JPEG-Compatibility Steganalysis that Distinguishes Embedding Changes from Recompression Artifacts  

作　　者：MA Xiaojing LIU Jiaojiao ZOU Deqing JIN Hai 

机构地区：[1]Key Laboratory of Services Computing Technology and System, Ministry of EducationSchool of Computer Science and Technology, Huazhong University of Science and Technology Wuhan 430000 Hubei Province, P.R. China

出　　处：《China Communications》2014年第9期173-182,共10页中国通信（英文版）

基　　金：This work was supported in part by National Natural Science Foundation of China，National 973 Basic Research Program of China，the Fundamental Research Funds for the Central Universities,HUST

摘　　要：JPEG-Compatibility steganalysis detects the presence of secret message embedded in the JPEG decompressed images and estimates the embedding rate. We propose a JPEG-Compatibility steganalysis algorithm that estimates the embedding rate based on the difference between the stego image and its recompression based predicted co-vet image. In particular, compression artifacts and embedding changes are distinguished based on the amplitude of pixel value changes. This is done independent of the embedding positions, thus is effective for both content non-adaptive and content adaptive steganography. In addition, we also improve the recompression prediction scheme to more accurately estimate the JPEG quantization table. Experimental results show that the proposed algorithm is significantly more effective in detecting spatial ±1 steganography across a wide range of quality factors and embedding rates, when compared to the previous works.JPEG-Compatibility steganalysis detects the presence of secret message embedded in the JPEG decompressed images and estimates the embedding rate.We propose a JPEG-Compatibility steganalysis algorithm that estimates the embedding rate based on the difference between the stego image and its recompression based predicted cover image.In particular,compression artifacts and embedding changes are distinguished based on the amplitude of pixel value changes.This is done independent of the embedding positions,thus is effective for both content non-adaptive and content adaptive steganography.In addition,we also improve the recompression prediction scheme to more accurately estimate the JPEG quantization table.Experimental results show that the proposed algorithm is significantly more effective in detecting spatial ±1 steganography across a wide range of quality factors and embedding rates,when compared to the previous works.

关 键 词：STEGANALYSIS JPEG-compatibility recompression artifacts 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN919.81[自动化与计算机技术—计算机科学与技术]