Patent Number: 7,826,637

Title: Digital watermark embedding apparatus, digital watermark detecting apparatus, digital watermark embedding method, digital watermark detecting method and computer program product

Abstract: A digital watermark embedding apparatus for embedding watermark information into a digital content, obtains a predetermined topological invariant corresponding to the watermark information to be embedded into the digital content, and sets the predetermined topological invariant to the digital content by modifying the digital content into which the watermark information is to be embedded.

Inventors: Muratani; Hirofumi (Kawasaki, JP)

Assignee: Kabushiki Kaisha Toshiba

International Classification: G06K 9/00 (20060101); H04L 9/32 (20060101)

Expiration Date: 2019-11-02 0:00:00