Optimization approach with edge-preserving regularization to time domain ID inverse scattering

Citation
H. Yoshida et al., Optimization approach with edge-preserving regularization to time domain ID inverse scattering, ELEC C JP 2, 84(10), 2001, pp. 1-8
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS
ISSN journal
8756-663X → ACNP
Volume
84
Issue
10
Year of publication
2001
Pages
1 - 8
Database
ISI
SICI code
8756-663X(2001)84:10<1:OAWERT>2.0.ZU;2-L
Abstract
The electromagnetic inverse scattering problems are in general ill-conditio ned, so that image reconstruction becomes unstable when noise exists or whe n the number of unknown parameters is increased. Usually, regularization is required. However, when regularization is applied, the high-frequency comp onents in the reconstructed image are suppressed and the reconstruction of the edges becomes difficult. Hence, the concept of edge preservation has be en proposed, by which the smoothly varying parts are made smoother and the sharply varying parts sharper. The effectiveness of this concept has been c onfirmed by analysis in the frequency domain. In this paper, the concept of edge preservation is introduced into the analysis in the time domain. The effect of edge preservation is discussed. As numerical examples, estimation results are presented for the medium constants in a lossless dielectric sl ab and a lossy dielectric slab, The effectiveness of the method is confirme d. (C) 2001 Scripta Technica.