Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (10): 68-73,78.doi: 10.3969/j.issn.1000-565X.2010.10.013

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Sub-Pixel Image Registration Algorithm Based on Phase Correlation and Image Resampling

Zhou Wu 1.2  Hu Yue-ming 1.2   

  1. 1.Engineering Research Center for Precision Electronic Manufacturing Equipments of the Ministry of Education,South China University of Technology,Guangzhou 510640,Guangdong,China;2.School of Automation Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2010-01-08 Revised:2010-04-14 Online:2010-10-25 Published:2010-10-25
  • Contact: 周武（1984-），男，博士生，主要从事计算机精密检测研究． E-mail:zhouwu787@126．com
  • About author:周武（1984-），男，博士生，主要从事计算机精密检测研究．
  • Supported by:

    国家自然科学基金重点资助项目（60835001）

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Abstract:

Proposed in this paper is a sub-pixel algorithm based on phase correlation and image resampling for high-accuracy image registration.In this algorithm,first,a pixel-level coarse location is realized using the conventional phase correlation method.Then,a fine step is performed,using the matrix multiplication discrete Fourier transform（DFT） to calculate the resampling region around the coarse point and to further locate the resampling region at a pixel level based on the phase correlation.Moreover,the accuracy equivalence between the matrix multiplication DFT and the zero-padding resampling is proved in detail.Experimental results show that the proposed algorithm is superior to the conventional cross-correlation-based and phase-correlation-based sub-pixel registration algorithms in terms of accuracy,efficiency and noise resistance.

Key words: phase correlation, resampling, sub-pixel, registration, matrix multiplication