WO2001060047A2 - 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
WO2001060047A2
WO2001060047A2 PCT/EP2001/000957 EP0100957W WO0160047A2 WO 2001060047 A2 WO2001060047 A2 WO 2001060047A2 EP 0100957 W EP0100957 W EP 0100957W WO 0160047 A2 WO0160047 A2 WO 0160047A2
Authority
WO
WIPO (PCT)
Prior art keywords
document
features
image
determined
positions
Prior art date
Application number
PCT/EP2001/000957
Other languages
German (de)
English (en)
Other versions
WO2001060047A3 (fr
Inventor
Robert Massen
Thomas Franz
Thomas Leitner
Hans-Peter Diehl
Rolf Weber
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
Priority to AU33719/01A priority Critical patent/AU3371901A/en
Priority to DE50113260T priority patent/DE50113260D1/de
Priority to EP01905705A priority patent/EP1195045B1/fr
Priority to DK01905705T priority patent/DK1195045T3/da
Publication of WO2001060047A2 publication Critical patent/WO2001060047A2/fr
Publication of WO2001060047A3 publication Critical patent/WO2001060047A3/fr
Priority to CY20081100167T priority patent/CY1107191T1/el

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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

  • Category A optical features invisible to the human eye under normal observation, which are recognizable visually or by machine under certain non-coherent lighting and recording conditions.
  • This category also includes introduced or printed dyes with a special reflection behavior, often in the near infrared wavelength range (abbreviated to NIR).
  • NIR near infrared wavelength range
  • the spectral distribution of the remitted infrared light contains a typical signature, which can be checked by spectrometric methods. This is known as machine recognition.
  • This category also includes the information hidden in images, the so-called steganography, which is introduced by means of certain modulation methods of the raster in rasterized image printing and can be extracted mechanically with the aid of image processing methods.
  • Category B optical characteristics visible to the human eye under normal observation, which change under a certain, non-coherent lighting.
  • Category C optical characteristics visible to the human eye under normal observation, which under certain, coherent
  • Lighting arrangements produce certain diffraction patterns due to light diffraction.
  • diffraction gratings applied to clear or metallized foils, which produce special diffraction patterns with a certain laser illumination, which can be checked with the aid of photodetectors or cameras.
  • Category D optical features visible to the human eye under normal observation, which represent an information-bearing, machine-readable code.
  • category D only the characteristics of category D are currently automatically evaluated with the aid of readers.
  • These devices contain one or more cameras and one or more spectrally different illuminations and are able to be machine-readable
  • authentication The verification of the document itself is called "authentication”.
  • verification 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 known or is only approximately known.
  • This object is achieved by the technical teaching of claim 1.
  • the document in its entirety or in parts, is illuminated in a first step with illuminants, the spectral and geometric distribution, polarization, coherence and temporal course of the optical properties of the illuminants are selected so that an image can be detected by imaging sensors, in which the Positions of the security features due to differences in brightness, contrast, color, pattern relative to the rest of the document background are automatically recognizable with image processing methods, that in a second step the corresponding features are only checked in the image areas which match those found in the first step Correspond to 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 the methods for image processing and / or spectrometry are used the examination of the
  • the method according to the invention allows the position of the security features to be determined, both relative to the coordinate system of the scanned document and, of course, to the coordinate system of the scanner itself.
  • the scanner By detecting the edge of the sheet against the dark one In the background of the cover flap, the scanner "knows" how the document is aligned with its own coordinate system.
  • this position information is first found relative to the coordinate system of the scanner when it is scanned for the first time, regardless of the exact orientation of the document on the scanner's scanning window.
  • the corresponding illuminations and / or line sensors of the scanner can be moved with high precision at these points in the document 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 created by eg the upper left corner of the sheet is defined as the XONO coordinate origin of the document.
  • the translation rotation matrix between the scanner coordinate system and the document coordinate system is produced by recognizing at least two corners in the sampling window.
  • the invention consists, among other things, of using suitable lighting methods to find the position of the authenticity features relative to the document and / or relative to the scanner, with these Types of lighting can be different from those used for checking the authenticity features.
  • Part of the inventive concept is also the storage and archiving of all captured, pictorial information of the saved document in a database simultaneously with the review of the document.
  • Fig. 1 shows the schematic structure of a personal document with the security features ICAO line with NIR underline, barcode, portrait print with information hidden in the image and a diffraction feature applied to a metallized film
  • FIG. 3 schematically shows a typical proposed solution, in which the entire document is scanned with a high-resolution line scan scanner under different illuminations that differ in spectral, geometric and temporal terms
  • the idea of the invention is explained by way of example, but not by way of limitation on the basis of a personal document secured by several features at the same time.
  • this document 1 is to be secured by the following features to be mechanically positioned and checked:
  • a diffractive element 4 which is applied in the center of a star-shaped metallized film and which determined with coherent illumination at a specific wavelength
  • the text field 6 contains no security features and no machine-readable information. Nevertheless, it must be recognized mechanically 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 be known or only be known with uncertainty when scanning through the arrangement according to the invention, so that according to the invention these positions of these features with respect to the coordinate system must be determined in a first step. 2 shows an example of an arrangement for carrying out the “positioning” method step.
  • Document 1 is placed on device 12 with the side to be evaluated.
  • the side is scanned line by line through the viewing window 13 with the motor-driven sensor head 15, which is moved linearly along the bearing 14.
  • the document 1 is alternately illuminated with a wavelength in the near infrared and with a wavelength in the visible light during the scanning by the diffuse illumination 16. This can be by time switching according to spectrally selected light emitting diodes (LED's) happen. If the switchover takes place synchronously with the line frequency, two images A and B are interleaved in the image memory of the computing unit 21, A being intended to represent the one illuminated in the NIR range and B the one shown in the visible illuminated image.
  • LED's light emitting diodes
  • the automatic positioning of the colored portrait picture 5 can e.g. can be recognized in that the color pigments of the portrait 5 change their reflection behavior between NIR illumination and illumination in the visible range, while the reflection behavior of the background paper remains similar.
  • FIG. 3 This property is illustrated in FIG. 3 by a weaker contrast between portrait and background in image A compared to the contrast in image B. This local difference allows the person skilled in the art of image processing to determine the position of the portrait with respect to the document coordinate system.
  • the position of the metallized film which carries the diffractive element in the center can be recognized. While the contrast between the metallized film and the background paper appears relatively weak under the diffuse illumination 16 and this also relatively independently of the illuminating wavelength, the contrast difference between the specularly reflecting metal film and the paper of the background becomes very large due to the oblique illumination.
  • the obliquely incident directional illumination reflects past the entrance pupil of the imaging lens 18. This makes the slide appear darker than the background. This is shown in Fig. 3 in picture C.
  • this contrast difference can also be achieved by a so-called bright field illumination, in which the illumination is arranged in such a way that it reflects directly into the pupil of the imaging lens through the reflecting film and thus brighter than the diffusely reflecting one Background appears.
  • the obliquely incident directional illumination is selected at least partially coherently at the same time, it is achieved at the same time that the actual security feature in the center of the metallized star, namely the diffractive element with one of the
  • Diffraction orders reflect back into the pupil of the imaging optics and thus appear bright.
  • 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 individual images associated with the respective types of lighting can be recorded with reduced resolution become.
  • this can be done in that the imaging line sensor works with a coarser step size during this positioning step.
  • Another idea of the invention is to switch the individual illuminations in synchronism with the line cycle of the imaging line sensor and thus to obtain a series of interlaced images of lower resolution in one scanning process, from which, due to the systematic contrast and pattern differences, the positions of the individual features using methods of pattern recognition and Image processing can be determined.
  • both the single-path and the multipath method illuminate the entire document with multispectral radiation, so that the authenticity features correspondingly distributed on the document react with different spectral responses and are also detected with spectrally differently recording sensors ,
  • clocked light-emitting diodes are used as radiation sources because only a relatively low resolution is required.
  • a line sensor which contains a line of image-recording sensors, which line sensor is now moved along the document.
  • Such a silicon sensor would z. B. have a spectral sensitivity from visible light to the NIR spectrum.
  • the light-emitting diodes which emit visible light and the light-emitting diodes which emit light in the NIR spectral range are driven alternately for each line. This creates a partially interlocked overall image in the image memory that receives the signal.
  • B. consists of 1000 lines. Of these, 500 lines are supplied with signals which correspond to the spectral response in visible light, while 500 lines are supplied with signals which correspond to the spectral response of the authenticity features in the NIR range.
  • a 1000-line image array which contains 500 lines of one image and 500 lines of the other image, is now determined by determining the difference between the two images read out, where the authenticity features are.
  • the portrait image In relation to portrait image 5, the portrait image would be easily readable in the visible area, while in the NIR area the portrait is difficult to read out or disappears completely, so that the determination of this difference image clearly states that there is a visible light at this location readable portrait picture is located.
  • this also applies to the location of the other elements, where z. B. with respect to the machine-readable text 2, the line 11 disappears in the NIR area, while it is present in the visible area, so that the location of this machine-readable text 2 can also be determined easily.
  • the invention is of course not only limited to the determination of a difference image from two different spectral wavelengths, but - as stated previously in the invention - the direction of the incident light and the resulting spectral response is a measure of the location and the type of the used authenticity features.
  • the current claim 3 also states that the geometric distribution of the lighting is used to find the authenticity features.
  • geometric distribution z. B. understood the direction of the incident light, but also the geometric distribution, for. B. in the form of a lattice structure or a particularly distributed, geometric structure, such as. B. concentric rings or other geometrical arrangements of the lighting sources.
  • the degree of polarization of the illumination source can also be used in order to obtain a specific readout of authenticity features.
  • the invention is also not limited to the use of coherent light, but non-coherent or medium-coherent light can also be used.
  • temporal activity is understood to mean that the authenticity feature is illuminated with a certain pulse and the impulse response and its decay is examined in a certain time window, so that the temporal activity of the impulse response can also be used to read out the authenticity feature. All of the measures mentioned above are therefore initially used to determine the location of the authenticity features which are distributed on the document.
  • the second scan can of course be limited to certain areas of the document to save time. However, it is important here that the second scanning process can be carried out at a relatively high speed, because high-resolution scanning would only have to be carried out at certain points where authenticity features were recognized.
  • the location of the authenticity features is determined from the signal response, then the corresponding signal received can now be examined more precisely for authenticity features at this location by software.
  • a digital image is thus generated in a multi-line array from the entire document and the authenticity features contained on it.
  • the authenticity check of each individual feature now only takes place exactly at the location where the authenticity feature was also previously determined. Above all, this saves computing time and provides a significantly higher production output for the device according to the invention.
  • Combination can be used as described in the general part (and in particular also in claim 3). This applies in particular to the type and shape of the illumination, to the spectral distribution of the illumination source and the like. And always focused on the recognized location of the authenticity feature and only on this location.
  • This type of evaluation of authenticity features is of great importance for authenticity features that are constructed on the basis of diffraction structures. It is a matter of very precise positioning of the radiation source in relation to the authenticity feature, and this is where the advantages of the invention arise.
  • the diffractive features are checked in that a coherent light source such as e.g. a laser diode is directed to the position which was determined in the first step.
  • a coherent light source such as e.g. a laser diode
  • 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 pattern is e.g. converted into a real image of punctiform structures via a focusing screen and captured by an image sensor.
  • the feature can be checked by checking the position and arrangement as well as the radiometric properties such as brightness ratios of these structures in the image captured 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 the suspected positions of the feature in a search grid and using an image sensor to obtain an image of this local region. If the diffractive element is hit, significant, a priori from the definition of the diffractive element occur in known structures, so that the positioning has taken place when these expected structures occur
  • the definitions of the diffractive element with regard to its position, the type of diffraction structures generated, the information or decoding instructions contained therein are stored in other machine-readable features of the same document, for example cryptographically encoded in the 2-dimensional bar code or in the steganographically hidden information in the portrait image ,
  • This procedure has the big one Advantage that no fixed standards for the specific document have to be made for such standards. It allows individual diffractive elements to be created for each document and the information required for checking to be hidden in the same document but in one or more other security features.
  • this method of the individual security feature applies not only to the diffractive security features, but also fundamentally to all others.
  • the shape or type of UV-visible features can be hidden in the portrait image.
  • the test specification for the machine check of the UV feature or features is available at the same time, without the need to query a database, a standard or any other information source stored outside the actual document itself.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (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)
  • Image Processing (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

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 connues que de manière approximative, voire pas du tout. Selon ledit procédé, dans une première phase, le document est éclairé dans sa totalité ou dans certaines parties à l'aide de moyens d'éclairage dont la répartition spectrale et géométrique, le degré et/ou la direction de polarisation, la cohérence et l'activité temporelle sont ainsi sélectionnés qu'ils permettent d'obtenir une ou plusieurs images, prises par un ou plusieurs capteurs générateurs d'images, des surfaces éclairées des documents, la position des caractéristiques de sécurité dans ces images constituant une différence par rapport au fond du document. Ces positions sont déterminées automatiquement par rapport au système de coordonnées du document à l'aide de procédés d'analyse d'images. Dans une seconde phase, la vérification des caractéristiques correspondantes n'est effectuée que dans les parties de l'image qui correspondent aux positions trouvées dans la première phase, et à cet effet, les zones correspondantes de l'image sont éclairées de manière telle que les caractéristiques correspondantes des images produisent des signatures spectrales et/ou d'autres motifs optiques desquels peuvent être dérivées les informations nécessaires pour la vérification des caractéristiques, à l'aide de procédés de traitement d'images et de spectrométrie.
PCT/EP2001/000957 2000-02-10 2001-01-30 Authentification automatique de documents proteges par des caracteristiques de securite WO2001060047A2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU33719/01A AU3371901A (en) 2000-02-10 2001-01-30 Automatic authentification of documents protected with security features
DE50113260T DE50113260D1 (de) 2000-02-10 2001-01-30 Automatische authentifikation von mit sicherheitsmerkmalen geschützten dokumenten
EP01905705A EP1195045B1 (fr) 2000-02-10 2001-01-30 Authentification automatique de documents proteges par des caracteristiques de securite
DK01905705T DK1195045T3 (da) 2000-02-10 2001-01-30 Automatisk autentifikation af dokumenter, der er beskyttet med sikkerhedskendetegn
CY20081100167T CY1107191T1 (el) 2000-02-10 2008-02-13 Αυτοματη πιστοποιηση της αυθεντικοτητας εγγραφων τα οποια προστατευονται με χαρακτηριστικα γνωρισματα ασφαλειας

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10005835.3 2000-02-10
DE10005835A DE10005835A1 (de) 2000-02-10 2000-02-10 Automatische Authentifikation von mit Sicherheitsmerkmalen geschützten Dokumenten

Publications (2)

Publication Number Publication Date
WO2001060047A2 true WO2001060047A2 (fr) 2001-08-16
WO2001060047A3 WO2001060047A3 (fr) 2002-01-17

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Application Number Title Priority Date Filing Date
PCT/EP2001/000957 WO2001060047A2 (fr) 2000-02-10 2001-01-30 Authentification automatique de documents proteges par des caracteristiques de securite

Country Status (9)

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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)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2016166490A1 (fr) * 2015-04-17 2016-10-20 Oberthur Technologies Procédé de vérification d'un dispositif de sécurité 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

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DE10231634A1 (de) * 2002-07-12 2004-01-22 Datasound Gmbh Verfahren und Vorrichtung zum Auslesen codierter Informationen
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
DE102009012758A1 (de) * 2009-03-12 2010-09-16 Hella Kgaa Hueck & Co. Vorrichtung und Verfahren zur Detektion mindestens eines Objektes
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***及读取方法
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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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016166490A1 (fr) * 2015-04-17 2016-10-20 Oberthur Technologies Procédé de vérification d'un dispositif de sécurité comportant une signature
FR3035253A1 (fr) * 2015-04-17 2016-10-21 Oberthur Technologies Procede de verification d'un dispositif de securite comportant une signature
KR20170137193A (ko) * 2015-04-17 2017-12-12 오베르뛰르 테크놀로지스 서명을 포함하는 보안 장치를 검증하는 방법
CN107667392A (zh) * 2015-04-17 2018-02-06 欧贝特科技公司 用于验证包括签名的安全装置的方法
US20180122173A1 (en) * 2015-04-17 2018-05-03 Oberthur Technologies Method for verifying a security device comprising a signature
US10445968B2 (en) 2015-04-17 2019-10-15 Idemia France Method for verifying a security device comprising a signature
CN107667392B (zh) * 2015-04-17 2020-04-17 欧贝特科技公司 用于验证包括签名的安全装置的方法
AU2016250128B2 (en) * 2015-04-17 2021-02-04 Oberthur Technologies Method for verifying a security device comprising a signature
KR102500424B1 (ko) * 2015-04-17 2023-02-16 아이데미아 프랑스 서명을 포함하는 보안 장치를 검증하는 방법
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

Also Published As

Publication number Publication date
CY1107191T1 (el) 2012-01-25
DK1195045T3 (da) 2008-04-21
EP1195045B1 (fr) 2007-11-14
AU3371901A (en) 2001-08-20
ES2296727T3 (es) 2008-05-01
PT1195045E (pt) 2008-02-07
EP1195045A2 (fr) 2002-04-10
ATE378778T1 (de) 2007-11-15
DE10005835A1 (de) 2001-08-16
DE50113260D1 (de) 2007-12-27
WO2001060047A3 (fr) 2002-01-17

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