Analysis of Geometric Primitives in Quantitative Structure Models of Tree Stems
Analysis of Geometric Primitives in Quantitative Structure Models of Tree Stems
复制标题
DOI：
10.3390/rs70404581
复制
发表时间：
2015-04-01
期刊：
影响因子：
5
通讯作者：
Casella, Eric
中科院分区：
文献类型：
--
作者：
Akerblom, Markku;Raumonen, Pasi;Casella, Eric
建模树的一种方法是使用几何图元的集合来表示树的茎和分支的表面和拓扑。圆柱体通常被用作几何基元，但它不是唯一可能的选择。我们调查各种几何图元和建模方案，讨论它们的属性，并给出实际的估计与图元的预期建模误差。我们发现，圆柱体是最强大的原始意义上的一个良好的有界体积建模误差，即使在数据中的噪声和差距。它的使用不会导致比那些更复杂的原语更大的错误，而后者对数据质量更敏感。然而，在某些情况下，具有用于词干的更复杂基元的混合方法是有用的。
One way to model a tree is to use a collection of geometric primitives to represent the surface and topology of the stem and branches of a tree. The circular cylinder is often used as the geometric primitive, but it is not the only possible choice. We investigate various geometric primitives and modelling schemes, discuss their properties and give practical estimates for expected modelling errors associated with the primitives. We find that the circular cylinder is the most robust primitive in the sense of a well-bounded volumetric modelling error, even with noise and gaps in the data. Its use does not cause errors significantly larger than those with more complex primitives, while the latter are much more sensitive to data quality. However, in some cases, a hybrid approach with more complex primitives for the stem is useful.