Conjugate-gradient algorithm with edge-preserving regularization for image reconstruction from Ipswich data for mystery objects

Author

Lobel, P. ; Pichot, Ch. ; Blanc-Féraud, L. ; Barlaud, M.

Author_Institution

Lab. Inf. Signaux et Syst., Valbonne, France

Volume

39

Issue

2

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

12

Lastpage

14

Abstract

This paper presents some evidence of the effectiveness of adding edge preserving (EP) regularization to the conjugate radient (CG) method, in reconstructing the shape and permittivity profile of dielectric objects. Without any a priori information, our CG algorithm is also still efficient, and succeeded in reconstructing two mystery targets. As the two targets are now known, we hope we can greatly enhance the reconstruction quality by choosing better values for the calibration factors, and by applying our EP regularization to these data

Keywords

conjugate gradient methods; electromagnetic wave scattering; image reconstruction; inverse problems; permittivity; radar cross-sections; Ipswich data; calibration factors; conjugate-gradient algorithm; dielectric object; edge-preserving regularization; image reconstruction; mystery objects; permittivity profile; shape; Calibration; Character generation; Cost function; Electromagnetic scattering; Image reconstruction; Inverse problems; Iterative algorithms; Scattering parameters; Stability; Testing;

fLanguage

English

Journal_Title

Antennas and Propagation Magazine, IEEE

Publisher

ieee

ISSN

1045-9243

Type

jour

DOI

10.1109/74.584492

Filename

584492