一种非对称鲁棒性盲水印算法

针对数字图像版权保护,提出一种非对称鲁棒性盲数字水印方法。通过将水印嵌入到最少受图像改变影响的子空间,使嵌入水印具有鲁棒性,且通过对特征子空间的选取限制,使算法具有较高的检测概率和安全性以及较低的虚警概率。同时,水印嵌入矩阵与提取矩阵不同,它可公开除密钥外的所有其它的信息,而且能实现水印盲提取。实验结果证明了该算法的鲁棒性。

An asymmetric robust blind watermarking algorithm

As for the problem of copyright protection,this paper proposes an asymmetric robust blind watermarking algorithm and points out that the robustness of the approach lies in hiding a watermark in the subspace that is least susceptible to potential modification.This algorithm is of high detection probability and security and low false alarm probability through the analysis and the constraint of the conditions.At the same time,because different matrix operation to embed and extract a watermark is used,all information for the public except the secret key can be released,and the blind extraction of the embedded watermark without reference image can be realized.The robustness of this method is demonstrated by various attacks through computer simulation.