Global Patent Index - EP 0843860 A4

EP 0843860 A4 2001-03-07 - OPTICAL IMAGE AUTHENTICATOR

Title (en)

OPTICAL IMAGE AUTHENTICATOR

Title (de)

AUTHENTIFIZIERUNG VON OPTISCHEN BILDERN

Title (fr)

AUTHENTIFICATEUR D'IMAGES OPTIQUES

Publication

EP 0843860 A4 (EN)

Application

EP 96925610 A

Priority

  • AU 9600498 W
  • AU PN462995 A

Abstract (en)

[origin: WO9706502A1] Optical Image Authenticator and method where a light intensity pixel array is detected and compared with a reference pixel array on a pixel by pixel basis to determine if each pixel is either good or bad. Authentication is done on the basis of the number of good/bad pixel's or their ratio. Pixel's are assigned a grey scale value or a binary value. Values are allocated with respect to different threshold levels. The optical memory can be a pixilated diffraction grating or "pixelgram". Detection is via a CCD sensor and a laser pulses every frame. Detected pattern starting point position is matched with the respective positions in the authentic pattern. The authentic pattern is stored in a variety of forms which have been rotated or linearly translated. For use in the field of securities and credit cards.

IPC 1-7 (main, further and additional classification)

G06K 5/00; G06K 7/10; G06K 9/62; G07D 7/00; G06K 9/64

IPC 8 full level (invention and additional information)

G06K 7/10 (2006.01); G06K 7/12 (2006.01); G06K 9/64 (2006.01); G06K 17/00 (2006.01); G06K 19/06 (2006.01); G06K 19/10 (2006.01); G07D 7/00 (2016.01); G07D 7/06 (2006.01)

CPC (invention and additional information)

G06K 7/1092 (2013.01); G06K 9/6202 (2013.01); G07D 7/00 (2013.01)

Citation (search report)

  • No further relevant documents disclosed
  • See also references of WO 9706502A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9706502 A1 19970220; AU PN462995 A0 19950831; CA 2226321 A1 19970220; EP 0843860 A1 19980527; EP 0843860 A4 20010307; JP H11510283 A 19990907

INPADOC legal status


2005-03-18 [REG HK WD] APPLICATIONS WITHDRAWN, DEEMED TO BE WITHDRAWN, OR REFUSED AFTER PUBLICATION IN HONG KONG

- Document: HK 1011231

2002-07-03 [18W] WITHDRAWN

- Date of withdrawal: 20020503

2001-03-07 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20010118

2001-03-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-03-07 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7G 06K 5/00 A, 7G 06K 7/10 B, 7G 06K 9/62 B, 7G 07D 7/00 B, 7G 06K 9/64 B

1998-05-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980309

1998-05-27 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

1998-05-27 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL PAYMENT 980309;LT PAYMENT 980309;LV PAYMENT 980309;SI PAYMENT 980309