基于快速成型技术生成等高线的方法  

Contours Generated by Rapid Prototyping Technology

作　　者：万程辉[1,2] 程效军[1] 程小龙[1] 

机构地区：[1]同济大学测绘与地理信息学院,上海200092 [2]南昌工程学院水利与环境工程学院,江西南昌330099

出　　处：《同济大学学报（自然科学版）》2013年第6期926-931,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(40971241);现代城市测绘国家测绘地理信息局重点实验室(20111205W)

摘　　要：提出利用快速成型技术构建等高线的算法.首先利用快速成型技术对点云进行分层,通过对等高线上下两层点云加权计算等高线特征点;然后将特征点转化为格网图像,并利用行列格网直线段对格网图像进行快速轮廓提取及边界跟踪;最后采用B样条曲线拟合生成等高线.试验表明,该方法生成的等高线,不仅具有良好的质量,而且减少了构建三角网的中间过程,提高了计算效率.This paper presents a new contour generation method based on rapid prototyping technology. It stratifies point clouds by adopting rapid prototyping technology. The feature points are derived by calculating the weighted coordinates of points of the upper and lower layers. The feature points are projected onto a plane and converted to a grid image. The image outline is extracted and the edge tracking is performed by the line segment of the grid. Finally, B-spline fitting is used to generate the contours. The experiment shows that the proposed method not only generates contour lines with good quality but also improve the efficiency of operations by reducing the process of building a triangular network.

关 键 词：等高线 快速成型技术 分层厚度 特征点 行列 格网直线段 

分 类 号：P237.3[天文地球—摄影测量与遥感]