基于混沌加密的小波包盲水印算法

A Wavelet Packet Blind Watermarking Algorithm Based on Chaos Encryption

利用混沌系统的特点调制了两种不同的混沌序列,分别用于水印加密和子图像的抽取.对子图像进行小波包分解,通过修改小波包的系数来嵌入数字水印.水印的提取不需要原始图像,实现了盲提取.实验结果表明,该算法对于常见的JPEG压缩、高斯噪声,裁剪和缩放等攻击具有较好的鲁棒性.

Two chaotic sequences are modulated according characters of chaotic system, using for watermark encryption and sub image extraction. Do wavelet packet decomposition and embed watermark by modifying wavelet packet coefficients. Waternxark extraction process doesn＇t need original image, realize a blind extraction. The experiment results demonstrated that the algorithm is high robust against for various attacks such as JPEG compression, Gaussian noise, cutting and scaling and so on.