基于超混沌迭代的双重零水印算法

提出一种用超混沌迭代产生的序列进行加密的双重零水印算法，用图像离散余弦变换和小波变换后的重要系数分别构造零水印，以提高水印算法的抗攻击能力，采用超混沌序列进行加密，以提高系统的安全性。实验结果表明，该算法提高了水印系统的综合性能，具有较好的不可见性、鲁棒性和安全性。

Double Zero-watermarking Algorithm Based on Hyperchaotic Iteration

This paper presents a double zero-watermarking algorithm based on transform domain and hyperchaotic iteration. It uses the important coefficients of Discrete Cosine Transform(DCT) domain and Discrete Wavelet Transform(DWT) domain to constructure zero watermarkings separately, uses a hyperchaotic sequence to encrypt, so that the robustness, invisibility and security are improved. Experimental results show that the algorithm improves the integrated performance of the watermarking system.