Spectral shape descriptor using spherical harmonics

Sajjanhar, Atul, Lu, Guojun, Zhang, Dengsheng, Hou, Jingyu, Zhou, Wanlei and Chen, Yi-Ping Phoebe 2010, Spectral shape descriptor using spherical harmonics, Integrated computer-aided engineering, vol. 17, no. 2, pp. 167-173.

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Title Spectral shape descriptor using spherical harmonics
Author(s) Sajjanhar, Atul
Lu, Guojun
Zhang, Dengsheng
Hou, Jingyu
Zhou, Wanlei
Chen, Yi-Ping Phoebe
Journal name Integrated computer-aided engineering
Volume number 17
Issue number 2
Start page 167
End page 173
Total pages 7
Publisher IOS Press
Place of publication Netherlands
Publication date 2010
ISSN 1069-2509
1875-8835
Keyword(s) CBIR
Feature extraction
Shape representation
Summary In this paper, we propose a spectral descriptor for shapes of objects. The method relies on transforming the 2D objects into 3D space; distance transform and scale space theory is used to transform objects into 3D space. Spherical harmonics of the voxel grid are used to obtain shape descriptors. The proposed methods are compared against two existing methods which use spherical harmonics for shape based retrieval of images. Comparison is done based on ranking of images which is articulated in recall-precision curves. MPEG-7 Still Images Content Set is used for performing experiments. Experimental results show that the performance of the proposed descriptor is significantly better than other methods in the same category.
Language eng
Field of Research 080106 Image Processing
Socio Economic Objective 890301 Electronic Information Storage and Retrieval Services
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2010, IOS Press
Persistent URL http://hdl.handle.net/10536/DRO/DU:30031988

Document type: Journal Article
Collection: School of Information Technology
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