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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (3): 285-288    DOI: 10.1631/jzus.2006.A0285
Computer & Information Science     
A new asymmetric watermarking scheme based on a real fractional DCT-I transform
Gui Guo-fu, Jiang Ling-ge, He Chen
Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Abstract  A new asymmetric watermarking scheme is proposed in this letter. In the proposed scheme, a secret real fractional DCT-I transform and a primitive watermark are employed to generate an asymmetric watermark. The secret watermark for embedding is derived from the primitive watermark, and is embedded in the large fractional DCT-I transformation coefficients of a cover signal. The asymmetric detection procedure is performed using a correlation test. Simulation results showed that the asymmetric detection is reliable, and that the scheme can provide minimum security.

Key words： Asymmetric watermarking      DCT-I      Fractional transforms     
Received: 25 August 2005     
CLC:  TP309  
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Gui Guo-fu
Jiang Ling-ge
He Chen
Cite this article:

Gui Guo-fu, Jiang Ling-ge, He Chen. A new asymmetric watermarking scheme based on a real fractional DCT-I transform. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(3): 285-288.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.A0285     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/I3/285

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