(北京郵電大學計算機學院,北京 100876)
摘 要 詳細介紹了一種基于JPEG圖像的隱寫檢測算法——馬氏檢測,分析了馬氏檢測相對于其他多種隱寫分析算法具有更高的檢測精度,并在此基礎上提出兩種改進方法,實驗結果表明,改進后的馬氏檢測對于各種隱寫算法如LSB、COX、F5嵌入后的圖像可以具有更高的檢測正確率。
關鍵詞 馬氏檢測;JPEG圖像;二階統計;正確率;支持向量機
Research and Improvement on Markov Steganalysis
Mengjiao LI, Shaozhang NIU, Peng ZHANG
(School of Computer, Beijing University of Posts and Telecommunications, Beijing, China)
Abstract A steganalysis algorithm on JPEG images - Markov steganalysis is introduced, analysis of its higher detection accuracy rate relative to a variety of other steganalysis algorithms, and on this basis we propose two methods to improve the algorithm. The experiment results show that the improved Markov steganalysis has higher detection accuracy rate for many steganography algorithms such as LSB, COX and F5.
Key words Markov steganalysis; JPEG image; second order statistic; accuracy rate ;SVM
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