Original Article: Comparingparameter choice methods for regularization of ill-posed problems

Authors:
Frank Bauer;Mark A. Lukas
Affiliations:
Fuzzy Logic Laboratorium Linz-Hagenberg, University of Linz, Softwarepark 21, 4232 Hagenberg, Austria;Mathematics and Statistics, Murdoch University, South Street, Murdoch, WA 6150, Australia
Venue:
Mathematics and Computers in Simulation
Year:
2011

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Abstract

Abstract: In the literature on regularization, many different parameter choice methods have been proposed in both deterministic and stochastic settings. However, based on the available information, it is not always easy to know how well a particular method will perform in a given situation and how it compares to other methods. This paper reviews most of the existing parameter choice methods, and evaluates and compares them in a large simulation study for spectral cut-off and Tikhonov regularization. The test cases cover a wide range of linear inverse problems with both white and colored stochastic noise. The results show some marked differences between the methods, in particular, in their stability with respect to the noise and its type. We conclude with a table of properties of the methods and a summary of the simulation results, from which we identify the best methods.