数字图象水印技术研究

简要论述了数字图象水印技术提出的背景及其概念、应用和要求 ,并介绍了国内外的研究动态 .重点分析了按空域和变换域分类的各种方法 ,比较了它们的优缺点 ,并总结了空域和变换域方法的特点及其应用场合 .由分析可知 ,水印技术必须兼顾不可见性和强壮性 ,并在这两个矛盾之间进行折中 .最后提出了数字水印技术中需要解决的一些问题和下一步的发展方向

Study on Digital Image Watermarking Technology

The background, the concept, the application and the requirement of the digital image watermarking technology was roughly described and the research trend in home and aboard was introduced. The emphasis was on the analysis of all the methods classified by the spatial and the transform domain, also their advantages and disadvantages were compared. In addition, the characteristics and the application situation of the spatial and the transform domain methods were summarized. From the analysis, the watermark technique needs to give attention to both the invisibility and the robustness, and compromise between the contradiction. Finally, some problems on the digital watermark technique which remain to be solved were presented and the direction of the development was pointed out.