Image watermaking method using human visual system

Details Image watermaking method using human visual system Image watermaking method using human visual system

2003-11-17

2009-08-25

Moise, Emmanuel L (Department: 2437)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C726S032000, C380S201000

Reexamination Certificate

active

07581104

ABSTRACT:
A moving image watermarking method, which forms a global masking map by combining frequency masking, spatial masking and motion masking values together and inserts a watermark according to the formed global masking map through the use of a human visual system is provided. In the moving image watermarking method, a watermark value is obtained by exclusive-ORing a random key value and a binary value of a logo image. A plurality of masking operations are separately performed. A global masking value is obtained through the separate masking operations. A watermarked frame value is obtained by adding a watermark value weighted by the global masking value and a control variable to an original frame value.

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Digital Watermarking Applied to MPEG-2 Coded Video Sequences Exploiting Space and Frequency Masking Simone Arena, Marcello Caramma, Rosa Lancini Cefriel Via Fucini 2, Milano, 1-20133, Italy Tel. +39 02 23954-209, Fax. +39 02 23954-254{ arena,marcello,rosa} @cefriel.it.

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