基于平衡多小波的改进的盲水印算法  

Improved blind watermarking algorithm based on balance multi-wavelet

作　　者：韩绍程[1] 张兆宁[2] 张玉金[3] 

机构地区：[1]中国民航大学基础实验中心,天津300300 [2]中国民航大学空中交通管理学院,天津300300 [3]广西师范大学电子工程学院,广西桂林541004

出　　处：《计算机工程与设计》2010年第6期1379-1381,1386,共4页Computer Engineering and Design

基　　金：中国民航大学科研基金项目(09CAUC_E10;07kym12)

摘　　要：利用图像经过CARDBAL平衡多小波变换(BMWT)后,能量汇聚且平均分摊在最低分辨率子图像4个分量上的特点,提出了一种基于BMWT和DCT的改进的盲水印算法。在彩色图像的饱和度分量上嵌入一幅二值水印图像,水印嵌入前进行Arnold置乱和混沌加密预处理,保证了算法的安全性。实验结果表明,改进后的算法具有良好的鲁棒性,而且在抵抗JPEG压缩性能方面有明显的提高。Taking advantage of the feature that the energy of an image would gather and spread averagely on four components in the sub-image of the lowest resolution, an improved blind watermarking algorithm is proposed based on BMWT and DCT.The binary watermark images is embedded into the saturation component of a color image.The watermark is pre-processed with Arnold scrambling and chaotic encryption technique before embedded into the cover image, thus ensure the security of the algorithm.Experiments show that the improved algorithm not only has good robustness, but also significantly improve the performance in resist to JPEG compression.

关 键 词：数字水印 彩色图像 CARDBAL多小波 离散余弦变换 盲提取 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]