Improvement of Space-Invariant Image Deblurring by Preconditioned Landweber Iterations

The Landweber method is a simple and flexible iterative regularization algorithm, whose projected variant provides nonnegative image reconstructions. Since the method is usually very slow, we apply circulant preconditioners, exploiting the shift invariance of many deblurring problems, in order to ac...

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Veröffentlicht in:	SIAM journal on scientific computing 2008-01, Vol.30 (3), p.1430-1458
Hauptverfasser:	Brianzi, Paola, Di Benedetto, Fabio, Estatico, Claudio
Format:	Artikel
Sprache:	eng
Schlagworte:	Algorithms Approximation Boundary conditions Regularization methods
Online-Zugang:	Volltext
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