DCT系数的分块奇异值非对称水印算法

Asymmetric watermarking algorithm of singular value of DCT coefficients block

提出了基于DCT中频系数的分块奇异值非对称数字水印算法。该算法利用Logistic混沌映射和Walsh序列构造嵌入水印,将水印嵌入到由最大奇异值构成的特征空间,并采用相关值计算方法对水印进行检测。理论分析和实验结果表明,该非对称水印算法检测性能良好,具有很强的鲁棒性。

This paper proposed a asymmetric digital watermarking algorithm based on singular value of DCT coefficients block. This algorithm uses the Logistic chaotic map and Walsh sequences to construct the embedded watermark. The watermark is embedded in a feature space constituted by the maximum singular value, and the correlation value calculation method was used to detect the watermark. The theoretical analysis and experimental results show that the asymmetric watermarking algorithm has a good detection performance and robustness.