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| Digital Video Steganalysis Algorithm Based on Motion Estimation |
| SUN Yi-Feng1,2,LIU Fen-Lin1 |
Institute of Information Engineering,PLA Information Engineering University,Zhengzhou 450002
Institute of Electronic Technology,PLA Information Engineering University,Zhengzhou 450004 |
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Abstract A motion estimation based video steganalysis algorithm is proposed. The effect of information embedding on video motion estimation is investigated by the change of block mean square errors. The motion vectors are sensitive to information embedding, and the sensitivity increases with the decrease of the block size. The motion vector fields which reflect the time-variable characteristic of videos are used as the representation of video data in detecting stego-video. Firstly, a block size is given, and the motion vector fields are obtained by the minimum mean square error block matched motion estimation algorithm. Then the co-occurrence matrixes of three directional adjacent elements in the motions vector fields are calculated. The main diagonal elements and their neighbors of the co-occurrence matrixes are selected as the features. The support vector machine is adopted as the classifier. The experimental results show that the performance of the proposed algorithm is better compared with that of Budhia algorithm.
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Received: 26 June 2009
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2010, Vol. 23 
