三江源区高寒草甸退化与水塔功能的关系

为便于利用空区探测系统(CMS)采集的采空区点云数据,在三维重建之前对点云数据进行精简是一个必要的环节,提出了一种基于切片的采空区点云数据精简方法.根据采空区点云数据采集的原理,将采空区理想化处理,分析扫描角、扫描线间距及扫描点水平距离之间的关系,据此确定切片间距阈值.将最近点投影到切片上拟合成曲线,结合改进后的偏角法对曲线进行采样精简处理,并以实例证明该方法的有效性.

Relationship between vegetation degeneration and water-tower function on alpine meadow in the three-headwater-river-source region

For ease of utilization Goaf point cloudy data collected by CMS, it is a necessary link to stream point cloudy data. In this paper, a method for point cloudy data thinning of goaf based on slicing is put forwarded. According to the principle of acquisition of goaf point cloudy data, the goaf should be idealized treatment, slice distance threshold is determined by the relationship of scanning angle, scanning line spacing and scanning point horizontal distance. The point projection to the closest slice be fitted curve section, combined with the simplification of improved angular deviation method, and examples are given to demonstrate the validity of the method.