基于航带重叠区的LiDAR强度校正算法研究  

LiDAR intensity calibration based on overlap region

作　　者：丁琼 余俊鹏 刘定宁 DING Qiong;YU Junpeng;LIU Dingning(Department of Surveying Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学土木与交通工程学院测绘工程系,广东广州510006

出　　处：《测绘工程》2018年第10期18-21,28,共5页Engineering of Surveying and Mapping

基　　金：国家自然科学基金(41704019);广东省自然科学基金资助项目(2015A030310155);中国博士后科学基金资助项目(2014M552176)

摘　　要：机载LiDAR强度信息在传播过程中受到各类因素影响,导致获取原始强度信息含有较大误差不能被直接利用。针对多航带数据中出现的拼接处强度差异大问题,提出一种基于最邻近距离和航带重叠区的强度校正算法。基于最邻近距离自动筛选出同名激光脚点,摆脱传统方法中手动选择同名点的缺陷,极大提高数据处理自动化程度;基于雷达方程和航带重叠区同名点强度一致原则,消除航带间强度差异,极大提高强度的精度和可靠性。实验结果表明,提出的算法能够有效消除航带间强度差异、提高数据处理自动化程度并实现多航带数据无缝拼接。LiDAR intensity cannot be directly used as it is affected by many factors and contains large errors during spreading. A method is proposed based on nearest neighbor algorithm and overlap region to overcome intensity discrepancies in multiple strip project, a） nearest neighbor algorithm helps selection of homologous points getting rid of manual interaction and improving degree of automation; b） overlap discrepancies are eliminated based on radar equation and principle of that intensity of homologous points should be the same. Experiment result shows that this algorithm removes the overlap discrepancies efficiently and improves the effectiveness of data processing in test data.

关 键 词：LIDAR 强度信息 最邻近距离 航带重叠区 校正 

分 类 号：P231.2[天文地球—摄影测量与遥感]