认证水印中实现篡改恢复的置乱技术研究  

Scrambling technology research of achievment altered recovery in authentication watermarking

作　　者：黄良永[1] 肖德贵[2] 

机构地区：[1]柳州师范高等专科学校数学与计算机科学系,广西柳州545004 [2]湖南大学计算机与通讯学院,湖南长沙410082

出　　处：《计算机工程与设计》2010年第15期3360-3362,3366,共4页Computer Engineering and Design

基　　金：广西教育厅科研基金项目(200911MS294);广西青年科学基金项目(0832092)

摘　　要：针对图像篡改可恢复的认证水印中如何通过置乱技术提高恢复后的图像质量问题,分析可恢复的认证水印信息对置乱方法的要求,提出一种基于分块的混沌行排序置乱方法。该方法通过将水印信息进行分块,每个分块的水印信息分别进行相同的混沌行排序置乱变换,再移到对应的子块中。对比研究其他置乱算法,统计实验结果后分析表明,该方法不仅使每个像素都产生了较佳的位移,与所选择的密钥无关,具有较好的置乱性能。A method based on the sort of chaos line scrambling is mentioned,focusing on the image tampering-recovery watermark to improve the quality of images via image scrambling,and analyzing of the requirements between the resumable information of authentication watermark and the methods of image scrambling.The information of watermark is blocked into sub-blocks,which each block is transferred and move into the corresponding sub-blocks with the same sort of chaos line image scrambling.Compared with the other algorithms of image scrambling,the method not only produced a better displacement for every pixel,but also had a better performance of image scrambling with irrelevant bout the keys chosen.

关 键 词：认证水印 篡改恢复 置乱 混沌 排序 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]