Computer & Information Science |
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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.
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Received: 25 August 2005
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