摘要： 提出一种利用尺度不变特征变换(SIFT)特征点实现对抗几何攻击的水印方案。基于特征点构造Delaunay三角网，依靠SIFT特征点的抗几何变换性实现图像三角形区域的抗几何攻击。在提取部分图像内容的基础上，按照多对一的原则，使用改进的加性方法嵌入水印信息。实验表明，该算法能够较好地抵抗几何攻击和一般的信号处理攻击。
关键词:
数字水印,
尺度不变特征变换,
几何攻击,
Delaunay三角网
Abstract: The image watermark scheme based on Scale Invariant Feature Transform(SIFT) feature is proposed for resisting geometric attacks. The feature points are used to construct the Delaunay triangular mask, which can make the triangle to against geometric attacks based on the SIFT point’s ability of resisting geometric attacks. Watermark according the several-for-one principle is embedded in the image content using additive method. Experiments demonstrate that the algorithm can well withstand geometric attacks and usual signal processing attacks.
Key words:
digital watermark,
Scale Invariant Feature Transform(SIFT),
geometric attacks,
Delaunay triangular mask
中图分类号:
李 健;叶有培;何春梅;韩 牟. 基于SIFT特征点的抗几何攻击水印算法[J]. 计算机工程, 2009, 35(19): 170-171,.
LI Jian; YE You-pei; HE Chun-mei; HAN Mu. Watermark Algorithm Against Geometric Attacks Based on SIFT Feature Point[J]. Computer Engineering, 2009, 35(19): 170-171,.