Journal
SIGNAL PROCESSING
Volume 92, Issue 2, Pages 308-318Publisher
ELSEVIER
DOI: 10.1016/j.sigpro.2011.07.018
Keywords
Color image; Quaternion; Zernike moment; Moment invariant
Categories
Funding
- National Basic Research Program of China [2011CB707904]
- NSFC [61073138, 60911130370, 60972163]
- Ningbo Natural Science Foundation [2010A610106, 2009A610090]
- Natural Science Foundation of Jiangsu Province [SBK200910055, BK2010426]
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Moments and moment invariants have become a powerful tool in pattern recognition and image analysis. Conventional methods to deal with color images are based on RGB decomposition or graying, which may lose some significant color information. In this paper, by using the algebra of quaternions, we introduce the quaternion Zernike moments (QZMs) to deal with the color images in a holistic manner. It is shown that the QZMs can be obtained from the conventional Zernike moments of each channel. We also provide the theoretical framework to construct a set of combined invariants with respect to rotation, scaling and translation (RST) transformation. Experimental results are provided to illustrate the efficiency of the proposed descriptors. (C) 2011 Elsevier B.V. All rights reserved.
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