计算机应用与软件Issue(11)：307-311,5.DOI:10.3969/j.issn.1000-386x.2014.11.078
一种基于图像特征的彩色图像水印算法
A COLOUR IMAGE WATERMARKING ALGORITHM BASED ON IMAGE FEATURES
摘要
Abstract
To improve the ability of watermarking algorithm in resisting geometrical attacks, we propose an image feature-based watermarking algorithm for colour images.First, it uses Speed Up Robust Features ( SURF) algorithm to extract steady feature points in the image, and constitutes SURF feature description operator for it, which makes the extracted feature points have scale invariance;Secondly, it obtains local feature region according to the adaptivity of the feature scale and normalises it;Then the algorithm applies slant transformation on local feature region, and gets the frequency coefficient in it; Finally, it completes the watermark embedding by combining singular value decomposition (SVD) algorithm.Experimental results show that the image with the watermark embedded still has higher similarity of its extracted watermark to the original one’ s after suffering the noise and geometrical attacks, this algorithm has quite good robustness.关键词
数字水印/SURF特征点/斜变换/奇异值分解/几何攻击Key words
Digital watermark/SURF feature point/Slant transformation/Singular value decomposition/Geometrical attack分类
信息技术与安全科学引用本文复制引用
史宝明,贺元香,萧萍,李岚..一种基于图像特征的彩色图像水印算法[J].计算机应用与软件,2014,(11):307-311,5.基金项目
甘肃省教育厅基金项目（1113－01）；甘肃联合大学科研能力提升计划项目（2012YBTS05）。 （）
