一种从机载LiDAR点云获取建筑物外部轮廓的方法

A method to extract external contour of buildings from airborne LiDAR data

利用点云的滤波、带距离控制的卷包裹算法以及复杂多边形的简化等一系列的算法对测区的机载LiDAR数据进行运算和处理,最终得到描述建筑物在不同高度时的外部轮廓多边形,为基于影像和辅助数据相结合的遥感影像阴影区域提取方法提供有效的辅助数据源。

The content of this paper is about the operation and processing to airborne LiDAR data of the surveyed area using a series of algorithms containing the filtering of point cloud,the roll-wrap algorithm with distance limit and the simplification of complex polygons.Eventually,get the polygons which describing the external contour of different buildings at a certain height.These polygons are effectively auxiliary data sources to the extraction of shaded region on the remote sensing images based on the combination of images and auxiliary data.