Experimental Mechanics

, Volume 53, Issue 8, pp 1357–1370 | Cite as

Demodulation of Spatial Carrier Images: Performance Analysis of Several Algorithms Using a Single Image

  • C. Badulescu
  • M. Bornert
  • J.-C. Dupré
  • S. Equis
  • M. Grédiac
  • J. MolimardEmail author
  • P. Picart
  • R. Rotinat
  • V. Valle
  • Workgroup “Metrology” of the French CNRS research network 2519 “Mesures de Champs et Identification en Mécanique des Solides/Full-field measurements and identification in solid mechanics”.


Optical full-field techniques have a great importance in modern experimental mechanics. Even if they are reasonably spread among the university laboratories, their diffusion in industrial companies remains very narrow for several reasons, especially a lack of metrological performance assessment. A full-field measurement can be characterized by its resolution, bias, measuring range, and by a specific quantity, the spatial resolution. The present paper proposes an original procedure to estimate in one single step the resolution, bias and spatial resolution for a given operator (decoding algorithms such as image correlation, low-pass filters, derivation tools …). This procedure is based on the construction of a particular multi-frequential field, and a Bode diagram representation of the results. This analysis is applied to various phase demodulating algorithms suited to estimate in-plane displacements.


Fringe Error assessment Spatial resolution Displacement resolution Benchmark 



The authors and all the participants of this benchmark are grateful to the CNRS for supporting this research.


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Copyright information

© Society for Experimental Mechanics 2013

Authors and Affiliations

  • C. Badulescu
    • 1
  • M. Bornert
    • 2
  • J.-C. Dupré
    • 3
  • S. Equis
    • 4
  • M. Grédiac
    • 5
  • J. Molimard
    • 6
    Email author
  • P. Picart
    • 7
  • R. Rotinat
    • 8
  • V. Valle
    • 3
  • Workgroup “Metrology” of the French CNRS research network 2519 “Mesures de Champs et Identification en Mécanique des Solides/Full-field measurements and identification in solid mechanics”.
    • 9
  1. 1.LBMS, EA 4325, ENIB-ENSTA-UBOBrestFrance
  2. 2.Laboratoire Navier, UMR 8205, CNRS-École des Ponts ParisTechChamps-sur-MarneFrance
  3. 3.Institut P’, UPR 3346, CNRS-Université de Poitiers-ENSMAFuturoscope ChasseneuilFrance
  4. 4.EPFL, Nanophotonics and Metrology LaboratoryLausanneSwitzerland
  5. 5.Institut Pascal, UMR 6602, Université Blaise Pascal-CNRSClermont-FerrandFrance
  6. 6.LGF, UMR 5307, Ecole Nationale Supérieure des Mines, CIS-EMSE, CNRSSaint-EtienneFrance
  7. 7.LAUM, UMR 6613, CNRS-Université du MaineLe MansFrance
  8. 8.MSMP Laboratory, Arts et Métiers ParisTechChâlons-en-ChampagneFrance
  9. 9.

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