基于超混沌和小波变换的鲁棒性数字水印算法  

Robust Digital Watermarking Algorithm Based on Hyperchaos and Wavelet Transform

作　　者：殷虹[1] 陈增强[1] 袁著祉[1] 

机构地区：[1]南开大学自动化系

出　　处：《控制与决策》2006年第9期1024-1027,共4页Control and Decision

基　　金：国家自然科学基金项目(60374037;60574036);教育部博士学科点基金项目(20050055013)

摘　　要：提出一种基于二维超混沌序列和离散小波变换(DW T)相结合的鲁棒性数字水印算法.该算法利用形式简单的二维离散超混沌系统产生的超混沌序列生成密码对水印图像加密,同时根据人类视觉系统的特性,对宿主图像在Y IQ色彩空间中的Y分量进行多级离散小波变换后,将加密后的水印图像嵌入到宿主图像Y分量的DW T中频子带中.实验结果表明算法同时具有良好的鲁棒性和不可见性.An algorithm of digital watermarking based on two-dimentional hyperchaos sequence and discrete wavelet transform is presented, which generates cipher sequence to encrypt the watermark using hyperchaos sequence generated by simple two-dimentional hyperchaos system. The characteristics of human visual system is used to embed the watermarks which is encrypted into mid-frequency subbands coefficients of Y branch of host image after Y branch of host image is transformed by the multilevel structures wavelet transform in the YIQ pattern space. The experimental results show the robustness and invisibility of the proposed algorithm.

关 键 词：超混沌 小波变换 数字水印 图像加密 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]