Research On Video Surveillance System With 3G Mobile Phone

During past six decades, video surveillance systems, using closed circuit television (CCTV), has undergone various technological advances. Indeed, the video surveillance provides a solid physical and logical fundamental security in many fields of daily life. Nowadays, video surveillance is increasingly based on new technologies of information and communication. It is possible to implement a video surveillance system based on 3G networks, because the technology of 3G has been developed.The system mainly includes three functions, which are monitoring, video acquisition and transmission, and intrusion detection. The last one is the most important. In this thesis, a 3G mobile phone based video surveillance system was designed and implemented. The main contributions are as follows.1) An Overview of surveillance systems is givenBased on analysis of existing surveillance systems, evolution of the systems is given, and main elements of an intelligent system are listed out. An intelligent system needs supports from technologies of communication, computer, image processing, and even robot vision.2) A video surveillance system based on 3G mobile phone is designedThe designed system has the features of mobility, intelligence and real time. It contains six parts, which are management module, module of input and output, coding and compression module, communication module, database, and intrusion detection module.3) An intrusion detection algorithm is proposedAfter analyzing algorithms based on differences between current image and background, an intrusion detection algorithm based on adaptive Gaussian mixture model is proposed, and the background can be adaptively changed. According to the experiment results, the algorithm works well.4) A video surveillance system based on 3G mobile phone is implementedBased on the design of a system and algorithm, a 3G mobile phone based video surveillance system is implemented under the developing environment of Microsoft.net 2003, and SQL server is used to manage relevant database. The tests have shown that each module of the system can converge to the expected requirements and has the performance of mobility, intelligence and real time.