EP0585724B1 - Méthode et dispositif pour la reconnaissance d'images imprimées sur documents - Google Patents

Méthode et dispositif pour la reconnaissance d'images imprimées sur documents Download PDF

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Publication number
EP0585724B1
EP0585724B1 EP93113159A EP93113159A EP0585724B1 EP 0585724 B1 EP0585724 B1 EP 0585724B1 EP 93113159 A EP93113159 A EP 93113159A EP 93113159 A EP93113159 A EP 93113159A EP 0585724 B1 EP0585724 B1 EP 0585724B1
Authority
EP
European Patent Office
Prior art keywords
structural elements
regularities
tested
regularity
certain
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.)
Revoked
Application number
EP93113159A
Other languages
German (de)
English (en)
Other versions
EP0585724A3 (en
EP0585724A2 (fr
Inventor
Gerhard Dr. Stenzel
Wittich Dr. Kaule
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.)
Giesecke and Devrient GmbH
Original Assignee
GAO Gesellschaft fuer Automation und Organisation mbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6465991&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0585724(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by GAO Gesellschaft fuer Automation und Organisation mbH filed Critical GAO Gesellschaft fuer Automation und Organisation mbH
Publication of EP0585724A2 publication Critical patent/EP0585724A2/fr
Publication of EP0585724A3 publication Critical patent/EP0585724A3/de
Application granted granted Critical
Publication of EP0585724B1 publication Critical patent/EP0585724B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04—Preventing copies being made of an original
    • G03G21/046—Preventing copies being made of an original by discriminating a special original, e.g. a bank note
    • 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

  • the invention relates to a method for preventing the authorized duplication of securities or the like using Printed images are equipped that contain structural elements that one Class of securities are common and all of a certain have geometric regularity, and a device for Execution of the procedure.
  • Such a device describes, for example, the US-PS 4,723,149. in addition to the sensor devices necessary for the normal functioning this copying device has an additional magnetic Sensor based on the magnetic features present on the original proves.
  • a similar device that also aims to the banknote must be provided with special features from the IBM Technical Disclosure Bulletin, Vol. 18, No. 3 known.
  • the confidential document with printed at least one color in a narrow Spectral range has a strong absorption line.
  • Three detectors are arranged in the copier, one narrow spectral sensitivity in red, green or own blue.
  • the detectors measure in the respective spectral range amount of light reflected from the document. Because of the Absorption by the dye is a signal value of the detectors below the values of the other two, so it is a sign that a confidential document is being copied shall be. In this case, the copying process is also done canceled.
  • a method is known from EP-A-0 485 694 a series of measured values with corresponding reference values be compared.
  • the measured values relate to certain physical Properties such as the intensity of the reflected light.
  • EP-OS 0 342 060 strikes.
  • the image data of the original is digitized and buffered.
  • Dependent from a comparison with also stored in the copier The copying process is prevented or released for reference values.
  • the document to be protected is not how initially described, based on a defined physical property recognized, but based on the individual image content.
  • the object of the invention is based on this prior art in providing a method of recognizing value documents, which is simple Wise allows as many value documents as possible, independently from their individual graphic design, to recognize, as well as a device for performing the method specify.
  • the essential basic idea of the invention lies in Realization that the printed images of the value documents mostly contain individual structural elements for securities are characteristic in themselves. Based on this anyway existing or new securities to be designed structural elements to be provided is a general one Class assignment possible, d. H. already in existence such structural elements can be based on the presence of a Securities can be inferred without the printed image analyzed in whole or with a saved Print image is compared to identity. In the simplest Case these structural elements are in a certain minimal areal density present curved, colored Lines. Normally one evaluates those in the securities sector known, intertwined line structures, the so-called guilloches.
  • Structural elements must always be selected, one have certain laws and are representative stand for a larger number of securities or for a larger number of securities are characteristic.
  • the color copier is included an electronic unit, which with the help corresponding comparison programs enables a comparison between the currently scanned document and the stored regularity data. Find yourself on the template this defined law, so the copying process is interrupted or not at all initiated.
  • the inventive method has the advantage that for the recognition of documents of value a comprehensive, the Values common feature is used that results from the printed image itself and therefore also on a photograph is still there, but on the other hand the individual design of the documents to be protected not affected. Because the individual print image results from the color design and arrangement of the structural elements.
  • Another advantage is that only few reference values need to be saved and nevertheless recognized a variety of different value documents and can be protected against unauthorized copying.
  • the structural elements Guilloche. These loop-shaped Line patterns appear in delicate colors in large parts of the Banknotes of different currencies and their respective Denominations printed on. But also on most Securities are guilloches. Usually two Patterns of different colors are artfully interwoven. If the picture of such a banknote with the help of a color scanner is broken down into pixels, it is relative easy to identify the lines and their colors. For example, to identify the guilloches mean distance of the lines in one of the colors, the Ratio of the mean distances between the lines of the two Colors or the distribution function of the distance of the Lines as parameters or defined regularity to serve.
  • Document 1 can be a security, a banknote or represent the like. This document 1 introduces Print image on, at least in some areas from individual Structural elements exist that a defined Follow the law. Examples of such structural elements and their laws are different Position explained in more detail.
  • Document 1 is illuminated by two light sources 2.
  • the reflected light is registered by a detector 3 and fully or partially into a digital one Data record implemented, which is stored in the buffer 4 becomes.
  • the signal analyzer 5 processes this data known mathematical pattern recognition method under Taking into account those stored in the feature memory 6 Structural elements.
  • the result of this investigation is for example, a numerical value that indicates how often or with what density per unit area the given Structures are present in the print image of document 1.
  • This numerical value is given to a comparator 7 which determines whether the determined by the analyzer 5 Structure elements correspond to the values in the evaluation memory 8 are specified.
  • In the rating memory can for example tolerance ranges, lower or upper Limit values, predetermined values or the like are set will. If these requirements are met, how already explained, the further processing or further treatment of document 1 prevented.
  • Modules 5 - 9 form an electronic evaluation and control unit 10, which of course one much more compact structure than that for the sake of Clarity shown schematically in the figure can have.
  • the processing unit 10 can be built into any device in which it is necessary to submit documents recognize the printed images with characteristic structures exhibit.
  • preferred devices are Copy, print and banknote checkers.
  • the processing unit 10 becomes serial in the copier's data processing path. On This way it is ensured that all to be reproduced Data for compliance with the given Structural elements are checked.
  • the "Multiple Copy” mode can be used repeated reviews of the same template are avoided, if it is ensured that the original is replaced not during the creation of the multiple copies is possible or cannot lead to success. This is on the one hand, if the original artwork during the Copy process is firmly fixed or if after initiation of the multiple copies of the initially created (and on Reliability checked) data for all the same copies be used. In this way they are each second and subsequent duplicates in the copier own copy speed can be created. A delay the process of the admissibility check is omitted in these cases.
  • the unit 10 can also be used in printers can be used advantageously, especially with regard on developments in the field of multimedia systems. These systems will become increasingly so in the future enable the image of any recording medium, e.g. B. a photo camera, a video camera or television sets, to spend. It is therefore also on this Area important to duplicate value documents too prevent. Taking the printed image of a value document can hardly be prevented from printing on the other hand, can be avoided by the unit 10 according to the invention will. Before the printer converts the image data and outputs on a print medium, these are on the Presence of structural elements with a certain Legality checked and, as described in the introduction, treated.
  • the method according to the invention and the associated device have in all fields of application mentioned above the advantage of being simple and relatively quick a document can be recognized. There are none for this additional sensors necessary. This has beyond that the advantage that on those devices that a Processing unit 10 according to the invention, no special structural changes were made need to be, since the electronic processing unit 10 spatially as desired in the respective device can be placed.
  • guilloches An already very common one on valuable documents Structural elements are guilloches. Guilloches are delicate, according to certain geometrical laws Protection line works, processed in one or more colors and manufactured on special guilloche machines will. The guilloches can be used as positive or negative guilloches available. You are in high pressure or in Line gravure combined with high pressure processes.
  • this guilloche pattern for example the mean distance between the lines in the first Color, the characteristic line, the line structure (Line width), the area coverage or the flat arrangement, the line density, the number of entanglements and / or intersections of lines per unit area, the mean distance of the lines different Color, the ratio of the mean distances of the Lines of both colors or the distribution function (histogram), the contour sharpness in relation to the line width, the sharpness of the intertwining and crossing points used in relation to the line width etc.
  • the mean distance between the lines in the first Color for example the mean distance between the lines in the first Color, the characteristic line, the line structure (Line width), the area coverage or the flat arrangement, the line density, the number of entanglements and / or intersections of lines per unit area, the mean distance of the lines different Color, the ratio of the mean distances of the Lines of both colors or the distribution function (histogram), the contour sharpness in relation to the line width, the sharpness of the intertwining and crossing points used in relation to the line
  • the legality that can be evaluated in these cases can for example the number of elements per unit area, the mean distance of these elements or the distribution of the elements throughout the document.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Engineering & Computer Science (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Cleaning In Electrography (AREA)
  • Image Analysis (AREA)
  • Facsimiles In General (AREA)
  • Radar Systems Or Details Thereof (AREA)

Claims (13)

  1. Procédé pour empêcher la duplication non autorisée de papiers valeurs ou similaires, qui sont munis d'images imprimées qui contiennent des éléments de structure, qui sont communs à une classe de papiers valeurs et qui tous présentent une certaine conformité avec une loi géométrique les images imprimées étant explorées électroniquement en leur totalité ou en partie, leurs données étant stockées en tout ou en partie de façon intermédiaire pour ensuite être vérifiées au moyen de programmes prédéterminés de comparaison avec des données stockées en mémoire concernant la concordance à une loi, pour la présence des éléments de structure présentant les concordances avec une loi déterminée et qui sont introduites en fonction de la présence de ces dispositions spécifiques de concordance avec une loi.
  2. Procédé selon la revendication 1, dans lequel on recherche, dans les données stockées de façon intermédiaire, la présence d'éléments de structure sous forme de lignes créées avec des différences de couleur.
  3. Procédé selon la revendication 2, dans lequel pour les éléments de structure sous forme de lignes, il s'agit de structures guillochées, des réseaux de ligne ou de lignes qui courent parallèlement les unes aux autres.
  4. Procédé selon la revendication 2 ou 3, dans lequel pour la concordance avec une loi définie, on vérifie la fréquence des croisements des lignes, la fonction de distribution de la distance des lignes ou le rapport entre la séparation moyenne des lignes de deux couleurs.
  5. Procédé selon la revendication 1, dans lequel on vérifie, dans les données stockées de façon intermédiaire la présence de figures qui sont symétriques en rotation ou sous une forme symbolique présentant éventuellement des différences de couleur.
  6. Procédé selon la revendication 5, dans lequel on vérifie, en tant que concordance avec une loi déterminée, le nombre d'éléments de structure par unité de surface ou la distribution des éléments de structure sur tout le document.
  7. Procédé selon la revendication 1, dans lequel on vérifie la présence simultanée de plusieurs concordances avec une loi et la présence de plusieurs concordances avec une loi pour l'évaluation de l'image imprimée.
  8. Dispositif pour empêcher la duplication non autorisée de papiers valeurs on similaires, qui sont munis d'images imprimées qui contiennent des éléments de structure, qui sont communs à une classe de papiers valeurs et qui tous présentent une certaine conformité avec une loi géométrique, avec des moyens pour explorer les images imprimées à vérifier en leur totalité ou dans des zones partielles, avec des moyens pour le stockage intermédiaire des données ainsi captées, avec des moyens de traitement de signal pour la vérification des données stockées de façon intermédiaire à l'aide de programmes de comparaison prédéterminés avec des concordances avec une loi stockée en mémoire, pour la présence des éléments de structure présentant les concordances avec une loi prédéterminées et avec des moyens de commande, qui, en présence de ces concordances avec une loi introduisent des dispositions spécifiques.
  9. Dispositif selon la revendication 8, présentant une mémoire dans laquelle un certain nombre d'éléments de structure sont stockés et une mémoire supplémentaire dans laquelle les données d'évaluation, c'est-à-dire les concordances correspondantes sont stockées.
  10. Dispositif selon la revendication 8 ou 9, présentant une analyseur de signal qui, avec des procédés de reconnaissance de énormes connus, reconnaít les éléments de structure, et un comparateur qui compare la concordance avec une loi des éléments de structure stockés de façon intermédiaire avec des valeurs de référence prédéterminées, et ensuite en fonction du résultat de la comparaison, fournit un signal correspondant à un circuit de commande.
  11. Application d'un dispositif selon au moins l'une des revendications 8 à 10 dans un appareil de copie.
  12. Application d'un dispositif selon au moins l'une des revendications 8 à 10 dans un appareil de vérification de billets de banque.
  13. Application d'un dispositif selon au moins l'une des revendications 8 à 10 dans une imprimante.
EP93113159A 1992-08-20 1993-08-17 Méthode et dispositif pour la reconnaissance d'images imprimées sur documents Revoked EP0585724B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4227613A DE4227613A1 (de) 1992-08-20 1992-08-20 Verfahren und Vorrichtung zur Erkennung von Druckbildern auf Dokumenten
DE4227613 1992-08-20

Publications (3)

Publication Number Publication Date
EP0585724A2 EP0585724A2 (fr) 1994-03-09
EP0585724A3 EP0585724A3 (en) 1996-07-24
EP0585724B1 true EP0585724B1 (fr) 1999-11-24

Family

ID=6465991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93113159A Revoked EP0585724B1 (fr) 1992-08-20 1993-08-17 Méthode et dispositif pour la reconnaissance d'images imprimées sur documents

Country Status (10)

Country Link
US (1) US5483602A (fr)
EP (1) EP0585724B1 (fr)
JP (1) JP3689436B2 (fr)
AT (1) ATE187003T1 (fr)
DE (2) DE4227613A1 (fr)
DK (1) DK0585724T3 (fr)
ES (1) ES2138608T3 (fr)
GR (1) GR3032464T3 (fr)
PT (1) PT585724E (fr)
SG (1) SG65600A1 (fr)

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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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US7483175B2 (en) * 2005-09-16 2009-01-27 Pitney Bowes Inc. Method and system for printing secure value documents and non-secure documents utilizing the same printing device
TWI470561B (zh) 2005-12-19 2015-01-21 Internat Frontier Tech Lab Inc The card can be judged by the pictographic chip
US8527285B2 (en) * 2006-06-28 2013-09-03 Pitney Bowes Inc. Postage printing system for printing both postal and non-postal documents
US7787154B2 (en) * 2007-05-31 2010-08-31 Xerox Corporation Font printing system having embedded security information comprising variable data periodic line patterns
US8139270B2 (en) * 2007-05-31 2012-03-20 Xerox Corporation Variable data periodic line patterns for composing a font system
EP2189294A1 (fr) * 2008-11-21 2010-05-26 Gemalto SA Procédé pour élaborer une image guillochée, procédé pour vérifier l'authenticité et/ou imprimer ladite image sur un support et support associé
PL2951791T3 (pl) * 2013-02-04 2019-10-31 Kba Notasys Sa Uwierzytelnianie dokumentów zabezpieczonych i urządzenie przenośne do przeprowadzania uwierzytelniania
NL2011739C2 (en) * 2013-11-05 2015-05-07 Nl Bank Nv Banknote counterfeit classification.
ES2973322T3 (es) * 2019-11-26 2024-06-19 European Central Bank Método implementado en ordenador para protección contra copias, dispositivo de procesamiento de datos y producto de programa de ordenador
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Also Published As

Publication number Publication date
DK0585724T3 (da) 2000-04-17
US5483602A (en) 1996-01-09
GR3032464T3 (en) 2000-05-31
EP0585724A3 (en) 1996-07-24
DE59309880D1 (de) 1999-12-30
ES2138608T3 (es) 2000-01-16
JPH06318282A (ja) 1994-11-15
ATE187003T1 (de) 1999-12-15
SG65600A1 (en) 1999-06-22
EP0585724A2 (fr) 1994-03-09
JP3689436B2 (ja) 2005-08-31
DE4227613A1 (de) 1994-02-24
PT585724E (pt) 2000-04-28

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