%0 Journal Article
%T A RST-invariant Robust DWT-HMM Watermarking AlgorithmIncorporating Zernike Moment and Template<br>结合Zernike矩和模板具有RST不变性的DWT-HMM鲁棒水印算法
%A WANG Chun-tao
%A NI Jiang-qun
%A HUANG Ji-wu
%A ZHANG Rong-yue
%A <br>王春桃
%A 倪江群
%A 黄继武
%A 张荣跃
%J 中国图象图形学报
%D 2008
%I 
%X One of the key issues for robust watermarking is to resist geometrical attacks.A matching strategy from coarse to fine scale to achieve the geometrical synchronization incorporating Zernike moments and the template in wavelet domain is proposed.At the coarse stage,the rotation and scaling parameters are estimated with the Zernike moments of the translation-normalized image,while the translation parameters are estimated with the centroid's increments between the original image and the image that are corrected for rotation and scaling.At the fine stage,the accurate values of rotation,scaling,and translation(RST)are obtained by matching the template around the roughly estimated RST values,which hence reduces the searching spaces to some extent.Finally,the attacked image is corrected with the accurate RST values.A watermarking scheme based on the vector Hidden Markov Model in wavelet domain(DWT-HMM)is also adopted.Good robustness is observed against StirMark attacks and their joint attacks.
%K digital Watermarking
%K Zernike Moments
%K geometric Distortion
%K robustness
%K DWT-HMM
%K template<br>数字水印
%K Zernike矩
%K 几何变形
%K 鲁棒性
%K 小波域隐马尔可夫模型
%K 模板
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D06194629680C940ACE75262F54B9D85&aid=EECEE67203D954A2362105A0304D7632&yid=67289AFF6305E306&vid=FC0714F8D2EB605D&iid=DF92D298D3FF1E6E&sid=49833082E2634437&eid=FD947B5A26542F64&journal_id=1006-8961&journal_name=中国图象图形学报&referenced_num=1&reference_num=18