山东农业大学学报（自然科学版）2011，Vol.42Issue(1)：111-122,12.
一种抗几何攻击的图像水印算法
AN IMAGE WATERMARKING ALGORITHM ROBUST TO GEOMETRIC ATTACKS
摘要
Abstract
Geometric attacks can effectively destroy the watermark signal synchronization, it has been the practicality constraints of digital watermarking technique. In this paper we analyze the real cause of geometric attacks undermining watermark signal synchronization, and propose a novel image watermarking extracting algorithm based on the relationship between centroid and affine transform. The algorithm does not apply the traditional image normalization technique, so it guarantees watermarked image high transparency, that is to ensure high quality of watermarked image. The use of this algorithm can effectively extract the watermark from the watermarked images which have been suffered some geometric attacks such as rotation, scaling, translation, aspect ratio change and their joint attacks. The experimental results show that the algorithm on a variety of geometric attacks are highly robust.关键词
数字水印/小波变换/图心/几何攻击Key words
digital watermarking/ wavelet transform/ centroid/ geometric attacks分类
信息技术与安全科学引用本文复制引用
朱莉莉,门志梅,侯迎坤..一种抗几何攻击的图像水印算法[J].山东农业大学学报（自然科学版）,2011,42(1):111-122,12.基金项目
山东省自然科学基金项目(Q2006A04) （Q2006A04）
