基于激光雷达波形数据的点云生产

被引:25
作者
李奇
马洪超
机构
[1] 武汉大学遥感信息工程学院
关键词
LIDAR; 波形数字化; 波形分析; 滤波; 平滑; 高斯分解; DSM; DTM;
D O I
暂无
中图分类号
TN959.98 [];
学科分类号
摘要
随着数据存储能力和处理速度的提高,小光斑机载激光雷达系统现在已经可以通过数字化采样来存储整个反射波形,而不仅仅是由系统提取出来的3维坐标(即离散点云)。分析波形数据最重要的优点之一是可以在后处理过程中让使用者自己来提取3维坐标。一般的分解方法基于波形的局部最大值和波形的重心,或者有设备厂商提供的简单阈值法,无法获得高精度的分解结果。本文使用改进的EM脉冲检测算法来得到回波脉冲的位置和宽度,并能得到高质量的点云数据,为DSM(Digital Surface Model)和DTM(Digital TerrainModel)生产提供优质数据源。
引用
收藏
页码:349 / 354
页数:6
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