Research And Implement Of Loss Prevention System Based On Video

With the development of social economy,the scale of retail enterprises and chain supermarkets expands rap idly, the following problem is the loss rate of goods increased, The loss prevention work has been faced a serious challenge at present. Streaming media technology plays an increasingly important role in security monitoring field. Now many enterprises continue to increase investment in loss prevention work, and the technology in loss prevention have been gradually concerned by them Therefore, develop a loss prevention system based on video is of great practical significance.This thesis first introduces the development of video monitor and streaming media techno logy,and then consider the actual loss prevention demands of retail enterprises ,clear the system functional and non-functional requirements; On this basis identified the system general structure, and give detailed design about each module function of this system? network communication interface?the database which related to;For the main components of the system module——transfer-server?streaming media server?message center server?Web client,describe their main data structure and implementation process in detail;Finally,the system function and performance have been tested comprehensively. For the sole function?install and deployment bother etc. problem of traditional video monitoring software, this thesis put forward a new method which combined video monitor with abnormal events alarm,uses IOCP to act as the fundamentals of data interaction between each module.For the transmission of video stream, this thesis use MPEG-DASH.HTML5 and MSE technology to realize video cross-platform play,users do not need to install other separate clients or plug-ins.For the handling of large number of abnormal events,this thesis adopts dynamic load DLL technology to achieve server load balancing,use database connection pool which implemented with thread pool techniques to complete the access of abnormal events,and optimize database access efficiency.The loss prevention system based on video which we developed in this thesis has been put into operation in a retail enterprise.lt has improved the work efficiency of loss prevention guard,and reduced the loss rate of goods.