| Recent studies have confirmed that the Optical Camera Communication(OCC)in IEEE 802.15.7 standard has such excellent characteristics as flexible network architecture,low delay,reliable and high-speed transmission.At the same time,the low cost and functional diversity of ordinary cameras make the equipment equipped with cameras numerous.As the light source device exists universally,it is possible to be transformed into communication equipment.All of these provide the equipment basis for the deployment of optical camera communication,which also leads to many studies on indoor positioning based on such communication systems.In this thesis,indoor positioning and tracking technology based on optical camera system is studied in combination with the communication transmission characteristics of this type in IEEE 802.15.7m standard and consideration of positioning requirements.The main work includes three parts.Firstly,according to the functional structure and physical characteristics of the optical camera positioning system,combined with the geometric relationship of imaging space,the simulation image was obtained and the pose was calculated,realizing the function of the optical camera communication-based positioning system by simulation.Secondly,the location solution method is discussed,three calculation models are selected for comprehensive analysis and comparison,and the computational complexity and location accuracy of the three methods are analyzed.At the same time,many factors affecting the positioning accuracy are simulated and analyzed,such as camera resolution,camera focal length,light source device characteristics,relative position relationship of transmitter and receiver,etc.,and the simulation results that can be used for reference in the application.Thirdly,on the basis of single point positioning,a complete tracking process based on optical camera system is designed by combining optical flow method,Kalman filter and loop detection technology.The simulation results show the feasibility of the tracking process,and the effect of introducing filter is proved. |
