基于归一化和尺度不变特征的盲检测水印  

A Novel Blind Watermarking Scheme Based on Image Normalization and Feature Points Detector

作　　者：张大兴[1] 赵康[1] 刘鹏程[2] 

机构地区：[1]杭州电子科技大学图形图像研究所,浙江杭州310018 [2]绍兴文理学院元培学院信息与电子系,浙江绍兴312099

出　　处：《杭州电子科技大学学报（自然科学版）》2012年第6期61-64,共4页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(61272391)

摘　　要：该文提出一种利用图像归一化和SIFT特征点的抗几何攻击的盲水印方案,图像归一化对受到几何攻击的图片进行校正,利用图像的尺度不变特征点来保证水印的同步。嵌入时根据图像特征点构造局部特征区域,并将水印重复嵌入这些不重叠的特征区域中,检测水印时,先对图像进行归一化,再提取特征点,在局部特征区域中检测水印是否存在。实验表明,该方案具有良好的不可感知性,对常见的几何攻击是鲁棒的。This paper proposes a blind watermarking scheme for resisting geometric attacks based on image normalization and SIFT feature points.Image normalization procedure achieves invariance of the pictures that under affine geometric distortions,and the SIFT detector is used to get the steady feature points.These feature points are used to get the local feature regions that digit watermark will be embedded into.For the pictures after affine transform,we firstly do the normalization and then judge the watermark whether exist in the local feature regions.Experimental results show that the proposed scheme is not only invisible,but also robust against the general geometric attacks and common signals processing.

关 键 词：盲水印 尺度不变特征 图像归一化 抗几何攻击 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]