Superoptimal Preconditioned Conjugate Gradient Iteration for Image Deblurring

Authors:
Fabio Di Benedetto;Claudio Estatico;Stefano Serra Capizzano
Affiliations:
-;-;-
Venue:
SIAM Journal on Scientific Computing
Year:
2005

Citing 0
Cited 3

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A short note on singular values of optimal and superoptimal preconditioned matrices

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Abstract

We study the superoptimal Frobenius operators in the two-level circulant algebra. We consider two specific viewpoints: (1) the regularizing properties in imaging and (2) the computational effort in connection with the preconditioned conjugate gradient method. Some numerical experiments illustrating the effectiveness of the proposed technique are given and discussed.