详细信息
基于SIFT和非采样Contourlet变换的鲁棒水印算法
A ROBUST WATERMARKING ALGORITHM BASED ON SIFT AND NONSUBSAMPLED CONTOURLET TRANSFORM
文献类型:期刊文献
中文题名:基于SIFT和非采样Contourlet变换的鲁棒水印算法
英文题名:A ROBUST WATERMARKING ALGORITHM BASED ON SIFT AND NONSUBSAMPLED CONTOURLET TRANSFORM
作者:许建[1];黄楠[2]
第一作者:许建
机构:[1]清远职业技术学院网络信息中心;[2]新乡学院计算机与信息工程学院
第一机构:清远职业技术学院网络信息中心,广东清远511510
年份:2013
卷号:30
期号:8
起止页码:68-72
中文期刊名:计算机应用与软件
外文期刊名:Computer Applications and Software
收录:CSTPCD;;北大核心:【北大核心2011】;CSCD:【CSCD2013_2014】;
基金:国家自然科学基金项目(F020704);湖南省教育厅科学研究项目(10C0526;11C0280)
语种:中文
中文关键词:数字水印;非采样Contourlet变换;SIFT;特征点
外文关键词:Digital watermarking Nonsubsampled Contourlet transform(NSCT) Scale invariant feature transform(SIFT) Feature point
摘要:针对常见抗几何攻击水印算法存在的不足,设计一种基于SIFT和非采样Contourlet(NSCT)变换的鲁棒水印算法。算法首先利用尺度不变特征变换在载体图像的尺度空间上提取特征点并形成矩形特征区域,然后水印信息自适应量化嵌入特征区域的NSCT低频变换系数中,最后保存若干个稳定特征点用于几何校正。实验结果表明,该算法不仅具有很好的透明性,同时对常见图像处理攻击和几何攻击均具有很强的鲁棒性。
In order to solve the problem of present watermarking algorithms in resisting to geometric attacks, a robust watermarking algorithm based on scale invariant feature transform (SIFT) and nonsubsampled Contourlet transform (NSCT) is proposed in this paper. Firstly, the SIFT is adopted to extract feature points in scale space of the original image and to construct rectangular feature regions; secondly, the watermark information is embedded in the way of adaptive qnantisation into the low-frequency coefficients of NSCT; finally, some of the stable feature points are reserved for geometric correction. Experimental results show that the proposed algorithm has excellent transparency and is very robust to common image processing attacks and geometric attacks.
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