三角网格模型重建中的误差分析与显示  

Error Analysis and Visualization of Reconstructed Triangle Mesh Surface

作　　者：张丽艳[1] 周儒荣[1] 蔡炜斌[1] 周来水[1] 

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《南京航空航天大学学报》2001年第3期282-286,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金 (编号 :5 990 5 0 1 3 );国家 863高科技项目基金 (编号 :863 -5 1 1 -942 -0 2 2 );航空科学基金(编号 :0 0 H5 2 0 69)资助项目

摘　　要：根据实物模型的坐标测量 ,数据重建模型的三角网格曲面表示在实践中有着广泛的应用。在许多对精度有较高要求的应用中 ,对重建网格模型的误差分析是必不可少的。本文提出并实现了一种对重建三角网格模型进行误差分析的方法 ,该方法首先对网格模型空间进行划分以提高算法的效率 ,通过计算测量点与网格模型间的最短距离 ,得到网格模型的误差分布 ,最后将计算得到的三角网格模型中每个顶点的误差度量转换为相应的颜色表示 ,并用彩色云图对分析结果进行直观的显示。Triangle mesh surface reconstruction on digitized poi nts obtained from existing physical objects is widely used in practice. In a var iety of situations in which high precise model is required, the error analysis i s inevita ble. A method for analyzing the error distribution of the reconstructed triangle mesh surface is proposed. This paper first puts forward a sheme to partitio n t he model space in order to improve the efficiency of the algorithm. Then, by cal culati ng the shortest distance between the digitized points and the triangle mesh, the error distribution of the triangle mesh is obtained. Finally, the error on each vertex of the mesh is converted to corresponding RGB color by means of linear i nterpolation and the result of error analysis is displayed by colored nephogram. Several examples show that the error analysis and the visualization method are practical and reasonable.

关 键 词：逆向工程 曲面重建 误差分析 主角网格 模型重建 几何造型 算法 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构] O241[自动化与计算机技术—计算机科学与技术]