一种新的基于图像复杂度的掩密分析技术  

A New Steganalysis Technique Based on Image Complexity

作　　者：田伟[1] 陈丹[1] 王育民[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071

出　　处：《情报指挥控制系统与仿真技术》2005年第4期89-93,共5页Information Command Control System and Simulation Technology

摘　　要：基于掩密图像与原始图像在图像复杂度上的差异,提出了一种新的针对图像LSB嵌入的掩密分析算法,通过分析待检图像在嵌入测试消息前后图像复杂度均值和方差的变化情况,利用Fisher判决准则,从而准确判断图像中是否嵌入了秘密消息。实验结果表明,文章所提算法不仅能准确检测顺序LSB嵌入,并且能估计出嵌入消息的长度,而且能够以98%的准确率检测随机LSB嵌入,同时具有实现简单,运行速度快等优点。Based on the difference of image complexity between original images and stego ones, this paper proposes a new technique for detecting least significant bit （LSB） embedding in digital images. By analyzing the change of mean value and square error of image complexity after a test message is embedded, the technique can find their thresholds and then decides accurately whether there is a secret message in an image, Experimental results show that the technique can not only detect sequential LSB embedding and estimate the embedded message＇s length, but also detect spread LSB embedding with an accuracy of 98%, Furthermore, it is simple and fast.

关 键 词：信息隐藏 掩密术 掩密分析技术 图像复杂度 

分 类 号：TN918[电子电信—通信与信息系统]