Effect of interpolation on noise propagation from images to DIC displacement maps

Benoît Blaysat 1 Michel Grediac 1 Frédéric Sur 2
2 MAGRIT - Visual Augmentation of Complex Environments
Inria Nancy - Grand Est, LORIA - ALGO - Department of Algorithms, Computation, Image and Geometry
Abstract : This paper introduces and validates a new prediction of sensor noise propagation from images of randomly marked surfaces to displacement maps obtained by Digital Image Correlation (DIC). Images are indeed often affected by sensor noise, which propagates to DIC output. We consider here the 2D global DIC (G-DIC), for which this output is the in-plane displacement calculated at a set of nodes. Predictive formula for the resolution of the displacement at these nodes is already available in the literature. The contribution of the present paper is to revisit this formula to take into account the interpolation required by sub-pixel displacement. A generalization is also proposed to predict the displacement resolution throughout the field of view. It is then extended to several kinds of DIC. The correlation procedure is thoroughly described in order to emphasize the role of the interpolation. A numerical assessment on synthetic data validates the new prediction and shows the improvement brought about by the proposed formula.
Liste complète des métadonnées

Littérature citée [34 références]  Voir  Masquer  Télécharger

Contributeur : Frédéric Sur <>
Soumis le : vendredi 12 février 2016 - 09:44:43
Dernière modification le : mardi 18 décembre 2018 - 16:18:26
Document(s) archivé(s) le : vendredi 13 mai 2016 - 12:46:23


Fichiers produits par l'(les) auteur(s)



Benoît Blaysat, Michel Grediac, Frédéric Sur. Effect of interpolation on noise propagation from images to DIC displacement maps. International Journal for Numerical Methods in Engineering, Wiley, 2016, 108 (3), pp.213-232. 〈http://onlinelibrary.wiley.com/doi/10.1002/nme.5212/full〉. 〈10.1002/nme.5212〉. 〈hal-01255944〉



Consultations de la notice


Téléchargements de fichiers