混沌加密和NSCT图像数字水印算法研究  

Research on Image Watermarking Algorithm Using Chaotic Encryption and NSCT

作　　者：颜飞[1] 柏逢明[1] 李永哲[2] 

机构地区：[1]长春理工大学电子信息工程学院,长春130022 [2]哈尔滨工业大学,哈尔滨150006

出　　处：《长春理工大学学报（自然科学版）》2011年第4期133-136,166,共5页Journal of Changchun University of Science and Technology(Natural Science Edition)

摘　　要：以非抽样Contourlet变换(NSCT)为基础,提出了一种新的抗攻击的鲁棒数字水印算法。使用混沌置乱和混沌加密处理水印信息,增强数字水印的安全性,同时提升了水印抗剪切等攻击的能力。将水印按照规则嵌入NSCT的低频子带,水印的不可见性和鲁棒性得到了较好的平衡。实验结果表明,本文提出的方法具有较好的安全性、鲁棒性和不可见性,能够有效地抵抗JPEG压缩、滤波、剪切等攻击。A new robustness image watermarking algorithm based on chaotic encryption and nonsubsampled contourlet transform（NSCT） is proposed.Scrambling and encrypting the watermarking information using chaos to enhance the security of digital watermarking,while the anti-attack ability of shear and other attacks is improved.The watermarking embedded in low-frequency subband of NSCT by the rules,and the invisibility and robustness of watermarking embedded was good balance.The experimental results show that the algorithm proposed in this paper has good security,robustness and invisibility,and it can effectively resist the JPEG compression,filtering,cropping and other attacks.

关 键 词：NSCT 数字水印 混沌置乱 混沌加密 信息安全 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构] TP391[自动化与计算机技术—计算机科学与技术]