基于发光二极管光源的相机定标无线定位算法  

Wireless Positioning Algorithm Based on Light Emitting Diode Lights and Camera Calibration

作　　者：白勃[1] 田骅[2] 李晓波[3] 

机构地区：[1]西安电子工程研究所,陕西西安710100 [2]中国舰船研究院,北京100192 [3]中国人民解放军驻沈阳飞机工业(集团)有限公司军事代表室,辽宁沈阳110850

出　　处：《中国激光》2015年第2期144-151,共8页Chinese Journal of Lasers

摘　　要：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。Considering the poor precision performance and high cost of the current wireless positioning algorithms, and combined with light emitting diode （LED） lights based visible light communication （VLC） system, a new wireless positioning algorithm based on camera calibration and with high precision is proposed, in vew of camera distortion effect, non-isotropic, assembly deviation on captured pictures. This algorithm could calculate the receiver＇s position, as well as its posture, with the position relationship to the LEDs, and LED position generated through the VLC system, and improve the anti-interference performance of VLC system through tracking and pointing. Experimental results show that this algorithm could achieve a positioning precision of a centimeter level, and generate relatively accurate posture information less than 5~. In addition, the bit error rate of the VLC with tracking and pointing performs two orders of magnitude better than the one with merely tracking, and improves the anti-interference capability and stability of the VLC system.

关 键 词：光通信 无线定位 可见光通信 发光二极管照明器件 相机定标 误比特率 

分 类 号：TN95[电子电信—信号与信息处理]