吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (6): 1860-1866.doi: 10.13229/j.cnki.jdxbgxb201406049

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Amendment of Zernike moment fast computation

ZHAI Feng-wen, Muhammad Asim Azim, WANG Yang-ping, DANG Jian-wu   

  1. School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou 730070,China
  • Received:2013-03-27 Online:2014-11-01 Published:2014-11-01

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Abstract: In this paper, first, the fast computation algorithm of Zernike moments proposed by Mukundan and Ramakrishnan was amended. Second, the transformation method from pseudo polar coordinates to the Descartes coordinates was proposed. Third, the effects of pretreatment of image on both original algorithm and the amended algorithm were tested. For each image at fixed order and fixed repetition, four moment magnitudes corresponding to the four rotations were obtained. Then the ratio of standard deviation and mean value of the four magnitudes were taken as the evaluation indicator. For comparison, the original algorithm and the amended algorithm each got 5×11 indicators from five selected images. Results show that the amended algorithm has 44 indicators exceeding that of the original algorithm.

Key words: information process, fast computation, Zernike polynomial, Zernike moments

CLC Number: 

  • TP391
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