A Method to Estimate the Steganographic Capacity in DCT Domain Based on MCUU Model  

作　　者：MAO Jiafa HUANG Yanhong NIU Xinxin XIAO Gang ZHU Linan SHENG Weiguo 

机构地区：[1]Department of Computer Science and Technology, Zhejiang University of Technology [2]Information Security Center, Beijing University of Posts and Telecommunications

出　　处：《Wuhan University Journal of Natural Sciences》2016年第4期283-290,共8页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foundation of China(61170271,61170272,61272310,61373131,61573316);Zhejiang Provincial Natural Science Foundation of China(LY15F020032,LQ12 F02016,LQ15E050006)

摘　　要：In order to estimate maximum steganographic capacity of discrete cosine transform（DCT） domain in JPEG image, this paper presents a method based on the maximize capacity under undetectable model（MCUU）. We analyze the relation between steganographic capacity and affecting factors（image size, steganography operator, loading band, embedding intensity and image complexity）. Then we design a steganography analyzer architecture and a steganographic algorithm which can dynamically increase the steganographic capacity. Compared with other methods of embedding capacity estimation in DCT domain, the proposed methods utilizes general steganalysis methods rather than one specific steganalysis technique and takes five essential factors into account, which improves the commonality and comprehensiveness of capacity estimation, respectively. The experimental results show that steganographic capacity for quantization index modulation（QIM） is almost twice that of spread spectrum（SS） based on MCUU model.In order to estimate maximum steganographic capacity of discrete cosine transform（DCT） domain in JPEG image, this paper presents a method based on the maximize capacity under undetectable model（MCUU）. We analyze the relation between steganographic capacity and affecting factors（image size, steganography operator, loading band, embedding intensity and image complexity）. Then we design a steganography analyzer architecture and a steganographic algorithm which can dynamically increase the steganographic capacity. Compared with other methods of embedding capacity estimation in DCT domain, the proposed methods utilizes general steganalysis methods rather than one specific steganalysis technique and takes five essential factors into account, which improves the commonality and comprehensiveness of capacity estimation, respectively. The experimental results show that steganographic capacity for quantization index modulation（QIM） is almost twice that of spread spectrum（SS） based on MCUU model.

关 键 词：maximize capacity under undetectable（MCUU） model steganographic capacity steganography steganalysis image complexity 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]