HUMAN VISUAL MODEL FOR DATA HIDING - MATSUSHITA ELECTRIC IND CO LTD

Title:

HUMAN VISUAL MODEL FOR DATA HIDING

Document Type and Number:

WIPO Patent Application WO2002033650

Kind Code:

A8

Abstract:

A method and apparatus of hiding identification data (12) in visual media. When image or video data is received, frequency masking (14) is performed to divide the image or video data into blocks of smooth regions and blocks of non-smooth regions and to obtain preliminary just-noticeable-difference. Edge detection is performed to divide the non-smooth region of the image or video data into texture blocks and edge blocks (16). The image or video data is then adjusted by applying different strength of watermark in association with the type of each block.

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Inventors:

WU MIN (US)
YU HONG HEATHER (US)

Application Number:

PCT/US2001/032247

Publication Date:

September 12, 2002

Filing Date:

October 17, 2001

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
WU MIN (US)
YU HONG HEATHER (US)

International Classes:

G06T1/00; H04N1/387; (IPC1-7): G06K9/00; G06K9/36

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