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Accurate pseudo Zernike moment invariants for grey-level images
Faculty
Computer Science
Year:
2012
Type of Publication:
Article
Pages:
234-242
Authors:
Hosny, K. M
DOI:
10.1179/1743131X11Y.0000000023
Journal:
IMAGING SCIENCE JOURNAL MANEY PUBLISHING
Volume:
60
Research Area:
Imaging Science \& Photographic Technology
ISSN
ISI:000306232300005
Keywords :
pseudo Zernike moments, geometric moments, RST, accurate computation, shape descriptors
Abstract:
Pseudo Zernike moments are orthogonal moments used to represent digital images with minimum amount of information redundancy. Pseudo Zernike moment invariants are image features that are invariant to translation, scaling and rotation which play an essential role in discriminating and classifying similar images where the performance and robustness of the classifiers are highly dependent on the accuracy of these futures. In this work, a new method is presented for accurate computation of two-dimensional pseudo Zernike moment invariants. Approximation errors are removed by using exact geometric and radial geometric moments. Invariance to translation and scaling are computed, while the rotation invariance is directly achieved as direct property of pseudo Zernike moments. Numerical experiments are conducted on a set of standard images. The obtained results demonstrate the efficiency of the proposed method.
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