Abstract
Inverse problems in seismic tomography are often cast in the form of an optimization problem involving a cost function composed of a data misfit term and regularizing constraint or penalty. Depending on the noise model that is assumed to underlie the data acquisition, these optimization problems may be non-smooth. Another source of lack of smoothness (differentiability) of the cost function may arise from the regularization method chosen to handle the ill-posed nature of the inverse problem. A numerical algorithm that is well suited to handle minimization problems involving two non-smooth convex functions and two linear operators is studied. The emphasis lies on the use of some simple proximity operators that allow for the iterative solution of non-smooth convex optimization problems. Explicit formulas for several of these proximity operators are given and their application to seismic tomography is demonstrated.
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Acknowledgements
I.L. is a research associate of the Fonds de la Recherche Scientifique (FNRS).
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Loris, I. (2014). Numerical Algorithms for Non-smooth Optimization Applicable to Seismic Recovery. In: Freeden, W., Nashed, M., Sonar, T. (eds) Handbook of Geomathematics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27793-1_65-3
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DOI: https://doi.org/10.1007/978-3-642-27793-1_65-3
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Numerical Algorithms for Non-smooth Optimization Applicable to Seismic Recovery- Published:
- 17 September 2014
DOI: https://doi.org/10.1007/978-3-642-27793-1_65-3
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Numerical Algorithms for Non-smooth Optimization Applicable to Seismic Recovery- Published:
- 21 August 2014
DOI: https://doi.org/10.1007/978-3-642-27793-1_65-2