A fast digital image correlation algorithm based on Hartley transform and global sum-table scheme

Jianwei Huang; Zhixue Dong

doi:10.1117/12.866262

19 August 2010 A fast digital image correlation algorithm based on Hartley transform and global sum-table scheme

Jianwei Huang, Zhixue Dong

Proceedings Volume 7820, International Conference on Image Processing and Pattern Recognition in Industrial Engineering; 78200H (2010) https://doi.org/10.1117/12.866262
Event: International Conference on Image Processing and Pattern Recognition in Industrial Engineering, 2010, Xi'an, China

Abstract

Digital image correlation method (DICM) as a flexible tool for deformation measurements has found widespread use in a variety of fields. One major challenge in practical applications, however, lies in that this technique founded on zeronormalized cross-correlation (ZNCC) criterion is extremely time-consuming in correlation calculation. This paper introduces the Hartley transform and a so-called global sum-table strategy to evaluate the cross-correlation term and all double sums in the ZNCC expression, which can dramatically reduce computational complexity of correlation searching and therefore lead to significant computational savings. Both simulation tests and an actual example of displacement acquisition are employed to validate the feasibility and effectiveness of the fast algorithm, which indicates that it can improve the efficiency of the DICM calculation by ~4-14 times in comparison with the conventional algorithm. This is crucial for realizing a high-efficiency DICM to satisfy speed requirements for time-critical applications and large-scale data processing.

Citation Download Citation

Jianwei Huang and Zhixue Dong "A fast digital image correlation algorithm based on Hartley transform and global sum-table scheme", Proc. SPIE 7820, International Conference on Image Processing and Pattern Recognition in Industrial Engineering, 78200H (19 August 2010); https://doi.org/10.1117/12.866262

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KEYWORDS

Algorithm development

Digital image correlation

Speckle

Holmium

Data processing

Computer simulations

Fourier transforms

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