二维耦合映象格子混沌加密彩色图像水印
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摘要
提出了一种二维耦合映象格子混沌加密的彩色图像自适应水印算法。该算法采用二维离散耦合映象格子混沌系统迭代生成加密水印。在水印嵌人过程中,把彩色图像亮度分量分成互不重叠的图像块,用分数盒维数分析各块的特征,提取特征块和次特征块,对它们分别进行一级小波分解,先将水印以不同强度自适应地嵌入到特征块的小波域低频子图中。在保证隐蔽性的前提下,再次将水印以不同强度自适应地嵌入到次特征块的小波域低频子图中。实验结果表明,该算法对JPEG压缩、加噪、剪切、滤波等具有较强的稳健性。
This paper presents a color image watermarking algorithm based on two-dimensional coupled map lattice.It uses two-dimensional coupled map lattice to generate the watermarking.An original image is divided into non-overlapped blocks, fractional box-counting dimension is used to analyze the feature of the image blocks to extract the feature blocks and secondary feature blocks and then one level DWT is used to decompose them.The different strength watermark is adaptively embedded into the low-frequency coefficients of the feature blocks,under the condition that the watermark embedded is invisible,and then is embedded into the secondary feature blocks in the same way.Experimental results demonstrate that the watermarking scheme is strongly robust to different types of attacks such as JPEG compression,noise addition,cropping,filtering and so on.
This paper presents a color image watermarking algorithm based on two-dimensional coupled map lattice.It uses two-dimensional coupled map lattice to generate the watermarking.An original image is divided into non-overlapped blocks, fractional box-counting dimension is used to analyze the feature of the image blocks to extract the feature blocks and secondary feature blocks and then one level DWT is used to decompose them.The different strength watermark is adaptively embedded into the low-frequency coefficients of the feature blocks,under the condition that the watermark embedded is invisible,and then is embedded into the secondary feature blocks in the same way.Experimental results demonstrate that the watermarking scheme is strongly robust to different types of attacks such as JPEG compression,noise addition,cropping,filtering and so on.
引文
[1]Chen G R,Mao Y B.A symmetric image encryption scheme based on3D chaotic cat maps[J].Chaos,Solitons&Fractals,2004,21(7):49-61.
[2]Chiaraluce F,Ciccarelli L.A new chaotic algorithm for video encryption[J].IEEE Trans ConsumElectron,2002,48(4):838-844.
[3]Peng Zhenui,Liu Wenbo.Color image authentication based on spatiotemporal chaos and SVD[J].Chaos,Solitons&Fractals,2008,36(6):946-952.
[4]彭军,李学明.基于耦合映象格子模型的时空混沌二值序列及其性能分析[J].计算机科学,2005(2):196-198.
[5]崔雪冰,邵国金,李国徽.一种时空混沌的图像密码[J].计算机工程与应用,2009,45(21):82-84.
[6]Shi C,Bhargara B.Light-weigh MPEG video encryption algorithm[C]//Proceeding of the International Conference on Multimedia’98,NewDelhi,India,2003:55-61.
[7]齐东旭,邹建成.一类新的置乱变换及其在图像信息隐蔽中的应用[J].中国科学,2000,30(5):440-447.
[8]姜炳强,江铭炎,赵立军.一种新的基于小波变换与混沌加密的彩色数字水印算法[J].山东大学学报,2004,34(3):68-71.
[9]陈颙,陈凌.分形几何学[M].2版.北京:地震出版社,2005:54-71.
[10]Feng J.Fractional fractal geometry for image processing[D].USA:North Western University,2000.
[11]Ni Rongrong,Ruan Qiuqi,Cheng H D.Secure semi-blind water-marking based on iteration mapping and image features[J].Pattern Recognition,2005,38:357-368.
[12]余成波.数字图像处理及MATLAB实现[M].重庆:重庆大学出版社,2003.
[13]刘英,孙丽莎.基于三维猫映射的图像加密算法[J].计算机工程与应用,2005,41(36):127-130.
[2]Chiaraluce F,Ciccarelli L.A new chaotic algorithm for video encryption[J].IEEE Trans ConsumElectron,2002,48(4):838-844.
[3]Peng Zhenui,Liu Wenbo.Color image authentication based on spatiotemporal chaos and SVD[J].Chaos,Solitons&Fractals,2008,36(6):946-952.
[4]彭军,李学明.基于耦合映象格子模型的时空混沌二值序列及其性能分析[J].计算机科学,2005(2):196-198.
[5]崔雪冰,邵国金,李国徽.一种时空混沌的图像密码[J].计算机工程与应用,2009,45(21):82-84.
[6]Shi C,Bhargara B.Light-weigh MPEG video encryption algorithm[C]//Proceeding of the International Conference on Multimedia’98,NewDelhi,India,2003:55-61.
[7]齐东旭,邹建成.一类新的置乱变换及其在图像信息隐蔽中的应用[J].中国科学,2000,30(5):440-447.
[8]姜炳强,江铭炎,赵立军.一种新的基于小波变换与混沌加密的彩色数字水印算法[J].山东大学学报,2004,34(3):68-71.
[9]陈颙,陈凌.分形几何学[M].2版.北京:地震出版社,2005:54-71.
[10]Feng J.Fractional fractal geometry for image processing[D].USA:North Western University,2000.
[11]Ni Rongrong,Ruan Qiuqi,Cheng H D.Secure semi-blind water-marking based on iteration mapping and image features[J].Pattern Recognition,2005,38:357-368.
[12]余成波.数字图像处理及MATLAB实现[M].重庆:重庆大学出版社,2003.
[13]刘英,孙丽莎.基于三维猫映射的图像加密算法[J].计算机工程与应用,2005,41(36):127-130.
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