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Proceedings Paper

An evaluation of local shape descriptors for 3D shape retrieval
Author(s): Sarah Tang; Afzal Godil
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Paper Abstract

As the usage of 3D models increases, so does the importance of developing accurate 3D shape retrieval algorithms. A common approach is to calculate a shape descriptor for each object, which can then be compared to determine two objects' similarity. However, these descriptors are often evaluated independently and on different datasets, making them difficult to compare. Using the SHREC 2011 Shape Retrieval Contest of Non-rigid 3D Watertight Meshes dataset, we systematically evaluate a collection of local shape descriptors. We apply each descriptor to the bag-of-words paradigm and assess the effects of varying the dictionary's size and the number of sample points. In addition, several salient point detection methods are used to choose sample points; these methods are compared to each other and to random selection. Finally, information from two local descriptors is combined in two ways and changes in performance are investigated. This paper presents results of these experiments.

Paper Details

Date Published: 30 January 2012
PDF: 15 pages
Proc. SPIE 8290, Three-Dimensional Image Processing (3DIP) and Applications II, 82900N (30 January 2012); doi: 10.1117/12.912153
Show Author Affiliations
Sarah Tang, Princeton Univ. (United States)
Afzal Godil, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 8290:
Three-Dimensional Image Processing (3DIP) and Applications II
Atilla M. Baskurt; Robert Sitnik, Editor(s)

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