摘要
非采样Contourlet变换具有多尺度性、多方向性和平移不变性的优点.提出了一种基于非采样Contourlet变换和SVD结合的数字水印算法,首先对图像进行非采样Contourlet变换得到低频子带,并对该子带系数进行SVD分解,然后将水印信息嵌入到奇异值中.实验表明,该算法在满足不可见性的同时,对常见的攻击有很好的鲁棒性,且提高了对抗JPEG压缩、中值滤波、高斯滤波和旋转攻击的能力.
Nonsubsampled Contourlet Transform possesses the advantages of multi-scale,multi-direction and shift-invariance.In this paper,a new digital watermarking algorithm is proposed based on nonsubsampled Contourlet and singular value decomposition.After the nonsubsampled Contourlet Transform,the low frequency component is got.The singular value of low frequency component is decomposed.The watermark information is embedded in the singular values.The experiment shows that this algorithm can satisfy the invisibility and it is robust to common attacks.It can also improve the ability to resist against JPEG compression,median filtering,Gaussian filtering and rotate attacks.
出处
《云南民族大学学报（自然科学版）》
CAS
2011年第4期305-309,共5页
Journal of Yunnan Minzu University:Natural Sciences Edition
基金
云南省教育厅科学研究基金(09J0061
2010J071)
