基于距离限制的机载激光数据滤波方法

基金项目: 长江学者和创新团队发展计划资助项目(IRT0438);国家863计划资助项目(2006AA12Z151)

详细信息

Distance-Limited Filter for Extracting Ground Points

¹ State Key Laboratory for Information Engineering in Surveying,Mapping and Remote Sensing, Wuhan University,129 Luoyu Road,Wuhan 430079,China² School of Urban Studies,Wuhan University,8 South Donghu Road,Wuhan 430072,China

Funds: 长江学者和创新团队发展计划资助项目(IRT0438);国家863计划资助项目(2006AA12Z151)

摘要: 提出了基于距离限制的滤波算法,利用地物在三维空间的距离特性提取地面信息,并对可能影响算法稳健性的侧面信息提出角度判决的概念。试验表明,本文方法在处理复杂城市地形时,能很好地保留地面的细节信息,剔除低矮植被等非地面信息。
- 距离限制 /
- 点云 /
- 滤波 /
- 激光雷达
Abstract: The extraction of points on the bare earth from point cloud acquired by airborne laser scanning is one of the most important steps for the generation of DTM,and the relative processing is called "filtering".However,most of current filters erode the bare earth in steep sloped landscapes and at discontinuities,and that they retain low vegetation.Therefore,a new filtering method based on distance-limited is proposed for extracting ground points.The angle criterion is used to assure the robustness of the algorithm.The experimental results show that the proposed filtering method could effectively derive the ground points from point cloud in complex urban areas.
- distance-limited /
- point cloud /
- filtering /
- LIDAR