基于小波零树结构的图像水印算法  

Wavelet zerotree-based watermarking algorithms for still images

作　　者：郭磊[1] 郭宝龙[1] 陈龙谭[1] 陈生谭[1] 

机构地区：[1]西安电子科技大学机电工程学院,陕西西安710071

出　　处：《西安电子科技大学学报》2003年第5期677-681,共5页Journal of Xidian University

基　　金：国家自然科学基金资助项目(69975015);高等学校优秀青年教师资助计划

摘　　要：针对数字图像水印与图像压缩这个二元性问题,提出了两种在图像的压缩域中嵌入水印的算法.算法利用嵌入式小波零树编码算法中的小波零树结构,分别采用扩频思想和量化思想,称之为小波零树扩频水印算法和小波零树量化水印算法.实验结果表明,这两种水印算法对于压缩攻击是鲁棒的,并且小波零树扩频水印算法可以进行水印的分级检测,而小波零树量化水印算法则实现了盲检测.With the development of network techniques, the security issue of multimedia information becomes more and more important. The digital watermarking technique is an effective way for copyright protection of multimedia information, and becomes an exciting research field. In this paper, two wavelet zerotreebased watermarking algorithms are proposed. They adopt the wavlet zerotree structure defined in Embedded Image Coding algorithms, and use the principles of spread spectrum and quantization, respectively. The experimental results show that the algorithms are robust for compression attack, and spread spectrumbased algorithm can realize the progressive detection of watermarking.

关 键 词：数字图像水印 图像压缩 小波零树 扩展频谱 量化 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]