An evaluation of local shape descriptors for 3D shape retrieval

Published

September 26, 2012

Author(s)

Afzal A. Godil, Sarah Y. Tang

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.

Proceedings Title

Three-Dimensional Image Processing (3DIP) and Applications II

Conference Dates

May 31, 2012

Conference Location

San Francisco, CA

Conference Title

SPIE 8290, 82900N (2012)

Pub Type

Conferences

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Keywords

3D shape retrieval, local descriptor, bag-of-words algorithm, nonrigid models

Citation

Godil, A. and Tang, S. (2012), An evaluation of local shape descriptors for 3D shape retrieval, Three-Dimensional Image Processing (3DIP) and Applications II , San Francisco, CA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=911358 (Accessed March 26, 2025)