| Auteur | Rechercher : Balima, O.; Rechercher : Favennec, Y.; Rechercher : Boulanger, J.1; Rechercher : Charette, A. |
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| Affiliation | - Conseil national de recherches du Canada
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| Format | Texte, Article |
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| Conférence | ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011, 11 November 2011 through 17 November 2011, Denver, CO |
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| Sujet | Continuous approach; Finite element formulations; Finite-elements method; Integral approach; Numerical tests; Objective functions; Rounding errors; Tomography reconstruction; Exhibitions; Image reconstruction; Mechanical engineering; Optical properties; Optical tomography; Systems analysis; Thermodynamics; Errors |
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| Résumé | In optical tomography, the optical properties of the medium under investigation are obtained through the minimization of an objective function. Generally, this function is expressed as a discrete sum of the square of the errors between measurements and predictions at the detectors. This paper introduces a continuous form of the objective function by taking the integral of the errors. The novelty is that the surfaces of the detectors are taken into account in the reconstruction and a compatibility is obtained for all finite element formulations (continuous and discontinuous). Numerical tests are used to compare the reconstructions with both objective functions. It is seen that the integral approach leads to low values of objective functions those reconstructions may be affected by rounding errors. Scaling of the objective function and its gradient shows that both methods give comparable accuracy with an advantage to the continuous approach where the integral acts as a filter of noise. Copyright © 2011 by ASME. |
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| Date de publication | 2011 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21271629 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | dc4b1aa3-04b5-4047-a75b-4f37aec0877f |
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| Enregistrement créé | 2014-03-24 |
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| Enregistrement modifié | 2020-04-21 |
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