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Mesure de formes par corrélation multi-images : application à l'inspection de pièces aéronautiques à l'aide d'un système multi-caméras

Jacques Harvent 1, 2
1 LAAS-RAP - Équipe Robotique, Action et Perception
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : In 2006 the Ecole des Mines d'Albi and the LAAS-CNRS initiated a collaboration with AIRBUS Toulouse and EADS-IW for the development of a computer-vision-based system for the inspection of aeronautic parts (fuselage parts, metallic or composite aeronautical panels, etc.) in order to detect shape defects (shape deviation with regard to the desired overall shape corresponding to the CAD model). The system is composed of several cameras (at least four) giving the capacity to inspect large parts. The cameras are fixed on a rigid structure and the parts to be inspected are positioned in front of the system. Several images are acquired synchronously and they are used to reconstruct the 3D model of the part. This thesis focuses on different strategies that can be developed to manage a multiple-camera system. The different steps of the digitization process are presented, namely: multiple-view digital image correlation (a multiple-image DIC criterion well suited to the multiple views context is addressed), 3D cloud stitching, calibration assistance unit. Using more than two cameras has brought multiple benefits. It allows digitizing large aeronautic parts (several m²), provides the whole shape of an object in a one-shot acquisition, improves the accuracy thanks to data redundancy, and permits to avoid specular reflections on non-lambertian surfaces. Our algorithms have been evaluated through synthetic images as well as through the comparison with measurements acquired by different commercial digitizing systems.
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https://tel.archives-ouvertes.fr/tel-00579461
Contributor : Jean-José Orteu <>
Submitted on : Thursday, March 24, 2011 - 2:30:35 PM
Last modification on : Thursday, February 27, 2020 - 1:15:31 AM
Document(s) archivé(s) le : Saturday, June 25, 2011 - 2:32:06 AM

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  • HAL Id : tel-00579461, version 1

Citation

Jacques Harvent. Mesure de formes par corrélation multi-images : application à l'inspection de pièces aéronautiques à l'aide d'un système multi-caméras. Traitement du signal et de l'image [eess.SP]. Université Paul Sabatier - Toulouse III, 2010. Français. ⟨tel-00579461⟩

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