摘要
研究森林资源真实形态建模问题。由于森林树数值特征和机体形态千变万化,数学模型很难表达真实性,传统的三维空间数据模型方法难以真实反映森林资源的复杂形态。为解决上述问题,采用了八叉树算法有效解决了森林模型的计算复杂性,同时又提出了多尺度八叉树细分算法,结合地理信息系统(GIS),构建真实三维森林形态模型。根据八叉树细分算法的形态对象,满足了数据多尺度组织和划分的需求,以空间体元建立起了各种树木对象之间的联系,为空间分析和森林资源的可视化提供了数据支持。仿真结果表明提出改进算法算法能准确高效地实现森林图像真实感,并能适合常见复杂条件下三维复杂森林形态模型的构建。
The traditional method of three-dimensional data model is difficult to truly reflect the the complex three-dimensional form of forest resources.In order to truly reflect the real three-dimensional shape of forest trees,form,the paper proposed an octree-based multi-scale segmentation algorithm using geographic information system（GIS） to build the real three-dimensional shape model of the forest.Octree-based subdivision schemed to meet the form of the object data expression and forest multi-scale organizations,multi-scale division of the needs of the body.With the volume element of space,a link between different kinds of trees was established,laiding the foundation for the spatial analysis and providing data support for the visualization of forest resources.Simulation results show that the proposed octree subdivision method for accurate and efficient modeling of forest body can be used in modeling complex three-dimensional forest formations.
出处
《计算机仿真》
CSCD
北大核心
2011年第12期285-288,共4页
Computer Simulation
关键词
八叉树算法
多尺度
森林建模
地理信息系统
Octree algorithm
Multi-scale
Forest modeling
Geographic information system（GIS）
