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As a prerequisite technique, Deep Packet Inspection (DPI) plays a major role to contemporary network security and management. The key of DPI is a repository of protocol fingerprints. However, inferring and maintaining up-to-date fingerprints for various and new protocols is very difficult in order to adapt them to the continuous evolution of the protocols. In this paper, we propose ProDigger, a robust...
Object tracking is always in the core status with the develop of robotics. In this paper, we proposed a novel tracking framework based on Spatio-Temporal Context tracking (STC) and Template-Matching algorithm(TM). STC tracking method is a fast and simplified tracking method that strongly dependent on the context region (the surrounding background of the target). Therefore, it cannot correct the tracking...
The paper presents an approach towards tracking and recognizing a set of predefined hand gestures from monocular image sequences. Firstly, a behavioral model of basic hand postures was depicted by mathematical expressions. Secondly, a behavioral model for hand posture tracking and hand posture tracking algorithm based on the behavioral model of hand postures were proposed. Finally, the proposed algorithm...
Visual object tracking is a fundamental research topic in computer vision. In this paper, we proposed a novel hybrid tracking method based on Pulse Coupled Neural Network (PCNN) and Multiple Instance Learning (MIL). Most modern trackers may be inaccurate when the training samples are imprecise which causes drift. To resolve these problems, MIL method is introduced into the tracking task, which can...
Image representations using code words from a visual dictionary are widely applied in object detection and categorization. Traditionally, there are two types of methods to construct a dictionary: k-means and optimization-based method. The former cannot achieve a good discriminability because it extracts too many background features. The latter needs to cooperate with coding methods and brings about...
The mutual exclusion of roles as an effective means of implementing separation of duty, has an important role on access control in RBAC systems. This paper deeply discusses the types that the mutual exclusion of roles come from, and puts forward a model of describing mutual exclusion of roles. The model is similar to the structure of adjacency multiple table, and its basic unit is the role structure...
The joint flexibility is an important issue in the conceptual design of car bodies. In the paper, semi-rigid connection is used to represent the compliant behavior of multi-branch flexible joints. The simplified joint model is established based on rigid beams and semi-rigid connection. And we adopt compliance method to solve the parameters of the model. Numerical example proved the accuracy of the...
Particle filter (PF) is widely used in nonlinear/non-Gaussion environments to solve the simultaneous localization and mapping (SLAM) problem. But the standard PF suffers a lot from the sample impoverishment after resampling. This paper introduces a particle splitting technique before the resampling process, called pre-resampling. This method splits particles with big importance weight into several...
This paper proposes a novel approach for word similarity computation based on word sense vectors. The word sense vector is built using HIT-IR Tongyici Cilin (extended) for concept generalization and is further modified by the use of relative and absolute frequency filters. Experiments show that the approach not only overcomes the problem of similarity computation of unseen words but also yields a...
Recognition system based on skin color is main method of character detection of face and hand. This paper analyzed some common method of transformation of image enhance on the basis of YCbCr skin color model. A enhance method which is integrated exponential and logarithm transformation is proposed. And according to the shortcoming of fixed threshold, an automatic threshold algorithm with the fisher...
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