DocumentCode :
1836963
Title :
Topology recognition of 3D closed freeform objects based on topological graphs
Author :
Steiner, D. ; Fischer, A.
Author_Institution :
Dept. of Mech. Eng., Technion-Israel Inst. of Technol., Haifa, Israel
fYear :
2001
fDate :
2001
Firstpage :
82
Lastpage :
88
Abstract :
Reverse engineering (RE) deals with an enormous number of irregular and scattered digitized points that require intensive processing in order to reconstruct the surfaces of an object. Surface reconstruction of freeform objects is based on geometrical and topological criteria. Current fitting methods reconstruct an object using a bottom-up approach, from points to a dense mesh, and finally into smoothed connected freeform sub-surfaces. This type of reconstruction, however, can cause topological problems that lead to undesired surface fitting results. Such problems are particularly common with concave shapes. To avoid problems of this type, the paper proposes a new method that automatically detects the topological structure of an object as a base for surface fitting. The topological reconstruction method described in the paper is based on two stages: (1) creating 3D non-self-intersecting iso-curves from a 3D triangular mesh and (2) extracting a topological graph. The feasibility of the proposed topological reconstruction method is demonstrated on several examples using freeform objects with complex topologies
Keywords :
mesh generation; object recognition; reverse engineering; surface fitting; topology; 3D closed freeform objects; 3D non-self-intersecting iso-curves; 3D triangular mesh; bottom-up approach; complex topologies; concave shapes; fitting methods; freeform objects; geometrical criteria; intensive processing; irregular digitized points; reverse engineering; scattered digitized points; surface fitting results; surface reconstruction; topological criteria; topological graph; topological graphs; topological problems; topological reconstruction method; topological structure; topology recognition; Computer graphics; Laboratories; Mechanical engineering; Reconstruction algorithms; Reverse engineering; Scattering; Shape; Surface fitting; Surface reconstruction; Topology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Graphics and Applications, 2001. Proceedings. Ninth Pacific Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-7695-1227-5
Type :
conf
DOI :
10.1109/PCCGA.2001.962860
Filename :
962860
Link To Document :
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