一种基于关系的小波域水印算法  

A digital watermarking algorithm based upon relationship in wavelet transform domain

作　　者：郑秋梅[1] 杨发科[1] 蒋晓红[1] 

机构地区：[1]中国石油大学计算机与通信工程学院,山东东营257061

出　　处：《中国石油大学学报（自然科学版）》2009年第2期164-168,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'863'计划项目(2007AA09Z301)

摘　　要：提出了一种新的基于关系的小波域数字水印算法。选用二值图像作为待嵌入的水印,考虑人眼视觉特性来选择水印的嵌入位置,对小波分解子带LH2和HL2作2×2分解,根据二值图像像素取值来调整小波系数的大小关系。试验结果表明,新算法能够保证稳健性和不可见性,具有较高的峰值信噪比。A novel watermarking scheme based upon relationship in wavelet transform domain was proposed. In this algorithm, binary image was used as the watermark. According to human visual features, detail sub-images, LH2 and HL2 , were selected as the embedding locations, and were divided into non-overlap 2 × 2 blocks. In these blocks, watermarks were embedded and the relationships of wavelet transform coefficients were adjusted. The test results show that this algorithm is imperceptible and robust, and has higher peak of signal-to-noise ratio（PSNR）.

关 键 词：数字水印 小波域 图像置乱 关系 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]