Using deconvolution to improve the metrological performance of the grid method

Michel Grédiac; Frédéric Sur; Claudiu Badulescu; Jean-Denis Mathias

hal-00749812, version 1

Using deconvolution to improve the metrological performance of the grid method

Michel Grédiac ( Auteur à contacter de préférence ) ¹, Frédéric Sur (, ) ², Claudiu Badulescu (, ) ³, Jean-Denis Mathias ⁴

N° RR-8127 (2012)

Résumé : The use of various deconvolution techniques to enhance strain maps obtained with the grid method is addressed in this study. Since phase derivative maps obtained with the grid method can be approximated by their actual counterparts convolved by the envelope of the kernel used to extract phases and phase derivatives, non-blind restoration techniques can be used to perform deconvolution. Six deconvolution techniques are presented and employed to restore a synthetic phase derivative map. Obtained results are analyzed and discussed. Two short examples of actual strain fields restoration are finally presented and discussed.

1 : Institut Pascal
Université Blaise Pascal - Clermont-Ferrand II – CNRS : UMR6602
2 : MAGRIT (INRIA Nancy - Grand Est / LORIA)
CNRS : UMR7503 – INRIA – Université de Lorraine
3 : Laboratoire brestois de mécanique et des systèmes (LBMS)
Université de Bretagne Occidentale [UBO] : EA4325 – ENSTA Bretagne – Ecole Nationale d'Ingénieurs de Brest – Institut Supérieur des Sciences et Technologies de Brest (ISSTB)
4 : Laboratoire d'ingénierie pour les systèmes complexes (UR LISC)
Irstea

hal-00749812, version 1
http://hal.inria.fr/hal-00749812
oai:hal.inria.fr:hal-00749812
Contributeur : Frédéric Sur <>
Soumis le : Jeudi 8 Novembre 2012, 14:09:32
Dernière modification le : Vendredi 9 Novembre 2012, 16:03:07

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