Application of Feature Line Extraction and Triangular Mesh Segmentation for Automobile Sheet Metals
Date Issued
2010
Date
2010
Author(s)
Lee, Kang-Hao
Abstract
Reverse engineering is a process of reconstructing CAD models based on an existing object. With the help of a coordinate measuring machine (CMM), we can model the data points into triangular meshes, then reconstruct the surface models from the triangular meshes. In surface reconstruction, it is impossible to construct a surface with a huge number of data points; therefore, we must segment the meshes into smaller regions. In this paper, a triangular mesh segmentation procedure is proposed. The procedure not only efficiently shortens the surface reconstruction, but also improves the accuracy of the reconstructed model to the existing object.
The basic approach consists of three steps: feature line extraction, mesh segmentation, and finally mesh separation. Firstly, feature line extraction is based on the changes of principal curvatures and filter through a threshold value to generate feature vertices. Next, join the feature vertices to form feature lines and extend them to form closed loops. In the meantime, using the topological information of triangular mesh, we can start mesh segmentation. Lastly, with the help of the closed loops, we can decompose the mesh models into smaller regions.
Subjects
reverse engineering
triangular mesh
feature line extraction
mesh separation
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