Application of Triangular Mesh Segmentation and Surface Reconstruction for Automobile Sheet Metal
Date Issued
2008
Date
2008
Author(s)
Tzeng, Kai-Wei
Abstract
Surface Reconstruction is one of the most time-consuming process during the development process for automobile sheet metal in reverse engineering. In order to decrease the time cost of development process, surface reconstruction from point sets should be proceeded automatically. Taking the residual error of resulting surface into account, surface fitting from the whole point sets will be inadequate to satisfy the required accuracy; consequently, as a preprocessor, mesh segmentation should be proceeded before surface fitting to improve the residual error of resulting surface.n this paper, a triangular mesh segmentation method adapted to automobile sheet metal is provided as the preprocessor of surface fitting. The proposed segmentation scheme takes STL mesh file as input data and is composed of 4 successive processes：creation of topological relations among mesh primitive elements based on half-edge data structure, approximation for differential properties of mesh vertex, feature property verification of mesh facets and clusters of mesh facets via region growing. By proceeding the processes above and some related post-processes, the original mesh data will be divided into several mesh patches according to the feature shapes and curvature variations.
Subjects
automobile sheet metal
reverse engineering
triangular mesh
region growing
mesh segmentation
Type
thesis
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