Owner Digimarc Corporation

Inventors Rhoads, Geoffrey B.

Agent Spruson & Ferguson

Pub. Number AU-B-2009200468

Parent 2005205804

Filing date 6 February 2009

Wipo publication date 26 February 2009

Acceptance publication date 31 March 2011

G09C 5/00 (2006.01) Ciphering or deciphering apparatus or methods not provided for in other groups of this subclass, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages

G06F 12/00 (2006.01) Accessing, addressing or allocating within memory systems or architectures

G06F 13/00 (2006.01) Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units

G06F 17/00 (2006.01) Digital computing or data processing equipment or methods, specially adapted for specific functions

G06F 17/30 (2006.01) Digital computing or data processing equipment or methods, specially adapted for specific functions - Information retrieval

G06K 7/00 (2006.01) Methods or arrangements for sensing record carriers

G06K 9/00 (2006.01) Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints

G06K 9/36 (2006.01) Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - Image preprocessing, i.e. processing the image information without deciding about the identity of the image

G06K 19/06 (2006.01) Record carriers for use with machines and with at least a part designed to carry digital markings - characterised by the kind of the digital marking, e.g. shape, nature, code

G06Q 30/00 (2006.01) Commerce, e.g. marketing, shopping, billing, auctions or e-commerce

G07F 17/26 (2006.01) Coin-freed apparatus for hiring articles

H04L 9/00 (2006.01) Arrangements for secret or secure communication