| 共面约束的机载LiDAR IMU安置角误差自动检校方法 |
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| 引用本文： | 黎东,王成,习晓环,左正立,朱精果.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). |
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| 作者姓名： | 黎东 王成 习晓环 左正立 朱精果 |
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| 作者单位： | 1. 中国科学院电子学研究所,北京 100190;中国科学院大学,北京 100049;中国科学院遥感与数字地球研究所,北京 100094;2. 中国科学院遥感与数字地球研究所,北京,100094;3. 中国科学院光电研究院,北京,100094 |
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| 摘 要： | 针对机载LiDAR数据处理中IMU安置角误差检校问题,该文提出一种基于共面约束的自动检校方法。从激光点云中自动提取尖顶房屋顶平面,并建立连接平面关系,基于激光脚点坐标计算公式和共面约束条件,通过平差解算得到IMU安置角误差参数。以Riegl Q780获取的数据进行实验,该方法检校结果与RiProcess软件提供的检校参数非常接近。经过误差改正后,相邻航线获取的点云可以很好地重合在一起。相对于人工选择特征地物进行IMU安置角误差检校,该方法可以大大提高检校的效率和可靠性。
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| 关 键 词： | 机载LiDAR IMU安置角误差 检校 点云 共面 |
An automatic bore-sight calibration method for airborne LiDAR based on co-planar constrains |
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| LI Dong,WANG Cheng,XI Xiaohuan,ZUO Zhengli,ZHU Jingguo.An automatic bore-sight calibration method for airborne LiDAR based on co-planar constrains[J].Science of Surveying and Mapping,2017,42(9). |
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| Authors: | LI Dong WANG Cheng XI Xiaohuan ZUO Zhengli ZHU Jingguo |
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| Abstract: | This paper proposed a method for automatic bore-sight calibration which is a key step in airborne LiDAR data processing.Planar patches of gable roof buildings are extracted from point cloud data and conjugate planes are found automatically,then the bore-sight angle errors are calculated through iterative adjustment based on airborne LiDAR geo-referencing equation and co-planar constrains.Point cloud data obtained by Riegl Q780 was used in the experiment.The bore-sight parameters obtained by this method are very close to what were calculated by the RiProcess software.And the calibrated point cloud scanned by adjacent strips can coincide together.Compared with the bore-sight calibration method by extracting features manually,this approach can greatly improve the efficiency and reliability. |
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| Keywords: | airborne LiDAR bore-sight errors calibration point cloud co-planar |
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