Covariance-Preconditioned Iterative Methods for Nonnegatively Constrained Astronomical Imaging

DOI10.1137/040615043zbMath1102.65044OpenAlexW2025959788MaRDI QIDQ5470518

James G. Nagy, Johnathan M. Bardsley

Publication date: 31 May 2006

Published in: SIAM Journal on Matrix Analysis and Applications (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1137/040615043

zbMATH Keywords

numerical examples preconditioning iterative methods linear models steepest descent algorithm ill-conditioned linear systems image restoration statistical methods weighted least squares astronomical imaging nonnegativity constraint Richardson-Lucy algorithm

Mathematics Subject Classification ID

Numerical solutions to overdetermined systems, pseudoinverses (65F20) Ill-posedness and regularization problems in numerical linear algebra (65F22) Image processing (compression, reconstruction, etc.) in information and communication theory (94A08) Iterative numerical methods for linear systems (65F10) Computational methods for problems pertaining to astronomy and astrophysics (85-08)

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Uses Software

Regularization tools

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