文章基本信息

标题：Modelling of Tree Cross Sections from Terrestrial Laser-Scanning Data with Free-Form Curves
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作者：N. Pfeifer ; D. Winterhalder
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXVI-8/W2
出版社：Copernicus Publications
摘要：A method to estimate cross sections of tree branches and stems using closed free-form curves is presented. The data is gathered in the form of unstructured point clouds from terrestrial laser scanning of the standing tree in the forest. A method to compute a model for each branch, also applicable to the stem, is presented first. This model describes the branch surfaces with a sequence of overlapping cylinders. In slices orthogonal to these cylinder axes points are selected from the data set and closed B-Splines are fitted to those cross section points. Fitting accuracy of ±1cm can be achieved. The measurement of branch ovality based on these B-Splines is illustrated
关键词：Laser scanning; 3D reconstruction; splines; tree modelling; cross section