基于小波系数位置的隐写算法设计与实现  

The Design and Implementation of Steganography Algorithm Based on the Location of Wavelet Coefficient

作　　者：邱志宏[1] 

机构地区：[1]柳州职业技术学院电子信息工程系,广西柳州545006

出　　处：《河池学院学报》2013年第2期64-69,共6页Journal of Hechi University

基　　金：广西教育厅科研项目(201204LX584)

摘　　要：为了提高隐写算法的不可见性,提出了一种基于小波系数位置的隐写算法设计思想。利用对原始图像的多级小波变换,提取小波变换之后的频率系数。通过分析特征、系数、序对之间的大小关系,实现隐写信息的嵌入,并以小波系数的位置关系代表所嵌入的0或1特征信息。仿真测试表明,所设计的隐写算法在不可见性方面具有较优的表现。In order to improve the nonvisibility of steganography algorithm, this paper puts forwarded a steganography algorithm idea based on the location of wavelet transform coefficient. Firstly, the design makes use of the multi - level wavelet transform of the original image to extract the frequency coefficients after wavelet transform. Secondly, by analyzing the relations of characteristics, coefficients and sequences, it embeds the steganographic in- formation and uses the embedded 0 - 1 characteristics to represent the location of wavelet coefficients. At last, the design idea and implementation process of the algorithm are elaborated. Simulation test results shows that the steganography algorithm design has an optimum performance in terms of nonvisibility.

关 键 词：小波变换 系数 隐写 位置 多级变换 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]