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Speckles and DIC or Checkerboards and LSA?

  • M. Grédiac
  • B. Blaysat
  • F. Sur
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Two measurement techniques, namely DIC and LSA, are compared in this study. Both techniques consist in minimizing the optical residual. DIC performs the minimization in the real domain on speckles. LSA performs this minimization in the Fourier domain on periodic patterns such as checkerboards. It is shown here that for the same systematic error and the same spatial resolution, the noise level in displacement and strain maps is lower with LSA than with DIC.

Keywords

Bias Checkerboard DIC LSA Random error Speckle optimization 

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Copyright information

© The Society for Experimental Mechanics, Inc. 2019

Authors and Affiliations

  1. 1.Université Clermont Auvergne, SIGMA, Institut Pascal, UMR CNRS 6602Clermont-FerrandFrance
  2. 2.Université de Lorraine, CNRS, INRIA projet MagritVandoeuvre-lès-Nancy CedexFrance

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