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.
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)
关键词
小波变换
系数
隐写
位置
多级变换
wavelet transform
coefficient
steganography
location
multi - stage transformation
作者简介
[作者简介]邱志宏（1963-），男，河北保定人，柳州职业技术学院电子信息工程系副教授，主要研究方向：信息安全。
