Hybrid Stereocorrelation Using Infrared and Visible Light Cameras

A Charbal 1, 2 John-Eric Dufour 1 François Hild 1 M Poncelet 1 Ludovic Vincent 2 Stéphane Roux 1
1 LMT - Laboratoire de Mécanique et Technologie
2 SRMA - Service des Recherches Métallurgiques Appliquées
DMN - Département des Matériaux pour le Nucléaire : DEN/DMN
Abstract : 3D kinematic fields are measured using an original stereovision system composed of one infrared (IR) and one visible light camera. Global stereocorrelation (SC) is proposed to register pictures shot by both imaging systems. The stereo rig is calibrated by using a NURBS representation of the 3D target. The projection matrices are determined by an integrated approach. The effect of gray level and distortion corrections is assessed on the projection matrices. SC is performed once the matrices are calibrated to measure 3D displacements. Amplitudes varying from 0 to 800 µm are well captured for in-plane and out-of-plane motions. It is shown that when known rigid body translations are applied to the target, the calibration can be improved when its actual metrology is approximate. Applications are shown for two different setups for which the resolution of the IR camera has been modified.
Keywords : Stereocorrelation 2 Calibration Displacement Resolution
Type de document :
Article dans une revue
Experimental Mechanics, Society for Experimental Mechanics, 2016, 56 (5), pp.845-860. 〈10.1007/s11340-016-0127-4〉
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https://hal.archives-ouvertes.fr/hal-01335740
Contributeur : François Hild <>
Soumis le : mercredi 22 juin 2016 - 11:59:51
Dernière modification le : vendredi 27 avril 2018 - 12:42:04
Document(s) archivé(s) le : vendredi 23 septembre 2016 - 13:20:19

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ENS-CACHAN | CEA | DEN | CEA-UPSAY | UNIV-PARIS-SACLAY

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A Charbal, John-Eric Dufour, François Hild, M Poncelet, Ludovic Vincent, et al.. Hybrid Stereocorrelation Using Infrared and Visible Light Cameras. Experimental Mechanics, Society for Experimental Mechanics, 2016, 56 (5), pp.845-860. 〈10.1007/s11340-016-0127-4〉. 〈hal-01335740〉

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