摘要： 传统的数字图像置乱算法需要多次迭代，加密强度不高，密钥空间小，抗攻击能力弱。针对上述问题，基于多组混沌序列和矩阵拉直算子，提出一种新的图像置乱算法。通过对彩色数字图像的RGB矩阵进行拉直和置乱，隐藏原始图像所含信息。理论分析和实验结果表明，该算法具有较大的密钥空间，对密钥敏感，能改变图像的灰度特征，且置乱后的图像纹理细、颗粒均匀。
关键词:
数字图像,
置乱算法,
混沌序列,
矩阵拉直算子,
排列变换,
RGB矩阵
Abstract: There are some problems in classical image scrambling algorithms such as needing many iterations, insufficient strength of encryption, little key space and weak resistance. Based on multi-group chaotic sequences and matrix vectorizating operator, this paper proposes a new color digital image scrambling algorithm to solve the problems. By vectorizing and scrambling the RGB matrix of color digital image, the information of original image is hidden. Theory analysis and experiment results show that the new algorithm has large key space and sensitive to the key. It can change the grey-scale feature of image, and scrambling effect is good.
Key words:
digital image,
scrambling algorithm,
chaotic sequence,
matrix vectorizing operator,
arrangement transformation,
RGB matrix
中图分类号:
段雪峰, 关健, 丁勇, 刘云波. 基于多组混沌序列的彩色数字图像置乱算法[J]. 计算机工程, 2012, 38(9): 114-116,120.
DUAN Xue-Feng, GUAN Jian, DING Yong, LIU Yun-Bei. Color Digital Image Scrambling Algorithm Based on Multi-group Chaotic Sequences[J]. Computer Engineering, 2012, 38(9): 114-116,120.