Special Section on Quality Control by Artificial Vision: Nonconventional Imaging Systems

Inspection of aeronautical mechanical parts with a pan-tilt-zoom camera: an approach guided by the computer-aided design model

[+] Author Affiliations
Ilisio Viana, Jean-José Orteu, Florian Bugarin

Université de Toulouse, INSA, UPS, Mines Albi, ISAE, Institut Clément Ader, Campus Jarlard, 81013 Albi, France

Nicolas Cornille

G2Metric, 40 Chemin Cazalbarbier, 31140 Launaguet, France

J. Electron. Imaging. 24(6), 061118 (Dec 23, 2015). doi:10.1117/1.JEI.24.6.061118
History: Received June 28, 2015; Accepted November 25, 2015
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Abstract.  We focus on quality control of mechanical parts in aeronautical context using a single pan-tilt-zoom (PTZ) camera and a computer-aided design (CAD) model of the mechanical part. We use the CAD model to create a theoretical image of the element to be checked, which is further matched with the sensed image of the element to be inspected, using a graph theory–based approach. The matching is carried out in two stages. First, the two images are used to create two attributed graphs representing the primitives (ellipses and line segments) in the images. In the second stage, the graphs are matched using a similarity function built from the primitive parameters. The similarity scores of the matching are injected in the edges of a bipartite graph. A best-match-search procedure in the bipartite graph guarantees the uniqueness of the match solution. The method achieves promising performance in tests with synthetic data including missing elements, displaced elements, size changes, and combinations of these cases. The results open good prospects for using the method with realistic data.

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Citation

Ilisio Viana ; Jean-José Orteu ; Nicolas Cornille and Florian Bugarin
"Inspection of aeronautical mechanical parts with a pan-tilt-zoom camera: an approach guided by the computer-aided design model", J. Electron. Imaging. 24(6), 061118 (Dec 23, 2015). ; http://dx.doi.org/10.1117/1.JEI.24.6.061118


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