基于混沌加密的图像数字水印算法研究  

A Research on Chaotic Encryption of Digital Watermarking Algorithm of Image

作　　者：龙伟[1] 温媛媛[1] 高政[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,长沙410073

出　　处：《计算机与数字工程》2006年第2期84-86,共3页Computer & Digital Engineering

摘　　要：提出了一种基于混沌加密的图像数字水印算法,该方法是将载体图像作8x8的分块DCT变换,水印图像映射为混沌序列,用载体图像的分块DCT中频系数与混沌序列相加嵌入水印。实验结果表明,图像混沌变换有较高的鲁棒性,水印算法具有安全性高、算法简单以及较好的视觉掩蔽性。This paper presents an algorithm of image digital watermarking in DCT domain based on chaotic eneryption. In this algorithm, cover image is transformed into 8 × 8 block using DCT, and watermark image is mapped into chaos sequence. Then the mid - band of DCT block coefficients of cover image axe used to add chaos sequence to embed watermark. Experiments results show that image chaos transform has better robustness, and this watermark algorithm is simple, and has high security and better vision masking.

关 键 词：数字水印 混沌加密 离散余弦变换 鲁棒性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]