摘要
数字水印技术是解决多媒体数据包括卫星遥感图像等版权保护的一种有效手段。本文给出了数字水印技术的基本概念及主要特征,介绍了利用局部迭代函数系统进行分形图像编码的传统编码方法,研究并分类了现有分形数字图像水印方法:一类方法通过改变分形编码的编码参数,另一类方法利用图像的自相似性,还有一些用分形与其它理论相结合来嵌入水印信息。最后作者提出了进一步发展分形数字图像水印技术的几点建议。
Digital watermayking technique is one of the effective solutions to protect the copyrights of multimedia data including satellite and remote sensing images. This paper gives the basic conception and main features of digital watermayking technique, describes the conventional fractal image coding method using local iterated function systems, sumMayizes and classifies the existing digital image watermayking approaches based on fractal coding, one kind of which changed the fractal coding parameters, another kind of which utilized the image self-similarity, the last kind of which combined fractal and other theories, to insert the watermayks. Finally some useful suggestions are given for further development of fractal digital image watermayking techniques.
出处
《航空计算技术》
2004年第2期1-5,8,共6页
Aeronautical Computing Technique
基金
陕西省自然科学基金项目(2002F32)
陕西省教育厅专项基金项目(02JK151)
西安市科技局科技攻关项目(GG200232)。
关键词
分形
数字图像水印
局部迭代函数
自相似性
digital waterJunking
fractal
local iterated function system
self-similarity
image
