J4

• • 上一篇    下一篇

正交变换在图像置乱中的应用

郭蔚, 马辉   

  1. 河北工业大学理学院, 天津 300130
  • 收稿日期:2003-06-02 修回日期:1900-01-01 出版日期:2003-10-26 发布日期:2003-10-26
  • 通讯作者: 郭尉

Application of Orthogonal Transformation in Image Manipulation

GUO Wei, MA Hui   

  1. College of Sciences, Hebei University of Technology, Tianjin 300130, China
  • Received:2003-06-02 Revised:1900-01-01 Online:2003-10-26 Published:2003-10-26
  • Contact: GUO Wei

摘要: 采用Fourier变换和离散余弦变换(正交变换)对图像进行分解, 得到图像在频域上的表示, 对频域空间上的系数进行变换, 从而实现了图像的信息隐藏. 从实验结果可以看出, 这样的信息隐藏, 对攻击者更具有迷惑性和隐蔽性.

关键词: Fourier变换, 快速Fourier变换, 离散余弦变换, 蝶形算法, 图像能量

Abstract: An image is decomposed into a multifrequency channel representation by means of a set of Fourier transformation or discrete consine tra nsformation(DCT) base. We got the data of the image on the frequency space, and transformed these modulus so as to realize the obscurity of the image’s data. F rom the results, we have found out that such obscurity of information is obscure and puzzling to aggressors.

Key words: Fourier transformation, fast Fourier transformation, discrete consine transformation, butterfly arithmetic, image energy

中图分类号: 

  • TN919.81