%0 Journal Article
%T Algorithm and Implementation of Digital Watermarking Based on Improved SVD<br>一种基于改进型奇异值分解的数字水印算法及实现
%A ZHU Xin-zhong
%A XU Hui-ying
%A ZHAO Jian-min
%A <br>朱信忠
%A 徐慧英
%A 赵建民
%J 计算机应用研究
%D 2006
%I 
%X Digital watermarking is a potential technology,which can solve the problem of multimedia copyright protection etc.An algorithm based on SVD is robust against image distortion.But based on SVD,along with the enlarging of its size,more time will be spent in computing the SVs,and experiments show that the distortion in the diagonal direction is conspicuous,due to the calculation error,so we present a watermarking algorithm based on Block-SVD.In this method,the original image is divided into several blocks and we improve on watermark to add distortion compensation.Experimental results show that the watermarking algorithm performs well in robustness.At last the method based on Block-SVD is compared to the traditional Cox method,which also shows that the new method is very robust.
%K Digital Watermarking
%K SVD
%K Robustness
%K Block-SVD
%K Distortion Compensation<br>数字水印
%K 奇异值分解
%K 鲁棒性
%K 分块奇异值分解
%K 失真补偿
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=9D5BC770AAE737AC&yid=37904DC365DD7266&vid=EA389574707BDED3&iid=59906B3B2830C2C5&sid=C6EC7357BCACD3A4&eid=2E01F39B6CBD53DE&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=5&reference_num=7