On accounting for speckle extinction via DIC and PCA - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Optics and Lasers in Engineering Année : 2022

On accounting for speckle extinction via DIC and PCA

Résumé

Digital Image Correlation (DIC) is a full-field measurement technique that generally relies on brightness conservation principles. This work aims to analyze cases in which the speckle pattern vanished after heating, thereby severely altering the brightness. Sets of images acquired during \textcolor{red}{\bf 6} experiments were registered and then used to obtain optimal sets of reference images for each time step via Principal Component Analysis (PCA). The proposed methodology significantly reduced the gray level residuals and provided insight into brightness variations that occurred in the analyzed cases. It was possible to study cases with severe speckle pattern changes by updating the reference image when standard DIC did not converge and using the PCA methodology to obtain optimal reference states.
Fichier principal
Vignette du fichier
OLE2021b-ccsd.pdf (14.3 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03358220 , version 1 (29-09-2021)

Identifiants

Citer

Rafael Vargas, R B Canto, François Hild, Stéphane Roux. On accounting for speckle extinction via DIC and PCA. Optics and Lasers in Engineering, 2022, 149, pp.106813. ⟨10.1016/j.optlaseng.2021.106813⟩. ⟨hal-03358220⟩
70 Consultations
52 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More