基于超混沌和小波变换的鲁棒性水印算法  

Robust Digital Watermarking Algorithm Based on Continuous Hyperchaotic System and Wavelet Transform

作　　者：殷虹[1] 杨晓辉[1] 石连栓[1] 

机构地区：[1]天津工程师范学院计算机系,天津硕士讲师300222

出　　处：《微计算机信息》2006年第07S期213-215,共3页Control & Automation

基　　金：天津市自然科学基金资助项目(02360081)

摘　　要：提出了一种基于连续超混沌系统和离散小波变换(DWT)相结合的鲁棒性数字水印算法。该算法利用连续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(HVS)的特性,对宿主图像在YIQ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DWT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 continuous hyperchaotic system and discrete wavelet transform is presented in this paper, which make hyperchaotic sequence generated by the continuous hyperchaotic system generate cipher sequence to encrypt the watermark image. At the same time , the characteristics of human visual system （HVS） is utilized to embed the watermarks which has been 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 indicate beth the robustness and the 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]