Factorized Banded Inverse Preconditioners for Matrices with Toeplitz Structure
Factorized Banded Inverse Preconditioners for Matrices with Toeplitz Structure
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Toeplitz 结构矩阵的因式分解带状逆预处理器
DOI:
10.1137/030601272
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发表时间:
2005-06
期刊:
影响因子:
--
通讯作者:
Wai-Ki Ching
中科院分区:
文献类型:
--
作者:
林福荣;Michael K. Ng;Wai-Ki Ching
In this paper, we study factorized banded inverse preconditioners for matrices with Toeplitz structure. We show that if a Toeplitz matrix T has certain off-diagonal decay property, then the factorized banded inverse preconditioner approximates T-1 accurately, and the spectra of these preconditioned matrices are clustered around 1. In nonlinear image restoration applications, Toeplitz-related systems of the form I + T* D T are required to solve, where D is a positive nonconstant diagonal matrix. We construct inverse preconditioners for such matrices. Numerical results show that the performance of our proposed preconditioners are superior to that of circulant preconditioners. A two-dimensional nonlinear image restoration example is also presented to demonstrate the effectiveness of the proposed preconditioner.
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影响因子:
2.1
作者:
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通讯作者:
R. Chan;P. Tang
DOI:
10.1137/0112045
发表时间:
1964-09
期刊:
Journal of The Society for Industrial and Applied Mathematics
影响因子:
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作者:
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DOI:
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发表时间:
2001-03
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
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作者:
D. Noutsos;P. Vassalos
通讯作者:
D. Noutsos;P. Vassalos
DOI:
10.1137/0614004
发表时间:
1993
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
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作者:
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通讯作者:
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