一种抗几何攻击的数字图像水印算法的研究  

Research of A Digital Image Watermarking Algorithm of Resistant Geometrical Attacks

作　　者：赵巍[1] 祁爱华[1] 司亚迢[1] 

机构地区：[1]河北建筑工程学院

出　　处：《河北建筑工程学院学报》2009年第3期101-104,共4页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：张家口市科技局项目编号:060151

摘　　要：利用不变质心和傅立叶变换的平移性,提出了一种能够抵抗几何攻击的数字图像水印算法.该算法把图像不变质心作为原点截取一块圆形区域,对该区域进行对数极坐标变换,再作傅立叶变换,取出中频段幅值作为水印嵌入域.该算法具有较好的不可见性和鲁棒性,能同时抵抗几何攻击和信号处理攻击,是一种行之有效的图像鉴定方法.A digital image watermarking algorithm which can resist geometrical attacks is proposed by using invarirant center and translation of Fourier Transform. This algorithm uses the image＇s invariant center as origin to intercept a circular region, and uses it as the origin of log polar mapping. Then 2-D DFT is performed on the LPM image. And the amplitude of intermediate frequency is used as the watermarking imbedding domain. The algorithm has better robustness and invisibility, which can resist geometrical attacks and signal processing attacks. It is an effective method of the image identification.

关 键 词：数字图像水印 不变质心 傅立叶变换 鲁棒性 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]