The Research Of Video Controller Based On BACnet

As an open data communication protocol for building automation control networks, BACnet's prime purpose is to provide an interoperation method for building automation control system. This is a good solution to for the integration of different manufacturers'devices. It is used widely in many countries .However, All standard objects and services defined in BACnet are not sufficient for completing video surveillance and control functions.Thus introducing the video point object model into BACnet and applying it to the video surveillance system will promote the development of intelligent buildings, and the video surveillance system will also play a greater role in the BACnet network focuseing on interoperability between equipments.Firstly,the structure of intelligent home system based on BACnet is analyzed. After the brief introduction of video surveillance system history,the importance of applying the video surveillance system based on BACnet to smart home is explained.Secondly,introduces the video surveillance system's overall structure ,working principle,the system software and function,a brief introduction of system hardware and software platform, and in detail designs video controller subsystem.Then, moving object detection and tracking of video surveillance system are explained chapter III. We use a self-adaptive background subtraction method to update background and detect moving object based on the classification of probability, After associates with multiple methods for shadow suppression,we introduce an improved Region Growing method to separate and locate each moving object..We have studied bounding box tracking and the relationship of moving object.For system interoperation, a new BACnet video point object model and video point operation service are introduced. According to this model, a surveillance application scheme based on scene events is built in intelligent building system.Finally,conclusions of the system are presented,and some propositions about the direction and contents of further research are suggested at the end of this thesis.