用改进的CT法估算离散点云的法矢和曲率  

Estimating the normal vector and curvature of scattered points xloud with an Improved CT algorithm

作　　者：皇甫中民[1] 闫雒恒[1] 刘雪梅[1] 

机构地区：[1]华北水利水电学院,郑州450011

出　　处：《机械设计与制造》2007年第10期25-27,共3页Machinery Design & Manufacture

摘　　要：逆向工程中一个基本而关键的步骤是基于离散数据点估算法矢和曲率。针对目前常用估算方法CT法的缺点进行改进,提出以传统CT法估算的法矢为初值,通过迭代的过程提高计算精度。实验结果表明,所提出的改进算法不但简单可行,而且能够大大提高计算精度。In reverse engineering,the essential and pivotal process is to estimate the normal vector and curvature of scattered points cloud.In this article,we present an improved ct algorithm which can avoid the shortcoming of the standard ct algorithm.Initially,we estimate the normal vector with the standard ct algorithm.Then,the normal and curvature can be solved accurately by a iterative process,the intial normal being used as a starting value.From the results ,we can draw a conclusion that the algorithm which we present is not only feasible,but also accurate very much.

关 键 词：逆向工程 法矢 曲率 

分 类 号：TH12[机械工程—机械设计及理论]