摘要
针对水印嵌入伪Zernike矩信息量小的不足,设计一种基于非下采样Contourlet变换和伪Zernike矩的水印算法。算法首先将水印信息量化调制嵌入原始图像的非下采样Contourlet变换域低频区域,然后计算伪Zernike矩进行几何校正。实验结果表明,该算法在具有较大的水印嵌入量的同时,对常见图像处理和几何攻击具有较好的鲁棒性。
In order to solve the shortage of small information of the pseudo-Zernike moments embedded in watermark,we design a watermarking algorithm which is based on non-subsampled Contourlet transform and pseudo-Zernike moment in this paper.First,the algorithm quantifies and modulates the digital watermark information and embeds it into low frequency sub-band of the non-subsampled Contourlet transform region of primitive image.Secondly,the pseudo-Zernike moments are calculated and the geometric correction is made.Experimental results show that the proposed algorithm has quite big watermark embedding capacity,meanwhile it is also robust on common image processing and against geometric attacks.
出处
《计算机应用与软件》
CSCD
北大核心
2012年第11期172-176,共5页
Computer Applications and Software
基金
四川省教育厅青年基金项目(11zc021)
