基于离散小波变换的数据库水印检测算法  

New algorithm for relational database watermarking based on DWT

作　　者：姜传贤[1] 陈孝威[1] 

机构地区：[1]贵州大学计算机科学与技术学院,贵阳550025

出　　处：《控制与决策》2009年第7期1078-1082,共5页Control and Decision

基　　金：贵州省科研基金项目(黔科合20052109)

摘　　要：为了克服空域水印技术的不足,提出一种基于离散小波变换的关系数据库水印算法.根据过滤规则,从关系数据库中抽取某一类的数据,组成二维信号,将水印嵌入到二维信号的小波域中.使用该算法嵌入的数字水印具有很好的隐蔽性,对原始载体的影响很小.同时,嵌入的数字水印具有较好的鲁棒性,常规的数据库的处理方法对其影响较弱.In order to enhance the robustness of database watermark, the paper proposes a relational database watermarking algorithm based on discrete wavelet transform （DWT）. Some types of data are selected from the relational database according to filtering rules, and two-dimension signal is formed. Then, the watermark is embedded into the wavelet domain of two-dimension signal. Experimental results show that the embedded digital watermarks with the proposed algorithm are invisible and robust enough against the commonly used database processing techniques.

关 键 词：关系数据库水印 离散小波变换 信息检测 数值型属性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]