基于激光扫描仪的树干三维重建方法研究

3D Reconstruction of Tree Stems Based on Laser Scanning of Standing

本文介绍了一种利用三维激光扫描仪,对树木枝干进行三维重建的方法。首先利用激光扫描仪获取一系列树木枝干的坐标数据,继而通过筛选这些数据来重建一系列树木枝干的片断模型,最后利用所得到的这些片断模型进行拼合,从而得到完整枝干的三维模型。利用这种方法重建出来的枝干模型是一系列圆柱体经过空间的叠加而构成的。这种三维重建方法所得到的模型可用于树胸高度的测量以及树干锥度和倾斜度的估算等领域,在实际应用中取得了良好的效果。

a method and algorithm for reconstructing the three-dimensional surface of tree stems using laser scanner, is presented. Firstly, laser scanner delivers a dense cloud of points on a tree. Secondly, this raw point data are filtered for deriving a sequence of segments of tree stem. Finally, these segments of stem are put together and fit of an integrity tree＇s stem model. The model gotten by this method is made up of a series of successive cylinders that overlap in space. The use of resulting 3D reconstruction of tree stem in respect to diameter in breast height, as well as taper and lean assessment of standing trees, is described. A good effect is gotten using this method in practice.