摘要
综述了抗几何攻击的水印技术的研究现状,并提出了一个基于小波变换的有意义图像水印算法.该算法具有如下特点:(1)应用BCH编码和二维交织技术,具有纠正随机错误和突发错误的能力;(2)应用图像配准技术,能够抵抗旋转、缩放和平移(RST);(3)在512×512×8bits的图像中隐藏高达536bits的信息.实验结果表明:该算法所隐藏的水印不但可以对抗一般的信号处理,还可以抵抗RST、改变长宽比、小尺寸裁剪、随机去行去列和伴随裁剪的旋转等几何攻击.相对于目前的一些水印算法,本文算法具有隐藏数据量大和更好的特别是对抗几何攻击的稳健性等优点.
Reviews on watermarking against geom etric distortion were given, and proposed a robust watermarking algorithm agains t geometric distortion in DWT domain was proposed in this paper. The features of the proposed algorithm inclued: (1) applications of BCH coding and 2-D interle aving technology in order to correct some random errors an d burst errors in detection; (2) applications of image registration against ro tation, scaling and translation(RST) distortion; (3) hided data as many as 536 bits in 512×512×8 bits images. The experimental results showed that the water marks generated with the proposed algorithm are robust against the common signal processing procedures, RST, and some attacks of StirMark, such as aspect ratio variation, cropping, jitte,r etc. Compared with other watermarking algorithms re ported in the literatures, this watermarking algorithm is more robust, while hav ing much higher bit rate.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2003年第4期386-392,共7页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(60133020
60172067)
国家863计划资助项目(2002AA144060)
广东省自然科学基金重点项目(013164)
中国博士后基金资助项目(2002032243).
