Hybrid Stereocorrelation Using Infrared and Visible Light Cameras

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.
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Experimental Mechanics, Society for Experimental Mechanics, 2016, 56, pp.845 - 860. 〈10.1007/s11340-016-0127-4〉
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Contributeur : François Hild <>
Soumis le : mercredi 19 octobre 2016 - 13:24:52
Dernière modification le : jeudi 11 janvier 2018 - 06:25:46

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Ali Charbal, John-Eric Dufour, François Hild, Martin Poncelet, Ludovic Vincent, et al.. Hybrid Stereocorrelation Using Infrared and Visible Light Cameras. Experimental Mechanics, Society for Experimental Mechanics, 2016, 56, pp.845 - 860. 〈10.1007/s11340-016-0127-4〉. 〈hal-01383896〉

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