基于Contourlet变换的乘性水印及盲检测算法  

Multiplicative Watermarking and Blind Detection Algorithm Based on Contourlet Transform

作　　者：朱香卫[1] 肖亮[2] 吴慧中[2] 

机构地区：[1]南京铁道职业技术学院苏州校区,苏州215031 [2]南京理工大学计算机科学与技术学院,南京210094

出　　处：《计算机工程》2009年第5期150-152,共3页Computer Engineering

摘　　要：基于Contourlet变换对其高频系数进行统计分析,从理论和实验方面证明Contourlet变换的高频系数符合广义高斯分布,采用极大似然估计的方法对Contourlet变换系数的边缘分布和联合分布进行拟合,提出一种Contourlet变换域乘嵌入水印及盲检测框架。实验证明,所提出水印检测器具备良好的检测性能。Based on Contourlet transformation knowledge foundation, the Contourlet transformation high frequency coefficients is carried on the statistical analysis. The theory and the experiment proves that the Contourlet transformation high frequency coefficient conforms to the generalized Gaussian distribution, adopting the estimation of marginal and joint statistical distribution of Contourlet coefficients via the method of maximum likelihood estimator. Embedded multiplicative watermarking and blind detection frame is presented in the Contourlet transformation domain. Experiments prove watermarking detector with a good detection performance.

关 键 词：CONTOURLET变换 广义高斯分布 乘嵌入水印 盲检测 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]