中国科学院
紫金山天文台
Purple Mountain Observatory
Chinese Academy of Sciences
题
目：
报告人：
摘
学术报告
XSHD-2011-008
Approximation of Volume and Branch Size
Distribution of Trees from Laser Scanner Data
Dr. Pasi Raumonen
(Department of Mathematics, Tampere
University of Technology, Finland )
要：
I present an approach to automatically approximate the volume and
branch size distribution of trees from terrestrial laser scanner produc
ed point clouds. The approach is based on the assumption that the p
oint cloud is a sample of a surface in 3D space and the surface is loc
ally like a cylinder. The point cloud is covered with small neighborhoo
ds which agree approximately on the local geometry of the surface. T
hen the neighborhoods are characterized geometrically and these ch
aracterizations are used to classify the points into trunk, branch, and
other points. Finally appropriate subsets are determined for cylinder f
itting using geometric characterizations of the subsets.
时 间：
2011年4月6日（星期三）上午10:00
地 点：
（北京西路2号）紫台大楼327教室
欢迎大家积极参与！
2011-3-28
紫金山天文台学术委员会学术交流工作委员会