计算机应用与软件Issue(5)：300-304,311,6.DOI:10.3969/j.issn.1000-386x.2014.05.076
基于不变质心及SIFT特征点的抗几何攻击零水印算法
ZERO-WATERMARKING ALGORITHM ROBUST TO GEOMETRIC ATTACKS BASED ON INVARIANT CENTROID AND SIFT FEATURE POINTS
摘要
Abstract
In order to effectively resist geometric attacks and achieve the copyright protection of digital products,we present a geometric correction-based digital image zero-watermarking algorithm.According to the character of image's invariant centroid that its relative position is stable before and after the geometric attacks,the algorithm selects the invariant centroid of image as the stable reference point,by combining the SIFT point farthest to this reference point,it estimates the geometric transformation parameters by the changes of the position of these two points.In order to eliminate the effect brought by slight errors,after the geometric correction,the blocks'singular value decomposition is car-ried out.The maximal singular values are extracted from each block to form a sequence,then they are transformed into a matrix after the bina-ry quantisation is applied,and the matrix is combined with the watermark to generate the zero-watermarking.Simulation experimental results show that the algorithm can effectively resist geometric attacks with high correction accuracy and strong robustness,and it can also avoid the contradiction between the invisibility and the robustness of the watermark.关键词
数字水印/几何攻击/尺度不变特征变换/奇异值分解/零水印/不变质心Key words
Digital watermarking/Geometric attacks/Scale invariant feature transform (SIFT)/Singular value decomposition (SVD)/Zero-watermarking/Invariant centroid分类
信息技术与安全科学引用本文复制引用
刘培利,谭月辉..基于不变质心及SIFT特征点的抗几何攻击零水印算法[J].计算机应用与软件,2014,(5):300-304,311,6.基金项目
河北省科技计划基金项目（05213579）。 （）
