Embedding watermark into halftone image with low distortion...

Facsimile and static presentation processing – Static presentation processing – Attribute control

Reexamination Certificate

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C358S003260, C358S003280

Reexamination Certificate

active

07986441

ABSTRACT:
System and methodologies are provided herein for low-distortion image watermarking. Parity relationships between multiple pixels and/or regions of an image can be leveraged as described herein to reduce the amount of toggling required to embed a watermark in an image, thereby increasing watermark efficiency and reducing visual artifacts introduced in a watermarked image. Various algorithms for leveraging parity relationships are described herein, including a Block-Overlapping Parity Check (BOPC) algorithm, a Champagne Pyramid Parity Check (CPPC) algorithm, and a Tree-Based Parity Check (TBPC) algorithm.

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International Search Report & Written Opinion dated Jun. 17, 2009 for PCT Application Serial No. PCT/US08/59300, 11 Pages.

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