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Proceedings Paper

Active approach for holographic nondestructive testing of satellite fuel tanks
Author(s): Torsten Merz; Frank Elandaloussi; Dietrich W. Paulus; Wolfgang Osten
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Paper Abstract

In computer vision several views exist how to solve vision problems. The first general methodology was introduced by Marr; he proposed a data-driven and straightforward analysis strategy. Nowadays the concept of active vision introduced by Aloimonos et al. becomes more and more important. In contrast to Marr's philosophy, active vision implies a feedback loop which consists of sensors and active components. In this paper we present a system for the identification of material faults under the surface of a test object. For that purpose the specimen is elastically deformed, then the deformation is made visible using holographic interferometry, and finally flaw parameters are estimated using a model-based approach to analyze interferograms. This is an underconstrained computer vision problem which is regularized using a priori knowledge and an active modification of the experimental setup. More mathematically, this vision task can be seen in the context of inverse problem theory. In this contribution we describe the system and point out how it is related to the methodologies named above. To illustrate the functionality of the system, results are shown from nondestructive testing of satellite fuel tanks.

Paper Details

Date Published: 21 September 1999
PDF: 12 pages
Proc. SPIE 3824, Optical Measurement Systems for Industrial Inspection, (21 September 1999); doi: 10.1117/12.364258
Show Author Affiliations
Torsten Merz, Univ. Erlangen-Nuernberg (Germany)
Frank Elandaloussi, Bremer Institut fuer Angewandte Strahltechnik (Germany)
Dietrich W. Paulus, Univ. Erlangen-Nuernberg (Germany)
Wolfgang Osten, Bremer Institut fuer Angewandte Strahltechnik (Germany)

Published in SPIE Proceedings Vol. 3824:
Optical Measurement Systems for Industrial Inspection
Malgorzata Kujawinska; Wolfgang Osten, Editor(s)

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