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For many kings of watermarking in digital image, geometric attackers are their weakness. In this paper, we present a new digital watermarking algorithm based on special area invariability of image, the experimental result show that the algorithm is transparent, and it not only can well resist such geometrical attacks as translation and rotation, but also has strong robust to the common image processing,...
As the Internet and multimedia technology develops, the content security of the multimedia has become more and more important. To distinguish various contents in the multimedia, we present an approach for automatic video classification based on combination of MPEG-7 descriptors and second-prediction strategy. In this paper, color, texture, shape and motion descriptors are extracted from five different...
This paper proposes a watermarking embedding and extracting methods in the frequency domain based on a selection of a high frequency range containing large amount of information. The selected high-frequency range contributes to the imperceptibility of the watermark while the robustness against compression is achieved because the selected frequency range contains large amount of information. The entropy-based...
We proposed a worm detection and defense system named bot-honeynet in this paper, which combines the best features of honeynet, anomaly detection and botnet. The combination of honeynet and anomaly detection system offers a tradeoff between false positive and false negative rates. The control mechanism of botnet can help our system control all the honeypots in the bot-honeynet. Bot-honeynet is designed...
At present, the biometric verification methods have attracted more and more the attention of researchers, and palm print verification as an important method, with its stable and rich features, has been widely used and highly development prospects. However,in feature extraction stage, traditional Gabor often uses fixed parameters to extract feature of all samples, which is not only a waste of a great...
Target tracking system has important application in military and civilian. In it, speed and accuracy are two important evaluations indicators. Harris algorithm is used to extract little part of target corner features which can improve this method’s speed. Then, the proposed method uses optic flow method which has high matching accuracy to match those extracted corner features in the following video...
Iterative search margin based algorithm (Simba) has been proven effective for feature selection. However, the previously proposed model does not effectively utilize the structure information hidden in data which may have a great impact on the generalization performance of post-analysis classifiers. In this paper, we introduce a novel hypothesis-margin model incorporating structure information for...
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