Method and system for watermarking

Details Method and system for watermarking Method and system for watermarking

2004-12-10

2009-08-04

Tabatabai, Abolfazl (Department: 2624)

Image analysis

Applications

C713S176000

Reexamination Certificate

active

07570782

ABSTRACT:
Embedding a watermark includes identifying watermark locations in the data stream, partitioning the identified watermark locations into watermark location blocks each to be embedded with a watermark value portion from the watermark value and altering a predetermined maximum number of data stream values to embed the watermark value portion and introduce no more than a predetermined level of distortion according to a code table. Extracting the watermark bit-sequence includes identifying watermark locations in the data stream, partitioning the identified watermark locations into watermark location blocks each expected to be embedded with a watermark value portion from the watermark value and generating the watermark value by matching each data stream value to a watermark value portion using a code table.

REFERENCES:
patent: 5862260 (1999-01-01), Rhoads
patent: 5901178 (1999-05-01), Lee et al.
patent: 6957350 (2005-10-01), Demos
patent: 7046820 (2006-05-01), Yu
patent: 7095874 (2006-08-01), Moskowitz et al.
patent: 7177479 (2007-02-01), De Ponti et al.
patent: 7197368 (2007-03-01), Kirovski et al.
patent: 7254249 (2007-08-01), Rhoads et al.
patent: 2002/0120849 (2002-08-01), McKinley et al.

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