DWT域的关系数据库鲁棒性盲水印算法研究  

Research of relational database robust blind watermark algorithm in DWT domain

作　　者：徐龙琴[1] 

机构地区：[1]广东海洋大学信息学院,广东湛江524025

出　　处：《计算机工程与应用》2010年第22期153-156,共4页Computer Engineering and Applications

基　　金：国家星火计划项目(No.2007EA780068);广东省自然科学基金No.7010116;广东省粤港关键领域重点突破项目(No.2006A25007002);广东省科技计划项目(No.2008B021300002);湛江市科技计划项目(No.2008C08017)~~

摘　　要：针对数据库水印鲁棒性与不可感知性的矛盾,提出了一种基于小波变换(DWT)的数据库鲁棒性盲水印算法。算法首先利用筛选算法筛选出可嵌入水印的候选属性,并进行子集分割与重排,然后分别对子集数据、置乱水印图像进行DWT变换,通过压缩算法将水印低频部分压缩后嵌入到子集数据的高频部分,实现水印与原始数据的融合。理论分析和实验表明,该算法具有较强的鲁棒性和较好的不可见性。According to the contradiction between the robustness and imperceptibility of database watermarks, a robust blind watermarking algorithm based on wavelet transformation is put forward.By screening programming,the algorithm screens the candidate attributes which can embed watermarks, and splits and re-ranges the subset, and then respectively DWT transforms the subset data and the scrambling watermarking images.With the condensation algorithm,the low-frequency part of the water- mark is condensed and embedded into the high-frequency part of the subset data, so as to achieve the mergence of watermarks and original data.Theoretical analyses and experiments show that this algorithm possesses strong robustness and good invisibility.

关 键 词：关系数据库水印 小波变换 压缩 鲁棒 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程]