基于混沌序列的DWT域图像水印算法  

Image Watermarking in DWT Domain with Chaotic Sequences

作　　者：尹显东[1] 姚军[1] 李在铭[2] 邓君[1] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900 [2]电子科技大学通信与信息工程学院,四川成都610054

出　　处：《信息与电子工程》2005年第2期81-85,共5页information and electronic engineering

基　　金：国家自然科学基金NSAF联合基金(10376005);国防科技预先研究基金(413300204);中国工程物理研究院科学技术基金(No.20040761)

摘　　要：数字媒体版权保护已经变得十分迫切和必要,有效的盗版确认方法是实现版权保护的前提。本文提出一种基于混沌序列加密的频率域数字图像水印算法,先将二值图像水印信号采用混沌序列加密,然后再通过另外一个混沌序列控制水印嵌入在小波变换域系数中位置,实现小波系数中隐藏不可见水印的技术。实验结果表明,该项技术具有非常好的安全性;水印提取在DWT域中进行,不需要原始图像;该方法嵌入的水印不可见性好,对JPEG-2000压缩、图像剪切和图像加噪声攻击具有较好的鲁棒性。The copyright protection of digital multimedia has become an impending issue. The effective pirate validation of the digital multimedia is the precondition for effective copyright protection. In this paper, an improved algorithm in discrete wavelet transform （DWT） domain based on chaotic sequences encryption is proposed. The watermark is a binary image and is embedded into DWT domain of the original image by the algorithm, which can assure very good security for the watermark. The watermark is extracted from encrypted watermarked image without the original unmarked image. The experimental results show that the algorithm can assure good imperceptibility for watermark image and the watermark embedded using the algorithm has good robustness against the attacks such as JPEG-2000 compression, image sharing and noise addition.

关 键 词：信息处理技术 数字水印 混沌加密 离散小波变换 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]