Reconstruction method on profile features of 2D section
Guojin Chen · Computer-aided engineering · 2008
With the problems that the recognition methods on profile feature are liable to be affected by noise data and the data of every profile of figures has to be transformed into vector data,the reconstruction method on profile features of 2D section is studied and a new method is proposed to implement 2D section profile fitting step by step.Firstly,the measurement data is divided into line points with the average incremental method,all the line points are fitted with Least-Squares Fitting(LSF),and the results are saved into a list table;secondly,with three continuous lines in the list table,if the radius created by two of them satisfies the given threshold,the lines are fitted to arcs;at last,if there are two or more continuous arcs by searching all arcs,these arcs are reconstructed into B-splines and the reconstructed graphics of 2D section profile feature are obtained.The method can effectively decrease the number of fitting feature elements number and improves fitting precision.