention consists of finding, with suitable illumination methods, the position of the authenticity features relative to the document and / or relative to the scanner, these being Types of illumination may be different from those used in testing the authenticity features.
  • Part of the concept of the invention is also the storage and archiving of all captured pictorial information of the secured document in a database simultaneously with the review of the document.
  • the text field 6 contains no security features and no machine-readable information. However, it still has to be recognized by machine as a field that is not to be evaluated.
  • the layout of the document can be described by the position of these individual features with respect to an x, y coordinate system aligned at the edge of the document. These positions should not or only insecure be known when scanning by the arrangement according to the invention, so that according to the invention in a first step, these positions of these features must be determined with respect to the coordinate system.
  • FIG. 2 shows by way of example an arrangement for carrying out the method step "positioning".
  • the document 1 is placed on the device 12 with the page to be evaluated. Through the viewing window 13, the page is optically scanned line by line with the motor-driven sensor head 15, which is linearly moved along the storage 14-.
  • the positioning step does not require the high image resolution, which requires the actual machine evaluation of the text field, the 2D code, the information hidden in the portrait, and the diffraction patterns, the recording of the individual images associated with the respective illumination types can be recorded with reduced resolution become. This can technically be done by the imaging line sensor working at a coarser pitch during this positioning step.
  • Another idea of the invention is to switch the individual illuminations in synchronism with the line clock of the imaging line sensor and thus to obtain a series of interlaced lower resolution images in a scan, from which due to the systematic contrast and pattern differences, the positions of the individual features using methods of pattern recognition and Image processing are determined.
  • clocked light emitting diodes are used as radiation sources because only a relatively low resolution is required.
  • a line sensor which includes a row of image sensing sensors, which line sensor is now moved along the document.
  • Such a silicon sensor would be a z. B. have a spectral sensitivity of visible light to the NIR spectrum.
  • the LEDs are then alternately driven per line, which emit visible light and alternately the LEDs, which emit light in the NIR spectral range.
  • This process is carried out mainly in the single path method, because this is particularly fast and provides a relatively low resolution.
  • the Portrait 5 is very easy to read.
  • the portrait image would be easily readable, while in the NIR region the portrait is only badly readable or completely disappears, so that the determination of this difference image clearly establishes that one is in visible light at this location readable portrait image is located.
  • the invention is not limited to the determination of a differential image of two different spectral wavelengths, but it is - as previously stated in the invention - even the direction of the incident light and the resulting spectral response is a measure of the location and type of used authenticity features.
  • geometric distribution of the illumination is used to find the authenticity features.
  • geometric distribution is z. B. understood, the direction of the incident light, but also the geometric distribution, z. B. in the form of a lattice structure or a particularly distributed, geometric structure such. As concentric rings or other geometric arrangements of the illumination sources.
  • the degree of polarization of the illumination source can be used to obtain a particular readout of authentication features.
  • the invention is not limited to the use of coherent light, but non-coherent or medium-coherent light may be used.
  • temporal activity is understood to mean that the authenticity feature is illuminated with a specific pulse and the impulse response and its decay are examined in a specific time window, so that the temporal activity of the impulse response can also be used to read the authenticity feature.
  • - in accordance with the above description - first scans the entire document with a lower resolution and determines the location of the authenticity features. This has been explained in detail above.
  • the second scan can be limited to specific areas of the document to save time. However, it is important that the second scan can be performed at a relatively high speed, because only at certain points where authenticity features were detected, would have to be scanned with high resolution.
  • the location of the authenticity features is determined from the signal response, then at this location, the correspondingly obtained signal can be examined more accurately for authenticity features by software.
  • a further embodiment according to the invention is that all the spectrally different illuminations are switched on simultaneously and the corresponding images are simultaneously imaged on different image sensors in the beam path of the imaging optics by one or more wavelength-dependent beam splitters.
  • the diffractive features are checked by using a coherent light source, e.g. a laser diode is directed to the position, which were determined in the first step.
  • a coherent light source e.g. a laser diode is directed to the position, which were determined in the first step.
  • This can be done, for example, by mechanically moving a laser diode so that its light beam is directed onto the diffractive element directly or via optical intermediate elements such as mirrors, prisms, beam splitters, etc.
  • the resulting diffraction image is e.g. converted via a ground glass into a real image of punctiform structures and detected by an image sensor.
  • the examination of the feature can be done by checking the position and arrangement and the radiometric properties such as brightness ratios of these structures in the image detected by the image sensor 20 with the aid of a computing unit 21.
  • the position of a diffractive feature can also be determined by locally illuminating the document in a search grid with a coherent illumination source in the presumed positions of the feature and obtaining an image of this local region with the aid of an image sensor. If the diffractive element is hit, significant, a priori, definitions of the diffractive element appear in known structures so that the positioning has occurred when these expected structures occur
  • the definitions of the diffractive element with respect to its position, the type of diffraction structures generated, the information or decoding rule contained therein are stored according to the invention in other machine-readable features of the same document, eg cryptographically encoded in 2-dimensional barcode or in the steganographically hidden information in the portrait image ,
  • This procedure has the big one
  • the advantage that such standards do not need to have fixed standards for the specific document. It allows you to create individual diffractive elements for each document and to hide the information required for verification in the same document but in one or more other security features.
  • This method of the individual security feature whose test specification is encoded in one or more other features of the same document, according to the invention not only applies to the diffractive security features, but also fundamental for all others.
  • the shape or type of UV-visible features can be hidden in the portrait image.
  • the test specification for the automatic over-checking of the UV feature (s) is ready at the same time, without having to ask for information in a database, a standard or another source of information stored outside the actual document itself.

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  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Facsimile Transmission Control (AREA)
  • Cleaning In Electrography (AREA)
  • Collating Specific Patterns (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Credit Cards Or The Like (AREA)
  • Image Processing (AREA)
  • Editing Of Facsimile Originals (AREA)

Claims (11)

  1. Procédé d'authentification automatique et rapide de documents protégés par des caractéristiques optiques, dans lesquels les positions desdites caractéristiques par rapport au système de coordonnées du document et/ou du dispositif automatique de vérification ne sont pas connues ou ne sont connues que de manière approximative, comprenant les étapes suivantes :
    1) A la première étape du procédé, le document est analysé afin de détecter la présence de caractéristiques de sécurité au moyen d'une basse résolution de l'unité de reconnaissance ;
    2) A la deuxième étape du procédé, le lieu de chaque caractéristique de sécurité est déterminé sur le document au moyen également d'une basse résolution de l'unité de reconnaissance ;
    3) A la troisième étape du procédé, chaque lieu ainsi détecté des caractéristiques de sécurité est analysé quant à son authenticité au moyen d'une haute résolution,
    selon lequel
    à la première étape du procédé, le document est éclairé au moyen d'une longueur d'onde infrarouge rapprochée et d'une longueur d'onde dans une lumière visible et est reproduit sur un capteur d'images,
    et à la deuxième étape du procédé, les positions desdites caractéristiques de sécurité sont identifiées en raison des différences de luminosité, contraste ou couleur des images.
  2. Procédé d'authentification automatique et rapide de documents protégés par des caractéristiques optiques, dans lesquels les positions desdites caractéristiques par rapport au système de coordonnées du document et/ou du dispositif automatique de vérification ne sont pas connues ou ne sont connues que de manière approximative, comprenant les étapes suivantes :
    1) A la première étape du procédé, le document est scanné au moyen de la plus haute résolution nécessaire à la reconnaissance des caractéristiques d'authenticité et le lieu des caractéristiques d'authenticité est reconnu immédiatement à partir de l'image scannée.
    2) A une deuxième étape du procédé, la réponse du signal ainsi obtenue au lieu des caractéristiques de sécurité détectées n'est étudiée au moyen d'une analyse par logiciel de la réponse du signal qu'audit lieu avec une haute précision,
    selon lequel
    à la première étape du procédé, le document est éclairé au moyen d'une longueur d'onde infrarouge rapprochée et d'une longueur d'onde dans une lumière visible et est reproduit sur un capteur d'images et les positions desdites caractéristiques de sécurité sont identifiées en raison des différences de luminosité, contraste ou couleur des images.
  3. Procédé selon la revendication 1 ou 2, selon lequel la position d'une caractéristique diffractive (4) est déterminée par le fait que dans un quadrillage de recherche une source de lumière cohérente éclaire le document localement dans les positions supposées de ladite caractéristique et une image de cet espace local est obtenue à l'aide d'un capteur d'images et que cette position varie jusqu'à ce que les structures de l'image attendues et a priori connues par la définition de l'élément diffractif apparaissent.
  4. Procédé selon l'une des revendications 1 à 3, selon lequel les éclairages se connectent tour à tour de manière synchrone au changement de ligne d'un capteur enregistreur d'images (20) et ainsi une disposition imbriquée d'images se forme correspondant respectivement ligne par ligne à un des éclairages nécessaires à la reconnaissance de la position des caractéristiques de sécurité.
  5. Procédé selon l'une des revendications 1 à 3, selon lequel plusieurs parmi les sources d'éclairage nécessaires (16, 17) sont actives simultanément et l'image correspondant à chaque source d'éclairage de la surface du document est reproduite par un répartiteur de rayons sur un propre capteur d'images.
  6. Procédé selon l'une des revendications 1 à 5, selon lequel le type de la caractéristique de sécurité présente est déterminé par les propriétés de la position évaluée desdites caractéristiques de sécurité.
  7. Procédé selon l'une des revendications 1 à 6, selon lequel les informations et définitions nécessaires au positionnement et à la vérification d'une caractéristique de sécurité sont stockées dans une ou plusieurs autres caractéristiques dudit document mécaniquement lisibles.
  8. Procédé selon la revendication 7, selon lequel les définitions d'une caractéristique de sécurité définie sont établies individuellement pour chaque document (1) et la partie des définitions qui est nécessaire au positionnement et à la vérification est codée dans une ou dans plusieurs autres caractéristiques dudit document mécaniquement lisibles.
  9. Procédé selon l'une des revendications 1 à 8, selon lequel les informations imagées survenues lors de l'exploitation automatique du document et autres informations sont enregistrées dans une base de données de documents, à partir de laquelle d'autres propriétés du document au-delà de l'exactitude des caractéristiques de sécurité et de l'information mécaniquement lisible peuvent être déterminées à n'importe quel moment.
  10. Disposition pour la réalisation du procédé selon l'une des revendications 1 à 9, dans laquelle le document à vérifier est balayé au moyen d'un réseau optique de différentes sources d'éclairage et d'un ou plusieurs capteurs enregistreurs d'images du document et les images attribuées aux sources d'éclairage respectives et générées par ledit ou lesdits capteurs d'images sont converties en signaux numériques électriques et enregistrées et exploitées dans une unité de compte, selon laquelle une source de lumière cohérente formée en tant que diode laser est dirigée sur la position déterminée à la première étape du procédé afin de contrôler les éléments diffractifs (4) et la diode laser est déplacée de telle sorte que le rayon de lumière est dirigé sur l'élément diffractif (4) directement ou au moyen d'éléments intermédiaires optiques tels que des miroirs, prismes et répartiteurs de rayons et la figure de diffraction qui en résulte est convertie au moyen d'un verre dépoli en une image réelle et enregistrée par un capteur d'images.
  11. Disposition selon la revendication 10, selon laquelle tous les éclairages différents au niveau spectral sont allumés simultanément et, dans le faisceau de l'optique reproduite, les images correspondantes sont reproduites simultanément sur différents capteurs d'images au moyen d'un ou plusieurs répartiteurs de rayons dépendant de leur longueur d'onde.
EP01905705A 2000-02-10 2001-01-30 Authentification automatique de documents proteges par des caracteristiques de securite Expired - Lifetime EP1195045B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10005835 2000-02-10
DE10005835A DE10005835A1 (de) 2000-02-10 2000-02-10 Automatische Authentifikation von mit Sicherheitsmerkmalen geschützten Dokumenten
PCT/EP2001/000957 WO2001060047A2 (fr) 2000-02-10 2001-01-30 Authentification automatique de documents proteges par des caracteristiques de securite

Publications (2)

Publication Number Publication Date
EP1195045A2 EP1195045A2 (fr) 2002-04-10
EP1195045B1 true EP1195045B1 (fr) 2007-11-14

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EP01905705A Expired - Lifetime EP1195045B1 (fr) 2000-02-10 2001-01-30 Authentification automatique de documents proteges par des caracteristiques de securite

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EP (1) EP1195045B1 (fr)
AT (1) ATE378778T1 (fr)
AU (1) AU3371901A (fr)
CY (1) CY1107191T1 (fr)
DE (2) DE10005835A1 (fr)
DK (1) DK1195045T3 (fr)
ES (1) ES2296727T3 (fr)
PT (1) PT1195045E (fr)
WO (1) WO2001060047A2 (fr)

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CN110830670A (zh) * 2018-08-10 2020-02-21 株式会社理光 读取装置、图像形成装置、真伪判定系统及读取方法

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FR2843815A1 (fr) * 2002-08-23 2004-02-27 Jacques Pitoux Dispositif de tracabilite des billets de banque ou monnaie fiduciaire, permettant instantanement de les identifier et de les rendre inutilisable en cas de vol, quelque soit leur provenances et le lieu geographique d'utilisation
FR2860325B1 (fr) * 2003-09-29 2006-01-13 Arjo Wiggins Secutity Sas Feuille authentifiable par spectroscopie proche infrarouge et methode d'authentification
DE102004042024A1 (de) * 2004-08-27 2006-03-09 Smiths Heimann Biometrics Gmbh Verfahren und Anordnungen zur Bildaufnahme für die Datenerfassung und Hochsicherheitsprüfung von Dokumenten
DE102005041603A1 (de) 2005-09-01 2007-03-15 Siemens Ag Verfahren zur automatischen Erkennung eines Objektes in einem Bild
US7441704B2 (en) 2006-03-03 2008-10-28 Ncr Corporation System and method for identifying a spatial code
WO2008113962A1 (fr) * 2007-03-20 2008-09-25 Prime Technology Llc Système et procédé d'identification d'un code spatial
DE102009012758B4 (de) * 2009-03-12 2025-12-11 Cariad Se Vorrichtung und Verfahren zur Detektion mindestens eines Objektes
FR3035253B1 (fr) * 2015-04-17 2020-12-04 Oberthur Technologies Procede de verification d'un dispositif de securite comportant une signature
AT518802A1 (de) * 2016-07-05 2018-01-15 Ait Austrian Inst Tech Gmbh Verfahren zur Ermittlung der Relativposition eines UV-lumineszierenden Merkmales auf einem nicht UV-lumineszierenden Träger
DE102019212369A1 (de) * 2019-08-19 2021-01-21 Zf Friedrichshafen Ag Verifikationsverfahren für Sensordaten
DE102020114980B4 (de) * 2020-06-05 2021-12-30 Mühlbauer Gmbh & Co. Kg Vorrichtung und system zur inspektion zumindest eines diffraktiven optischen elements eines dokuments

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DE69033327T2 (de) * 1989-02-10 2000-04-13 Canon Kk Gerät zum Lesen oder Verarbeiten eines Bildes
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US6449377B1 (en) * 1995-05-08 2002-09-10 Digimarc Corporation Methods and systems for watermark processing of line art images
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EP0675631A2 (fr) * 1994-03-29 1995-10-04 Sharp Kabushiki Kaisha Dispositif d'anti-falsification pour utilisation dans un appareil de traitement d'image

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110830670A (zh) * 2018-08-10 2020-02-21 株式会社理光 读取装置、图像形成装置、真伪判定系统及读取方法

Also Published As

Publication number Publication date
WO2001060047A2 (fr) 2001-08-16
DE10005835A1 (de) 2001-08-16
CY1107191T1 (el) 2012-01-25
DK1195045T3 (da) 2008-04-21
WO2001060047A3 (fr) 2002-01-17
ATE378778T1 (de) 2007-11-15
ES2296727T3 (es) 2008-05-01
EP1195045A2 (fr) 2002-04-10
AU3371901A (en) 2001-08-20
PT1195045E (pt) 2008-02-07
DE50113260D1 (de) 2007-12-27

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