METHOD FOR CONSTRUCTING A COMPOSITE IMAGE INCORPORATING A HIDDEN AUTHENTICATION IMAGE

Title:

METHOD FOR CONSTRUCTING A COMPOSITE IMAGE INCORPORATING A HIDDEN AUTHENTICATION IMAGE

Document Type and Number:

WIPO Patent Application WO/2012/051192

Kind Code:

A3

Abstract:

A method is provided for constructing a composite image having an authentication image formed therein. The authentication image is viewable using a decoder lens having one or more decoder lens frequencies. The method comprises generating a first plurality of component images in which corresponding tonal areas are tonally balanced around at least one tonal value. At least one of the component images is configured to include a representation of the authentication image. The method further comprises determining a pattern of component image elements for each of the component images. The pattern having at least one element frequency that is equal to or a multiple of a decoder lens frequency. At least a portion of the content of each component image element is extracted and used to construct a composite image element.

Inventors:

CVETKOVIC SLOBODAN (US)
ALASIA THOMAS C (US)
ALASIA ALFRED J (US)

Application Number:

PCT/US2011/055787

Publication Date:

June 13, 2013

Filing Date:

October 11, 2011

Export Citation:

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Assignee:

GRAPHIC SECURITY SYSTEMS CORP (US)
CVETKOVIC SLOBODAN (US)
ALASIA THOMAS C (US)
ALASIA ALFRED J (US)

International Classes:

G06K9/32

Foreign References:

US20050237577A1	2005-10-27
US20070248364A1	2007-10-25
US20080044015A1	2008-02-21
US4198147A	1980-04-15
US20070003294A1	2007-01-04
US20050109850A1	2005-05-26
US7262885B2	2007-08-28
US6760464B2	2004-07-06

Other References: