| With the development of wireless communication technology and the embedded system, the solutions of vehicle video surveillance system are gradually transit to the direction of the networkization platformization and intelligentized from single-vehicle video recording. That wireless network bandwidth multiplied can meet transmission needs of the high frame rate and high quality surveillance video, therefore, timely data exchanging between monitoring center and the vehicle terminal is achieved.Taking bus video surveillance as application background, the implementation of terminal equipment for bus multi-channel video surveillance system is researched by choosing DM365DVR as the development platform in this paper. The major works are as follows: Firstly, based on the study of DM365DVR's hardware resources and software architecture, the development board is expanded in the hardware, which can supports WLAN and 3G network to meet the demand for wireless data transmission. SATA hard disk is installed and configured, software and hardware development environment is built at last.Secondly, we implement initially the basic functions of teminal equipment for bus multi-channel video surveillance system according to the hardware configuration and software support of the development board.Thirdly, the simple research and experiments of video content analysis are carried out: camera tampering detection algorithm is designed on the basis of in-depth study on corner features; Moreover, passengers counting algorithm based on objects segmentation is proposed. Finally, multi-channel video surveillance system for bus is tested, meanwhile, the video analysis algorithm we proposed is simulated, and some analysis of experiments is provided.The experimental results demonstrate multi-channel video surveillance system for bus supporting C/S and B/S system structure can achieve multi-channel video transmission and data exchange in 3G networks. And vehicle video surveillance system supports local hard disk backup of surveillance video, downloading by WLAN and management of the backup video. Surveillance system has a stable performance, which can meet practical needs. Simulation results show camera tampering detection and passengers counting algorithm is feasible and practical. This paper summarizes all the works at last and points out the problems which are needed to further be solved or improved. |
PDF Full Text Request