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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 24 — Aug. 20, 2010
  • pp: 4545–4553

Displacement field analysis based on the combination digital speckle correlation method with radial basis function interpolation

Chen Tang, Linlin Wang, Si Yan, Jian Wu, Liyan Cheng, and Cancan Li  »View Author Affiliations

Applied Optics, Vol. 49, Issue 24, pp. 4545-4553 (2010)

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The digital speckle correlation method (DSCM) has been widely used to resolve displacement and deformation gradient fields. The computational time and the computational accuracy are still two challenging problems faced in this area. In this paper, we introduce the radial basis function (RBF) interpolation method to DSCM and propose a method for displacement field analysis based on the combination of DSCM with RBF interpolation. We test the proposed method on two computer-simulated and two experimentally obtained deformation measurements and compare it with the widely used Newton– Raphson iteration (NR method). The experimental results demonstrate that our method performs better than the NR method in terms of both quantitative evaluation and visual quality. In addition, the total computational time of our method is considerably shorter than that of the NR method. Our method is particularly suitable for displacement field analysis of large regions.

© 2010 Optical Society of America

OCIS Codes
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: April 9, 2010
Revised Manuscript: August 1, 2010
Manuscript Accepted: August 4, 2010
Published: August 13, 2010

Chen Tang, Linlin Wang, Si Yan, Jian Wu, Liyan Cheng, and Cancan Li, "Displacement field analysis based on the combination digital speckle correlation method with radial basis function interpolation," Appl. Opt. 49, 4545-4553 (2010)

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