Experimental Techniques

, Volume 40, Issue 3, pp 959–971 | Cite as

Removing Quasi-Periodic Noise in Strain Maps by Filtering in the Fourier Domain

  • M. GrédiacEmail author
  • F. Sur
  • B. Blaysat


Quasi-periodic noise due to various reasons often corrupts strainmaps obtained with full-field measuring systems. The aim of this didactic paper is to show how to remove this noise by changing some Fourier coefficients involved in the two-dimensional (2D) Fourier transform of these strain maps. The basics of the 2D Fourier transform of images, which is a common tool in image processing but that is only scarcely employed in the experimental mechanics community, are first briefly recalled. Several procedures employed for removing undesirable frequencies in strain maps are then discussed. Three different examples illustrate the benefit of this approach.


Fourier Transform Grid Method Image Processing Strain Measurement Strain Map Restoration 


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Copyright information

© The Society for Experimental Mechanics, Inc 2016

Authors and Affiliations

  1. 1.Clermont Université,Université Blaise Pascal, Institut PascalClermont-FerrandFrance
  2. 2.Laboratoire Lorrain de Recherche en Informatique et ses ApplicationsUniversité de LorraineVandoeuvre-lès-Nancy CedexFRANCE

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