To deal with the existing problems of studies on bridge detection based on Lidar data: slow speed,extraction result is related to bridge shapes,detection accuracy is influenced by vegetation and so on. An improved bridge extraction algorithm is given. Firstly,with gridding the Lidar data,the neighborhood of the grid instead of the grid point is obtained,resulting in a fast way to get the neighborhood of discrete points. Together with a new morphological operator of three dimensional discrete points,vegetati...
0引言机载激光雷达(light detection and ranging,Lidar)是一种新的航空遥感技术,它能够快速精确的获得地面物体的位置和高程信息,即点云数据。近年来基于点云数据的研究也越来越广泛,例如建筑物提取和重建[1,2],制作DEM[3,4],与遥感影像相结合的地物探测[5]等。桥梁是重要的军
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