以分形图形为载体的信息隐藏算法  

Information hiding algorithm based on fractal graph

作　　者：柏森 周龙福 阳溢 李静 季晓勇 BAI Sen1,2, ZHOU Longhu1, YANG Yi2, LI Jing1, JI Xiaoyong3(1. School of Software and Computer, Chongqing Institute of Engineering, Chongqing 400056, China; 2. Department of Information Engineering, Academy of the Army Engineering University of PLA, Chongqing 400035, China ; 3. Unit 63981 of PLA, Wuhan Hubei 430300, Chin)

机构地区：[1]重庆工程学院软件与计算机学院 [2]陆军工程大学通信士官学校信息工程系 [3]63981部队

出　　处：《计算机应用》2018年第8期2306-2310,共5页journal of Computer Applications

基　　金：重庆市基础与前沿研究计划专项(cstc2013jj B40009);重庆市高校创新团队建设计划项目(CXTDX201601043)~~

摘　　要：针对现有信息隐藏提取得不到原始载体图像使提取困难、隐藏容量高又易被隐密分析攻破的问题,提出以分形图形为载体的信息隐藏方法。首先,利用数学仿射变换及分形迭代函数系统生成黑白的分形图形(BWFG);然后,根据坐标变换的思想,将分形图形转化为黑白像素图像(BWPI);最后,将像素图像分成不重叠的小块,通过调整小块内黑白像素的位置来隐藏秘密信息,形成含密图像。知道仿射变换参数及迭代次数的秘密信息接收方,首先生成原始载体分形图像,然后通过对比两幅图像相应小块黑白像素差异,即可提取隐藏的秘密信息。理论分析和仿真实验表明,与频率域信息隐藏算法相比,提出的算法隐蔽性强、隐藏容量高,能抵抗基于图像特征和变换域系数变化的隐密分析。For the existing steganography,it is hard to extract secret information without original cover-image and easy to be detected by steganalysts when the hiding capacity is high. To solve this problem,a new scheme of steganography based on fractal graph was proposed. In this scheme,firstly,Black-and-White Fractal Graph（ BWFG） was created by utilizing affine transformation and fractal iterated function system. Then the BWFG was transformed to Black-and-White Pixel Image（ BWPI）based on the idea of coordinate transformation. At last,the BWPI was divided into several non-overlapping blocks and the positions of black and white pixels in each block were altered to hide the secret information,generating stego-image. The receiver could create the cover-image by utilizing the parameters of affine transformation and times of iteration,and extract secret information by comparing the difference of pixels in corresponding blocks. Theoretical analysis and simulation experiments show that,compared with the information hiding algorithm in frequency domain,the proposed scheme has good imperceptibility and high hiding capacity,and can resist steganalysis based on image features and transform domain coefficient change.

关 键 词：分形图形 信息隐藏 隐蔽性 隐藏容量 隐密分析 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]