基于整数小波变换的可逆数据库水印  

Reversible database watermark based on integer wavelet transform

作　　者：姜传贤[1] 程小辉[1] 许鑫磊 李智[2] JIANG Chuan-xian CHENG Xiao-hui XU Xin-lei LI Zhi(School of Information Science and Engineering, Guilin University of Technology, Guilin 541004, China School of Computer Science and Information, Guizhou University, Guiyang 550025 , China)

机构地区：[1]桂林理工大学信息科学与工程学院,广西桂林541004 [2]贵州大学计算机科学与技术学院,贵阳550025

出　　处：《桂林理工大学学报》2017年第1期191-195,共5页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(61262076;61262075;61462013);广西自然科学基金项目(2014GXNSFAA118379)

摘　　要：提出了一种基于整数小波变换的可逆数据库水印算法,通过对数据库数据的小波域高频系数进行分析,确定算法的溢出预防机制。将水印嵌入到数据库数据的小波域中,提高水印的不可见性。分块策略的使用进一步提高了水印的不可见性。通过修改数据块的小波高频系数均值,将一位水印与数据块绑定来提高水印的鲁棒性。仿真实验表明,该水印具有良好的不可见性和一定的鲁棒性。A reversible database watermark based on integer wavelet transform is proposed. High frequency co-efficients of wavelet domain of the database data are analyzed to determine the overflow prevention mechanism of the scheme. The watermark is embedded into the wavelet domain of the database in order to improve the water-marking invisibility. Blocking strategy is used to further enhance the watermarking invisibility. By modifying the mean of the wavelet high frequency coefficients of the data block, we can embed one watermark into the data block to improve the robustness of the watermark. Experimental results show that the scheme is effective.

关 键 词：可逆数据库水印 整数小波变换 鲁棒性 不可见性 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]