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Microwave imaging : reconstruction from experimental data using conjugate gradient and enhancement by edge-preserving regularization

P. Lobel 1 Christian Pichot 1 Laure Blanc-Féraud 2 Michel Barlaud 3
2 MORPHEME - Morphologie et Images
CRISAM - Inria Sophia Antipolis - Méditerranée , IBV - Institut de Biologie Valrose : U1091, Laboratoire I3S - SIS - Signal, Images et Systèmes
Abstract : A method for reconstructing the complex permittivity profile of lossy dielectric objects from measured scattered far-field data is presented. An iterative reconstruction algorithm based on a conjugate gradient method is derived from an integral representation of the electric field and applying a moment method solution. Results obtained from experimental data are shown for both known and unknown targets. Then, a new regularization procedure is developed to enhance the quality of the reconstruction. This method, based on a Markov random fields approach, models the object to be reconstructed by homogeneous areas separated by borderlike discontinuities. Finally, the enhancement is shown by the reconstruction of a polystyrene square cylinder.
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https://hal.archives-ouvertes.fr/hal-00986374
Contributor : Jean-Pierre Damiano <>
Submitted on : Friday, May 2, 2014 - 11:51:02 AM
Last modification on : Friday, June 5, 2020 - 4:44:03 AM

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P. Lobel, Christian Pichot, Laure Blanc-Féraud, Michel Barlaud. Microwave imaging : reconstruction from experimental data using conjugate gradient and enhancement by edge-preserving regularization. International Journal of Imaging Systems and Technology, Wiley, 1997, 8 (4), pp.337-342. ⟨10.1002/(SICI)1098-1098(1997)8:4<337::AID-IMA1>3.0.CO;2-B⟩. ⟨hal-00986374⟩

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