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United States of America Patent

PATENT NO 8934660
APP PUB NO 20120106780A1
SERIAL NO

13282268

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Disclosed is a method (500) of encoding a message (501) into a target area of an original image by determining a set of data items into which the message can be partitioned, partitioning the message into the data items, encoding (580) a first mark into the target area at a location determined by applying (550) a hash function (505) to a first data item, and encoding (580) a second mark into the target area at a location dependent upon (a) a hash value determined by applying (550) the hash function (505) to the first data item and a second data item, (b) the location of the encoded first mark, and (c) a predetermined constraint (504), wherein the first and second marks form at least part of a pattern of marks in the target area of the encoded image, the pattern having a visual characteristic defined by the predetermined constraint.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ellis, Paul Joseph Gladesville, AU 3 20

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