ZA200502978B - Authentication of documents and articles by moiré patterns. - Google Patents

Authentication of documents and articles by moiré patterns. Download PDF

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Publication number
ZA200502978B
ZA200502978B ZA200502978A ZA200502978A ZA200502978B ZA 200502978 B ZA200502978 B ZA 200502978B ZA 200502978 A ZA200502978 A ZA 200502978A ZA 200502978 A ZA200502978 A ZA 200502978A ZA 200502978 B ZA200502978 B ZA 200502978B
Authority
ZA
South Africa
Prior art keywords
patterns
layer
base
revealing
base layer
Prior art date
Application number
ZA200502978A
Other languages
English (en)
Inventor
Roger D Hersch
Sylvain Chosson
Original Assignee
Ecole Polytech
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
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Application filed by Ecole Polytech filed Critical Ecole Polytech
Publication of ZA200502978B publication Critical patent/ZA200502978B/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/342—Moiré effects
    • 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
    • G07D7/003—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 security elements
    • G07D7/0032—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 security elements using holograms
    • 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
    • G07D7/207—Matching patterns that are created by the interaction of two or more layers, e.g. moiré patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Computer Security & Cryptography (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
  • Details Of Garments (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
ZA200502978A 2002-10-16 2005-04-13 Authentication of documents and articles by moiré patterns. ZA200502978B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/270,546 US7194105B2 (en) 2002-10-16 2002-10-16 Authentication of documents and articles by moiré patterns

Publications (1)

Publication Number Publication Date
ZA200502978B true ZA200502978B (en) 2006-02-22

Family

ID=32092447

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA200502978A ZA200502978B (en) 2002-10-16 2005-04-13 Authentication of documents and articles by moiré patterns.

Country Status (18)

Country Link
US (1) US7194105B2 (ja)
EP (1) EP1554700B1 (ja)
JP (1) JP4427796B2 (ja)
KR (1) KR101119653B1 (ja)
CN (1) CN100520804C (ja)
AT (1) ATE350734T1 (ja)
AU (1) AU2003260925B2 (ja)
BR (1) BRPI0315389B1 (ja)
CA (1) CA2534797C (ja)
DE (1) DE60310977T2 (ja)
ES (1) ES2280842T3 (ja)
HK (1) HK1082833A1 (ja)
MX (1) MXPA05003834A (ja)
NZ (1) NZ539378A (ja)
PL (1) PL219620B1 (ja)
RU (1) RU2328036C2 (ja)
WO (1) WO2004036507A2 (ja)
ZA (1) ZA200502978B (ja)

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