汪祖辉,孙刘杰,蒋哲薇,王晓红,刘玄玄.一种抗几何攻击的小波域水印算法[J].包装工程,2015,36(21):102-107,114.
WANG Zu-hui,SUN Liu-jie,JIANG Zhe-wei,WANG Xiao-hong,LIU Xuan-xuan.A Watermarking Algorithm Against Geometric Attack in DWT Domain[J].Packaging Engineering,2015,36(21):102-107,114. |
| 一种抗几何攻击的小波域水印算法 |
| A Watermarking Algorithm Against Geometric Attack in DWT Domain |
| 投稿时间：2015-03-09 修订日期：2015-11-10 |
| DOI： |
| 中文关键词: 数字水印 SIFT DWT 抗几何攻击 参数估计 |
| 英文关键词: digital watermarking SIFT DWT anti geometric attacks parameter estimation |
| 基金项目:2014上海理工大学校级大学生创新创业项目 （XJ2014244） |
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| 中文摘要: |
| 目的 针对小波变换域数字水印算法抗几何攻击能力差的问题， 提出一种基于SIFT特征点匹配的DWT数字水印算法。方法 将SIFT算法提取匹配特征点所具有的旋转、 缩放和平移不变性的特性与DWT水印算法相结合， 根据SIFT特征点的尺度特征和坐标关系， 实现带水印图像的几何攻击参数估计和校正。结果 仿真结果表明： 提出的水印算法在受到系列旋转、 缩放和平移攻击及组合攻击后， 提取水印的NC值均大于0.8394， 说明了算法的可行性。尤其是对于抗旋转攻击， 优于其他同类或相关算法。结论 提出的算法对旋转、 缩放、 平移等3种几何攻击都具有较好的鲁棒性。 |
| 英文摘要: |
| Targeting at the poor ability of the wavelet transform domain digital watermarking algorithm against geometric attack, a wavelet domain watermarking algorithm based on matching of SIFT feature points was proposed. The rotation, scaling and translation invariant features of feature points extraction and matching by SIFT algorithm were combined with the DWT watermarking algorithm, and the parameter estimation and correction of watermarked images after geometric attack were realized according to the scale characteristics and coordinate relationship of SIFT feature points. The simulation results showed that after a series of rotation, zoom, translation and composite attacks, the NC values of extracted watermark using this watermark algorithm were all above 0.8394, demonstrating the feasibility of the algorithm. Especially, this algorithm was superior to other similar or related algorithms in the resistance to rotation attacks. In conclusion, this algorithm was robust to the three kinds of geometric attacks including rotation, zoom and translation. |
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