基于边缘匹配和模函数的安全密写算法  

Secure Steganographic Algorithm Based on Side Match and Modular Function

作　　者：廖琪男[1] 

机构地区：[1]广西财经学院计算机与信息管理系,广西南宁530003

出　　处：《电子学报》2012年第10期2002-2008,共7页Acta Electronica Sinica

基　　金：广西教育厅科研项目(No.201106LX747)

摘　　要：为了提供较大的可调信息嵌入量和保持载密图像良好的视觉质量,提出一种新的密写算法.根据人类视觉特性,利用像素的3个相邻像素的最大像素值与最小像素值的差值,将图像分为平滑区、过渡区和边缘区;根据模数循环的特点,应用具有安全特性的模函数以某一嵌入方案在3个区域中的像素自适应地嵌入不同的信息比特数.选择不同的嵌入方案可以得到不同的嵌入量和载密图像视觉质量.实验结果表明,本文算法在保持高嵌入率的同时仍保持较好的载密图像视觉质量,且安全性好.To provide a large,scalable embedding capacity and maintain a good visual quality of stego-image,this paper pre sents a novel steganography. According to human visual characteristic, the algorithm divides an image into smooth area, transition area, and edged area by the difference between the maximum pixel value and the minimum pixel value of 3 neighboring pixels; ac cording to the characteristics of the module cycle,it uses modulus function with security features to adaptively embed different bits information into a pixel in 3 different areas with one of the embedding schemes. Different embedding scheme gets different rates of embedding and visual quality of stego-image. Experirnental results show that the algorithm can maintain a high embedding rate while maintaining good visual quality of stego-image, and good security.

关 键 词：信息隐藏 边缘匹配 像素差值 模函数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]