Research on indoor real-time positioning technology of LED visible light communication based on arbitrary three-axis rotation angle

Abstract

LED visible light communication indoor positioning system based on three-axis rotation angle of cell phone, including modulated signal LED downlight, rotation vector sensor and camera of smartphone, target tracking module and developed positioning method. The main processes are: the three-axis rotation angle of cell phone obtained from the rotation vector sensor, the position information of LED downlight image in pixel coordinate system obtained from the camera, the LED downlight position information obtained by decoding method, bring the above information into the positioning system. Meanwhile, the target tracking module based on Continuously Adaptive Mean-shift (CAMSHIFT) algorithm can effectively enhance the system operation speed and improve the real-time performance, and the three-axis rotation angle can effectively adapt to the cell phone pose transformation. This positioning system performs well in terms of positioning accuracy and real-time performance.