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针对现有无线定位算法精度较低和成本较高的不足,结合基于发光二极管(LED)照明器件的可见光通信(VLC)系统,考虑相机成像镜头材质不均、装配偏差等因素对真实图像的扭曲和畸变,设计提出了一种新型的基于LED信号光源的相机定标定位算法。该算法根据接收机与LED信号光源的位置关系和通过VLC系统获取的LED信号光源的位置信息,可以解算出接收机的位置和姿态信息,并可以通过对准校正提高VLC系统抗干扰能力的影响。实验结果表明,该算法在实现厘米级定位精度的同时,可以解算出5°级别的姿态角度信息;同时,使用该算法根据位置信息进行对准校正的VLC系统误比特率较跟踪校正的VLC系统误比特率提高了两个数量级,提高了VLC系统的抗干扰能力和稳定性。
Aiming at the low accuracy and high cost of the existing wireless location algorithm, combined with visible light communication (VLC) system based on LED lighting device, the real image distortion And distortion, a novel camera calibration and positioning algorithm based on LED signal light source is proposed. According to the position relationship between receiver and LED signal light source and the position information of LED signal light source obtained by VLC system, this algorithm can calculate the position and attitude information of receiver and can improve the anti-interference ability of VLC system through alignment correction . The experimental results show that the proposed algorithm can calculate the attitude angle of 5 ° while achieving centimeter-level positioning accuracy. At the same time, the VLC system using the algorithm to align and correct according to the position information has higher bit error rate than the tracking-corrected VLC system Bit error rate increased by two orders of magnitude, improve the VLC system anti-interference ability and stability.