Blind Video Steganalysis by Semi-Supervised Approach for Motion Vectors Based Steganography Algorithms
Subject Areas : electrical and computer engineeringJ. Mortazavi Mehrizi 1 , M. Khademi 2 , H. Sadoghi Yazdi 3
1 - Ferdosi University
2 - Ferdowsi University of Mashhad
3 - Ferdosi University
Abstract :
Supervised learning algorithms are widely used in blind video steganalysis and the cost of generating labeled data in them is high. That is why only a limited number of steganography algorithms with accessible code can be used for the training the classifier. Therefore, we cannot be sure about the effectiveness of steganalyzer in identifying non-accessible video steganography algorithms. On the other hand, using offline classification methods in the blind video steganalysis causes the learning process be time consuming and the system cannot be updated online. To solve this problem, we propose a new method for the blind video steganalysis by semi-supervised learning approach. In the proposed method, by eliminating the limitation of labeled training dataset, the classifier performance is improved for video steganography algorithms with non-accessible code. It is also proved that the proposed method, compared to common classification methods for the blind video steganalysis, has less time complexity and it is an optimal online technique. The simulation results on the standard database show that in addition to the above advantages, this method has appropriate accuracy and is comparable to common methods.
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