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Method and apparatus for authenticating documents

Info

Publication number
EP0744716A3
EP0744716A3 EP19960303493 EP96303493A EP0744716A3 EP 0744716 A3 EP0744716 A3 EP 0744716A3 EP 19960303493 EP19960303493 EP 19960303493 EP 96303493 A EP96303493 A EP 96303493A EP 0744716 A3 EP0744716 A3 EP 0744716A3
Authority
EP
Grant status
Application
Patent type
Prior art keywords
values
documents
set
discriminant
intensity
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.)
Granted
Application number
EP19960303493
Other languages
German (de)
French (fr)
Other versions
EP0744716A2 (en )
EP0744716B1 (en )
Inventor
Heather L. Cumming
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.)
NCR International Inc
Original Assignee
NCR International Inc
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

Links

Classifications

    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07DHANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00Testing specially adapted to determine the identity or genuineness of paper currency or similar valuable papers or for segregating those which are alien to a currency or otherwise unacceptable

Abstract

In a method and apparatus for authenticating documents, at least one small area (22) on a document (12) being tested is sensed by a spectroscope (26), and the light intensity at a plurality (e.g. 50) of spectral points is measured by a photodiode array (30). The resulting signals are digitized in an analog-to-digital converter (38) and the resulting data is stored. This data is then analyzed by discriminant analysis, whereby the intensity values treated as components of a vector are multiplied by one or more sets of weighting coefficients (discriminant functions) to provide a set of discriminant function values. A distance measurement between this set of values and the centroid of a corresponding set of values for genuine documents is compared with a threshold value to determine the authenticity of the document (12).
EP19960303493 1995-05-25 1996-05-16 Method and apparatus for authenticating documents Revoked EP0744716B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9510678A GB9510678D0 (en) 1995-05-25 1995-05-25 Method and apparatus for authenticating documents
GB9510678 1995-05-25

Publications (3)

Publication Number Publication Date
EP0744716A2 true EP0744716A2 (en) 1996-11-27
EP0744716A3 true true EP0744716A3 (en) 1996-12-18
EP0744716B1 EP0744716B1 (en) 1999-12-29

Family

ID=10775074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960303493 Revoked EP0744716B1 (en) 1995-05-25 1996-05-16 Method and apparatus for authenticating documents

Country Status (5)

Country Link
JP (1) JPH0916777A (en)
DE (2) DE69605854T2 (en)
EP (1) EP0744716B1 (en)
ES (1) ES2140787T3 (en)
GB (1) GB9510678D0 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4349849B2 (en) 2003-06-17 2009-10-21 日立オムロンターミナルソリューションズ株式会社 Tracking method of deposit automatic teller machines and the bill
DE10346636A1 (en) 2003-10-08 2005-05-12 Giesecke & Devrient Gmbh Device and method for checking value documents
DE102009058438A1 (en) * 2009-12-16 2011-06-22 Giesecke & Devrient GmbH, 81677 Procedures for checking documents of value
DE102009058439A1 (en) * 2009-12-16 2011-06-22 Giesecke & Devrient GmbH, 81677 Procedures for checking documents of value
CN102254370B (en) * 2011-06-17 2013-05-08 深圳市怡化电脑有限公司 Note width and distance detecting and quantity calculating method and device
WO2017185141A1 (en) * 2016-04-29 2017-11-02 Ccl Secure Pty Ltd A method and system for identifying and measuring a defect that reduces transparency in a substrate for a security document

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4526466A (en) * 1983-09-01 1985-07-02 Rca Corporation Technique for verifying genuineness of authenticating device
WO1985002928A1 (en) * 1983-12-27 1985-07-04 Bergstroem Arne Apparatus for authenticating bank notes
US4577235A (en) * 1984-08-20 1986-03-18 The Mead Corporation Text/continuous tone image decision processor
US5304813A (en) * 1991-10-14 1994-04-19 Landis & Gyr Betriebs Ag Apparatus for the optical recognition of documents
US5392364A (en) * 1991-05-23 1995-02-21 Matsushita Electric Industrial Co., Ltd. Object inspection method employing selection of discerning features using mahalanobis distances

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4526466A (en) * 1983-09-01 1985-07-02 Rca Corporation Technique for verifying genuineness of authenticating device
WO1985002928A1 (en) * 1983-12-27 1985-07-04 Bergstroem Arne Apparatus for authenticating bank notes
US4577235A (en) * 1984-08-20 1986-03-18 The Mead Corporation Text/continuous tone image decision processor
US5392364A (en) * 1991-05-23 1995-02-21 Matsushita Electric Industrial Co., Ltd. Object inspection method employing selection of discerning features using mahalanobis distances
US5304813A (en) * 1991-10-14 1994-04-19 Landis & Gyr Betriebs Ag Apparatus for the optical recognition of documents

Also Published As

Publication number Publication date Type
DE69605854D1 (en) 2000-02-03 grant
EP0744716A2 (en) 1996-11-27 application
JPH0916777A (en) 1997-01-17 application
EP0744716B1 (en) 1999-12-29 grant
GB9510678D0 (en) 1995-07-19 grant
DE69605854T2 (en) 2000-07-20 grant
ES2140787T3 (en) 2000-03-01 grant

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