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Titolo:
Feature-enhanced synthetic aperture radar image formation based on nonquadratic regularization
Autore:
Cetin, M; Karl, WC;
Indirizzi:
Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA Boston Univ Boston MA USA 02215 t Elect & Comp Engn, Boston, MA 02215 USA
Titolo Testata:
IEEE TRANSACTIONS ON IMAGE PROCESSING
fascicolo: 4, volume: 10, anno: 2001,
pagine: 623 - 631
SICI:
1057-7149(200104)10:4<623:FSARIF>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUTOMATIC TARGET RECOGNITION; SPECTRAL ESTIMATION METHODS; MAXIMUM-ENTROPY; COMPLEX IMAGES; RECONSTRUCTION; RESTORATION; RECOVERY; NOISY; ISAR;
Keywords:
computed imaging; half-quadratic regularization; image reconstruction; inverse problems; nonquadratic optimization; regularization; synthetic aperture radar;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Cetin, M Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA Boston Univ Boston MA USA 02215 Comp Engn, Boston, MA 02215 USA
Citazione:
M. Cetin e W.C. Karl, "Feature-enhanced synthetic aperture radar image formation based on nonquadratic regularization", IEEE IM PR, 10(4), 2001, pp. 623-631

Abstract

We develop a method for the formation of spotlight-mode synthetic apertureradar (SAR) images with enhanced features. The approach is based on a regularized reconstruction of the scattering field which combines a tomographicmodel of the SAR observation process with prior information regarding the nature of the features of interest. Compared to conventional SAR techniques, the method we propose produces images with increased resolution, reduced sidelobes, reduced speckle and easier-to-segment regions. Our technique effectively deals with the complex-valued, random-phase nature of the underlying SAR reflectivities, Efficient and robust numerical solution is achieved through extensions of half-quadratic regularization methods to the complex-valued SAR problem. We demonstrate the performance of the method on synthetic and real SAR scenes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 09:49:16