摘要
将非均匀B样条曲面拟合和准均匀B样条小波多尺度分解合理地结合起来,实现了DEM地形表面的多分辨率快速自动建模。实验结果表明,其形状造型效果逼真,分辨率明显,是一种高效实用的建模方法。
Multi_resolution real_time modeling and rambling on topography surface has an important application in GIS, but it is a difficult problem in algorithm design. The modeling features of B_Spline curve and surface fitting are studied,and B_Spline wavelet also. This paper realizes automated multi_resolution modeling on DEM (Digital Elevation Model) topography surface by combining non_uniform B_Spline surface fitting with quasi_uniform B_Spline'wavelet multi_scale effectively. The proposed approach in the article is applied to the slope DEM simulation of one constructing expressway located in mountains. The resulting simulation shows that the modeling is realistic and resolution is visible.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第3期20-24,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金资助项目(610175031)
湖北省交通科技基金资助项目(200202-033)
关键词
DEM多分辨率建模
地形表面造型
非均匀B样条
小波
multi-resolution modeling on DEM
topography surface construction
non-uniform B-spline
wavelet
