基于Logistic混沌加密的NSCT-DWT-SVD彩色水印算法  

NSCT-DWT-SVD color watermarking algorithm based on Logistic chaotic encryption

作　　者：马婷[1] 陈农田[2] 

机构地区：[1]中国民用航空飞行学院计算机学院,四川广汉618307 [2]中国民用航空飞行学院航空工程学院,四川广汉618307

出　　处：《现代电子技术》2016年第10期37-41,共5页Modern Electronics Technique

基　　金：国家自然基金项目(60879022);中国民航飞行学院青年基金项目(Q2013-045)

摘　　要：提出基于Logistic混沌映射加密与NSCT-DWT-SVD结合的关于YUV复合数字水印算法。首先将RGB载体图像转换成YUV彩色模型图像,提取Y分量进行非采样Contourlet变换(NSCT)。将产生的低频子带进行小波变换,并对小波变换的低频系数进行奇异值分解(SVD),然后对水印信息进行Logistic混沌映射加密,确定嵌入强度,将加密的水印信息叠加到彩色图像的奇异值上。仿真实验表明,该算法在保证水印嵌入信息量的前提下,满足水印信息的隐蔽性,同时该算法对常规攻击的稳健性较强,尤其是抵抗旋转攻击和JPEG压缩攻击时,仍能提取出较清晰的水印图像。The compound digital watermarking algorithm related to YUV based on combination of Logistic chaotic mapping encryption and NSCT-DWT-SVD is proposed. The RGB carrier image is converted into YUV color model image,and then the Y component is extracted to perform NSCT. The wavelet transform for the produced low-frequency sub-band is conducted,and then SVD is performed for low-frequency coefficient of the wavelet transform. After that the Logistic chaotic mapping encryption for watermark information is carried out to determine the embedding strength,and superimpose the encrypted watermarking information on the singular value of a color image. The simulation experiment results show that the algorithm can meet the concealment demand of watermark information on the premise of ensuring the amount of watermarking embedding information. Meanwhile,the algorithm has strong robustness to resist common attack. Especially while the algorithm is resisting the rotation attack and JPEG compression attack,it still can extract the clear watermarking image.

关 键 词：Logistic混沌映射加密 YUV DWT NSCT SVD 多重数字水印算法 

分 类 号：TN911.73[电子电信—通信与信息系统] TP391.41[电子电信—信息与通信工程]