无地面控制点的车载激光扫描系统外标定方法
A Calibration Method of Mobile Laser System Without Control Points
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摘要: 车载激光扫描技术能够高效率、高精度、低成本地获取城市三维地理数据,是最先进的三维地理数据获取手段之一。车载激光扫描系统的精确外标定是获取高精度车载激光点云的前提;通常采用建立三维控制场的方法对车载激光扫描仪进行外标定,该方法灵活性差,且需要耗费大量人力物力建立三维控制场。针对此,提出一种无需地面控制点的车载激光扫描系统外标定模型及参数解算方法,该方法利用车载激光扫描系统对同一地物多次扫描的激光点云需重合作为约束条件,使用LM(Levenberg-Marguardt)最优化算法解算标定参数,使用该方法对车载激光扫描系统进行了外标定,并用实测控制点验证了标定后系统的定位精度。Abstract: Mobile mapping technology can be used to acquire geospatial data efficiently,accurately andat low cost,it is one of the most advanced technologies for geospatial data acquisition.A preconditionfor acquiring high quality point clouds using mobile laser systems is that the mobile system be wellcalibrated.Ground control points are used in the common method to calibrate mobile laser systems,but these methods as inflexible and it is labor intensive to collect ground control points.In this paper
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