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

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.