基于改进的Logistic映射和DNA编码的图像隐写  

Image Steganography Based on Improved Logistic Map and DNA Encoding

作　　者：孙树亮[1] 赵子华[2] 

机构地区：[1]福建师范大学福清分校电子与信息工程学院,福建福清350300 [2]福建师范大学福清分校财务处,福建福清350300

出　　处：《福建师大福清分校学报》2017年第2期14-18,36,共6页Journal of Fuqing Branch of Fujian Normal University

基　　金：福建省科技厅基金资助项目(2016J05153)

摘　　要：论文在改进的Logistic映射和DNA编码的基础上,提出了一种新的图像隐藏算法。首先分析了改进的Logistic映射的特点,然后用其生产混沌序列。秘密信息首先转化为二值矩阵,然后随机选择一种DNA编码方法进行编码。根据随机序列,把DNA矩阵变成新的DNA序列。用Canny边缘检测算法求取载体图像的边缘,最后用两位秘密信息替换边缘图像的最低2位。实验结果表明,与其他方法相比,本文提出方法具有更好的PSNR和IF值。In this paper a secure steganography algorithm is proposed based on improved Logistic map and DNA sequence. The characteristics of the improved logistic map is analyzed and is employed to produce the chaotic sequence. The secret bits are converted into dual-value matrix at first and the original matrix is encoded with one of encoding rules. DNA encoded matrix is converted to 1-D bit streams and 1-D binary bit streams are scrambled with pseudo-random number. Canny edge detector is employed to detect the edge pixels of cover image. 2 secret bits are embedded in edge pixels of host image. The experiments show that the proposed scheme is superior to other schemes in PSNR and IF values.

关 键 词：改进的Logistic映射 DNA编码 CANNY边缘检测 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]