GROUND SURFACE ESTIMATION IN DENSE FOREST
GROUND SURFACE ESTIMATION IN DENSE FOREST
复制标题
茂密森林中的地表估计
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
H. Takeda
中科院分区：
文献类型：
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作者：
H. Takeda
通常，执行滤波以便从利用机载激光扫描仪获得的激光点提取地面。它主要是去除被测量为树木表面的激光点。然而，在树木茂密的密林中，我们可以看到部分激光点没有到达地面。如果对这类区域的激光点进行滤波，理论上得到的地表只是粗间隔的激光点。因此，在茂密的森林中，用普通的滤波方法不能获得正确的地表。为了解决这一问题，着重分析了激光测量法获取树高图的方法。在激光束不完全穿透的密林中，树高值迅速降低，局部树高图出现空洞。对该空洞进行补偿处理，估算出树高图。本文介绍了利用激光扫描仪在密林中获得的内插树高图估算地表面积的方法。* 通讯作者。
Usually, filtering is performed in order to extract a ground surface from laser points obtained with the airborne laser scanner. It mainly removes the laser points that were measured as trees surface. However, in the dense forest where trees are grown thick, we can see the part of the laser points has not reached to the ground surface. If it conducted the filtering that sorts out the laser points in such area, the ground surface is obtained as the laser points of only coarse interval theoretically. For this reason, a correct ground surface cannot be acquired with the ordinary filtering method in dense forest. In order to solve this problem, it analyzes paying attention to the tree height map obtained by laser measurement. In the dense forest where laser beams do not penetrate partically, trees height value becomes low rapidly and it appears as a gaping hole of local tree height map. Compensation processing which interpolate this gaping hole was performed and the tree height map was estimated. This report presents the ground surface estimation method by using the interpolated tree height map obtained by using the laser scanner in dense forest. * Corresponding author.