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Science Letters:A new asymmetric watermarking scheme based on a real fractional DCT-I transform

Science Letters:A new asymmetric watermarking scheme based on a real fractional DCT-I transform
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摘要 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 em-bedding 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. 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.
出处 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第3期285-288,共4页 浙江大学学报(英文版)A辑(应用物理与工程)
基金 Project (Nos. 60372076 and 60272082) supported by the National Natural Science Foundation of China
关键词 Asymmetric watermarking DCT-I Fractional transforms 不对称水印 分形变换 DCT-I变换 安全性
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