基于中心与邻域像素均值关系隐写算法  

Algorithm Based on Relation of Middle DCT and Average of Neighboring DCT Coefficients

作　　者：刘智[1] 

机构地区：[1]广西工学院计算机系,广西柳州545006

出　　处：《计算机仿真》2011年第3期317-320,共4页Computer Simulation

基　　金：广西教育厅科研项目(200707MS064);广西工学院青年科学基金项目(院科自0840206)

摘　　要：研究了图像隐写术的问题。针对保护知识产权,应有有效的图像隐写术。为了获得更好抗压缩性能,提出了离散余弦变换(DCT)变换域的中心系数与邻域系数均值关系的新算法。方法能够得到更高的抗有损压缩能力,利用了频域隐藏法比较好的抗攻击性能,在JPEG压缩情况下也能做到高效准确的提取,并进行仿真。仿真结果证明应用改进的算法所做得到的图像具有更高的PSNR值,具有更强的抗JPEG压缩性能,更好的抗噪声性能,能够在较低的JPEG压缩情况下高效准确无误地提取信息,符合Internet上传送图像的要求,证明是一种安全有效的方法。This paper researches the method of image steganography problem.In order to obtain better performance to resist the compression,we develop the algorithm based on the relation of center pixels and the mean of neighboring pixels of frequency domain.We propose a new information hiding technique in frequency domain,which is based on the relation of the middle DCT coefficient and average of neighboring DCT coefficients.We make use of the relation of DCT arithmetic to enhance the capability of tolerating the destruction of lossy compression.We make use of the virtue of frequency technique which can tolerate the attack.Simulation results prove that the algorithm has improved the images and has higher PSNR value,stronger anti-JPEG compression performance and better anti-noise performance.The proposed new technique tallies with the transmitted images on internet and it is a secure and efficient method.

关 键 词：信息隐藏 中心系数 像素均值 离散余弦变换系数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]