无控制条件下机载LiDAR航带拟稳平差方法
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摘要
针对无控制条件下机载LiDAR测区数据在平差过程中,由于受平差基准选取因素的影响,或难以补偿因POS系统导致的系统偏差,或容易造成误差累积的问题,提出了一种机载LiDAR航带拟稳平差方法;首先介绍了航带平差方法采用的航带形变模型,然后提出了航带拟稳平差模型,并推导了航带拟稳平差约束条件,同时可根据测区实际情况调整拟稳基准权值;最后利用该模型进行机载LiDAR航带平差;实验表明,该方法能够在无控制条件下有效减弱或消除机载LiDAR数据的系统误差,同时抑制航带平差过程中累积误差的产生,从而提高点云数据的质量和精度。
When dealing with the airborne LiDAR data without control conditions,it is difficult to compensate for the system deviation caused by the POS system and easy to cause the problem of error accumulation due to the influence of the selection factor of the adjustment datum.An airborne LiDAR strip quasi-stable adjustment method is proposed to solve this difficulty.Firstly,the strip deformation model is introduced which is used in strip adjustment methods.Then,the airborne LiDAR strip quasi-stable adjustment model is discussed in detail and quasi-stable adjustment restrict equation is deduced.And the reference weight of the quasi-stable adjustment can be adjusted according to the actual situation of the survey area.Finally,this model is used in airborne LiDAR adjustment experiment.The results demonstrate that strip quasi-stable adjustment method can significantly reduce data's systematic error,while restrain the strip adjustment error accumulation and improve the adjustment accuracy without the control condition.
When dealing with the airborne LiDAR data without control conditions,it is difficult to compensate for the system deviation caused by the POS system and easy to cause the problem of error accumulation due to the influence of the selection factor of the adjustment datum.An airborne LiDAR strip quasi-stable adjustment method is proposed to solve this difficulty.Firstly,the strip deformation model is introduced which is used in strip adjustment methods.Then,the airborne LiDAR strip quasi-stable adjustment model is discussed in detail and quasi-stable adjustment restrict equation is deduced.And the reference weight of the quasi-stable adjustment can be adjusted according to the actual situation of the survey area.Finally,this model is used in airborne LiDAR adjustment experiment.The results demonstrate that strip quasi-stable adjustment method can significantly reduce data's systematic error,while restrain the strip adjustment error accumulation and improve the adjustment accuracy without the control condition.
引文
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[10]陈洁,杜磊,李京,等.地面控制点对机载LiDAR航带平差结果影响分析[J].测绘通报,2015,(S1):1-4.
[11]黎东,王成,习晓环,等.共面约束的机载LiDAR IMU安置角误差自动检校方法[J].测绘科学,2017,42(9):98-103.
[12]陈洁,肖春蕾,李京.无检校场的机载LiDAR点云数据检校方法[J].国土资源遥感,2015,27(4):27-33.
[13]谢劭峰,刘田龙.国产机载LiDAR系统安置角误差检校方案研究[J].测绘与空间地理信息,2016.6(39):50-55.
[14]Zhang Yongjun,Xiong Xiaodong,Zheng Maoteng.LiDAR strip adjustment using multi-features matched with aerial images[J].IEEE Transactions on Geoscience&Remote Sensing.2014,53(2):976-987.
[15]张婧,张万寿,姜三.基于虚拟点模型的机载LiDAR系统自检校方法[J].测绘学报,2013,42(3):389-396.
[16]周江文.监测网的拟稳平差[A].拟稳平差论文集[C].北京:测绘出版社,1987.
[2]黄先锋,李卉,等.机载激光扫描数据误差分析与精度改善研究进展[J].遥感信息,2007,(3):91-95
[3]M Triglavˇcekada,F Crosilla,M Kosmatinfras.Simplified analytical model for a-priori LiDAR point-positioning error estimation and a review of LiDAR error sources[J].Photogrammetric Engineering&Remote Sensing.2009,75(75):1425-1439
[4]左志权,刘正军,张力.三维最小二乘表面匹配泛型数学模型及在机载LiDAR条带平差中的应用[J].遥感学报,2013,17(6):1546-1558.
[5]袁豹.基于总体最小二乘匹配的机载LiDAR点云航带平差方法[J].测绘工程,2016,25(10):53-58.
[6]王丽英,宋伟东.机载LiDAR数据逐航带平差与航带区域网平差对比[J].测绘科学,2013,38(2):32-34.
[7]赵大伟,裴海龙,丁洁,等.无人机机载激光雷达系统航带拼接方法研究[J].中国激光,2015,42(1):323-330.
[8]R Munjy.Simultaneous adjustment of LIDAR strips[J].Journal of Surveying Engineering,2015,141(1):04014012.
[9]杨书娟,张珂殊,邵永社.机载激光雷达系统的航带平差[J].中国激光,2017,44(12):1210003.
[10]陈洁,杜磊,李京,等.地面控制点对机载LiDAR航带平差结果影响分析[J].测绘通报,2015,(S1):1-4.
[11]黎东,王成,习晓环,等.共面约束的机载LiDAR IMU安置角误差自动检校方法[J].测绘科学,2017,42(9):98-103.
[12]陈洁,肖春蕾,李京.无检校场的机载LiDAR点云数据检校方法[J].国土资源遥感,2015,27(4):27-33.
[13]谢劭峰,刘田龙.国产机载LiDAR系统安置角误差检校方案研究[J].测绘与空间地理信息,2016.6(39):50-55.
[14]Zhang Yongjun,Xiong Xiaodong,Zheng Maoteng.LiDAR strip adjustment using multi-features matched with aerial images[J].IEEE Transactions on Geoscience&Remote Sensing.2014,53(2):976-987.
[15]张婧,张万寿,姜三.基于虚拟点模型的机载LiDAR系统自检校方法[J].测绘学报,2013,42(3):389-396.
[16]周江文.监测网的拟稳平差[A].拟稳平差论文集[C].北京:测绘出版社,1987.