CA2226321A1 - Authentificateur d'images optiques - Google Patents

Authentificateur d'images optiques Download PDF

Info

Publication number
CA2226321A1
CA2226321A1 CA002226321A CA2226321A CA2226321A1 CA 2226321 A1 CA2226321 A1 CA 2226321A1 CA 002226321 A CA002226321 A CA 002226321A CA 2226321 A CA2226321 A CA 2226321A CA 2226321 A1 CA2226321 A1 CA 2226321A1
Authority
CA
Canada
Prior art keywords
pattern
pixel
detected
pixels
authentic
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.)
Abandoned
Application number
CA002226321A
Other languages
English (en)
Inventor
Peter Samuel Atherton
Charles E. Chandler
Robert J. Potter
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.)
Mikoh Technology Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2226321A1 publication Critical patent/CA2226321A1/fr
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/1092—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices sensing by means of TV-scanning
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
    • G06V10/74—Image or video pattern matching; Proximity measures in feature spaces
    • G06V10/75—Organisation of the matching processes, e.g. simultaneous or sequential comparisons of image or video features; Coarse-fine approaches, e.g. multi-scale approaches; using context analysis; Selection of dictionaries
    • G06V10/751—Comparing pixel values or logical combinations thereof, or feature values having positional relevance, e.g. template matching

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • General Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Computing Systems (AREA)
  • Databases & Information Systems (AREA)
  • Evolutionary Computation (AREA)
  • Medical Informatics (AREA)
  • Software Systems (AREA)
  • Multimedia (AREA)
  • Collating Specific Patterns (AREA)
  • Image Input (AREA)

Abstract

L'invention porte sur un authentificateur d'images optiques et le procédé associé selon lequel une matrice de pixels d'intensité lumineuse est détectée et comparée pixel par pixel avec une matrice de pixels de référence de manière à déterminer si chacun des pixels est bon ou mauvais. L'authentification se fait sur la base des pixels bons ou mauvais ou de leur rapport. On affecte à chacun des pixels une échelle de gris ou une valeur binaire. Les valeurs sont attribuées en fonction de différents niveaux de seuils. La mémoire optique peut être du type grille de diffraction pixélisée ou du type "pixelgramme". La détection se fait par l'intermédiaire d'un détecteur à couplage de charge, et un laser balaye chacune des trames. La position du point de départ du motif détecté est mise en concordance avec les positions respectives du motif authentique. Ce dernier est stocké sous une variété de formes ayant été l'objet d'une rotation ou d'une translation linéaire. Cette invention présente un intérêt dans le domaine des titres et des cartes de crédit.
CA002226321A 1995-08-07 1996-08-07 Authentificateur d'images optiques Abandoned CA2226321A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN4629A AUPN462995A0 (en) 1995-08-07 1995-08-07 Optical memory data detector and authenticator
AUPN4629 1995-08-07

Publications (1)

Publication Number Publication Date
CA2226321A1 true CA2226321A1 (fr) 1997-02-20

Family

ID=3788963

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002226321A Abandoned CA2226321A1 (fr) 1995-08-07 1996-08-07 Authentificateur d'images optiques

Country Status (5)

Country Link
EP (1) EP0843860A4 (fr)
JP (1) JPH11510283A (fr)
AU (1) AUPN462995A0 (fr)
CA (1) CA2226321A1 (fr)
WO (1) WO1997006502A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3980706B2 (ja) * 1997-05-23 2007-09-26 危機管理株式会社 Ｉｃカードおよびその認証装置
GB9802990D0 (en) 1998-02-13 1998-04-08 Ncr Int Inc Sheet recognition system
EP1116164A1 (fr) 1998-09-29 2001-07-18 Angstrom Technologies, Inc. Systeme d'authentification de premier ordre
US7191156B1 (en) 2000-05-01 2007-03-13 Digimarc Corporation Digital watermarking systems
EP1288847B1 (fr) * 2001-08-30 2005-11-16 Matsushita Electric Industrial Co., Ltd. Procédé et dispositif d'identification d'images identiques
DE102004036229A1 (de) * 2004-07-26 2006-02-16 Giesecke & Devrient Gmbh Verfahren für die Prüfung von Banknoten
FR2896326B1 (fr) * 2006-01-16 2008-04-11 Newtone Technologies Sarl Procede et dispositif pour la detection de documents imprimes
US8659654B2 (en) 2006-10-11 2014-02-25 Microsoft Corporation Image verification with tiered tolerance
CN107331026B (zh) * 2017-06-14 2019-12-10 深圳怡化电脑股份有限公司 一种纸币识别方法及装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197584A (en) * 1978-10-23 1980-04-08 The Perkin-Elmer Corporation Optical inspection system for printing flaw detection
JPH03223976A (ja) * 1990-01-29 1991-10-02 Ezel Inc 画像照合装置
JPH03260782A (ja) * 1990-03-09 1991-11-20 Eastman Kodak Japan Kk パターン認識装置
AU8204391A (en) * 1990-06-14 1992-01-07 Imaging Technology, Inc. Patterned part inspection
DE69124312T2 (de) * 1990-08-07 1997-05-07 Yozan Inc Verfahren zur Prüfung von Fingerabdrücken
US5091968A (en) * 1990-12-28 1992-02-25 Ncr Corporation Optical character recognition system and method
EP0587669A4 (fr) * 1991-06-05 1995-02-22 Mikoh Pty Ltd Memoires optiques comprenant des reseaux de diffraction.
WO1994012949A1 (fr) * 1992-12-02 1994-06-09 Mikos Ltd. Procede et appareil de correlation eclair
TW400952U (en) * 1993-04-06 2000-08-01 Commw Scient Ind Res Org Optical data element
EP0704066B1 (fr) * 1993-05-25 2001-10-17 Commonwealth Scientific And Industrial Research Organisation Dispositif diffracteur a images multiples
US5517234A (en) * 1993-10-26 1996-05-14 Gerber Systems Corporation Automatic optical inspection system having a weighted transition database

Also Published As

Publication number Publication date
EP0843860A4 (fr) 2001-03-07
WO1997006502A1 (fr) 1997-02-20
AUPN462995A0 (en) 1995-08-31
EP0843860A1 (fr) 1998-05-27
JPH11510283A (ja) 1999-09-07

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued