#### Filter Results:

- Full text PDF available (8)

#### Publication Year

1990

2017

- This year (1)
- Last 5 years (3)
- Last 10 years (7)

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

- Fabio Di Benedetto
- SIAM J. Scientific Computing
- 1995

- Dario Bini, Fabio Di Benedetto
- SPAA
- 1990

We introduce a new preconditioner for solving a symmetric Toeplitz system of equations by the conjugate gradient method. This choice leads to an algorithm which is particularly suitable for parallelâ€¦ (More)

- Paola Brianzi, Fabio Di Benedetto, Claudio Estatico
- SIAM J. Scientific Computing
- 2008

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 applyâ€¦ (More)

- Fabio Di Benedetto, Claudio Estatico, Stefano Serra Capizzano
- SIAM J. Scientific Computing
- 2005

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 inâ€¦ (More)

The normal equations constructed by a Toeplitz matrix are studied, in order to nd a suitable preconditioner related to the discrete sine transform. New results are given about the structure of theâ€¦ (More)

- Vincenza Del Prete, Fabio Di Benedetto, Marco Donatelli, Stefano Serra Capizzano
- J. Computational Applied Mathematics
- 2014

We consider a special type of signal restoration problem where some of the sampling data are not available. The formulation related to samples of the function and its derivative leads to a possiblyâ€¦ (More)

- Paola Brianzi, Fabio Di Benedetto, Claudio Estatico
- Comp. Opt. and Appl.
- 2013

Regularization methods for inverse problems formulated in Hilbert spaces usually give rise to over-smoothness, which does not allow to obtain a good contrast and localization of the edges in theâ€¦ (More)

A nonlinear inverse scattering problem arising in microwave imaging is analyzed and numerically solved. In particular, the dielectricproperties of an inhomogeneous object (i.e., the image to restore)â€¦ (More)

- Claudio Estatico, Fabio Di Benedetto
- Numerical Algorithms
- 2012

In this paper we analyze in a general and pure algebraic way imaging systems characterized by shift-variant integral kernels which hide some intrinsic shift-invariance, related to an appropriateâ€¦ (More)

- Daniele Bertaccini, Fabio Di Benedetto
- SIAM J. Numerical Analysis
- 2007

The eigenvalue spectrum of a class of nonsymmetric preconditioned matrices arising in time-dependent partial differential equations is analyzed and discussed. The matrices generated by the underlyingâ€¦ (More)