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Publication Citation: An evaluation of local shape descriptors for 3D shape retrieval

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Author(s): Afzal A. Godil; Sarah Y. Tang;
Title: An evaluation of local shape descriptors for 3D shape retrieval
Published: September 26, 2012
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.
Conference: SPIE 8290, 82900N (2012)
Proceedings: Three-Dimensional Image Processing (3DIP) and Applications II
Location: San Francisco, CA
Dates: May 31, 2012
Keywords: 3D shape retrieval; local descriptor; bag-of-words algorithm; nonrigid models
Research Areas: Data Mining, Modeling, Software, Databases, Statistics, Information Processing Systems, Measurement Systems, Imaging
PDF version: PDF Document Click here to retrieve PDF version of paper (505KB)