摘要
对非交换小波分解和重构算法进行了改进,提取出图像沿对角方向的两个低频分量与两个高频分量;提出了构造改进的Arnold变换的一种方法;利用改进的Arnold变换对非交换小波系数置乱,对置乱后的系数重构得到最终的置乱图像。扩充了密钥空间的大小,进一步增加了置乱图像的保密性。
The algorithm for decomposition and reconstruction of non-commutative wavelet is improved,two low-frequent parts and two high-frequent parts along the diagonal of image arc cxtracted.A method for constructing improved Arnold transformation is presented and used to scramble the non-commutative wavelet coefficients.The scrambled coefficients are reconstructed to get the final image.The algorithm expands the dimension of key space and increases the secrecy of the image.
出处
《计算机工程与应用》
CSCD
北大核心
2006年第35期74-76,共3页
Computer Engineering and Applications
基金
河北省自然科学基金资助项目(A2004000001)。
关键词
图像置乱
信息隐藏
非交换小波
ARNOLD置乱
image scrambling
information hiding
non commutative wavelet
Arnold scrambling
