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Computers 2017, 6(2), 17; doi:10.3390/computers6020017

Research on Similarity Measurements of 3D Models Based on Skeleton Trees

1
School of Mechatronic Engineering, China University of Mining and Technology, Daxue Road 1, Xuzhou 221116, China
2
State Key Laboratory of Materials Forming and Mould Technology, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Academic Editor: Paolo Bellavista
Received: 8 March 2017 / Revised: 19 April 2017 / Accepted: 19 April 2017 / Published: 22 April 2017
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Abstract

There is a growing need to be able to accurately and efficiently recognize similar models from existing model sets, in particular, for 3D models. This paper proposes a method of similarity measurement of 3D models, in which the similarity between 3D models is easily, accurately and automatically calculated by means of skeleton trees constructed by a simple rule. The skeleton operates well as a key descriptor of a 3D model. Specifically, a skeleton tree represents node features (including connection and orientation) that can reflect the topology and branch features (including region and bending degree) of 3D models geometrically. Node feature distance is first computed by the dot product between node connection distance, which is defined by 2-norm, and node orientation distance, which is defined by tangent space distance. Then branch feature distances are computed by the weighted sum of the average regional distances, as defined by generalized Hausdorff distance, and the average bending degree distance as defined by curvature. Overall similarity is expressed as the weighted sum of topology and geometry similarity. The similarity calculation is efficient and accurate because it is not necessary to perform other operations such as rotation or translation and it considers more topological and geometric information. The experiment demonstrates the feasibility and accuracy of the proposed method. View Full-Text
Keywords: skeleton tree; similarity measurement; model recognition; topology feature; geometry feature skeleton tree; similarity measurement; model recognition; topology feature; geometry feature
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chen, X.; Hao, J.; Liu, H.; Han, Z.; Ye, S. Research on Similarity Measurements of 3D Models Based on Skeleton Trees. Computers 2017, 6, 17.

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