This paper describes a cascadic image restoration method which at each level applies a two-way alternating denoising and deblur- ring procedure. Denoising is carried out with a wavelet transform, which also provides an estimate of the noise-level. The latter is used to deter- mine a suitable regularization parameter for the Krylov subspace iter- ative deblurring method. The cascadic multilevel method proceed from coarse to fine image resolution, using suitable restriction and prolonga- tion operators. The choice of the latter is critical for the performance of the multilevel method. We introduce a special deblurring prolongation procedure based on TV regularization. Computed examples demonstrate the effectiveness of the method proposed for determining image restora- tions of high quality

S. Morigi, L. Reichel, F. Sgallari (2013). A Cascadic Alternating Krylov Subspace Image Restoration Method. Heidelberg : Kuijper, A.; Bredies, K.; Pock, Th.; Bischof, H. (Eds.).

A Cascadic Alternating Krylov Subspace Image Restoration Method

MORIGI, SERENA;REICHEL, LOTHAR;SGALLARI, FIORELLA
2013

Abstract

This paper describes a cascadic image restoration method which at each level applies a two-way alternating denoising and deblur- ring procedure. Denoising is carried out with a wavelet transform, which also provides an estimate of the noise-level. The latter is used to deter- mine a suitable regularization parameter for the Krylov subspace iter- ative deblurring method. The cascadic multilevel method proceed from coarse to fine image resolution, using suitable restriction and prolonga- tion operators. The choice of the latter is critical for the performance of the multilevel method. We introduce a special deblurring prolongation procedure based on TV regularization. Computed examples demonstrate the effectiveness of the method proposed for determining image restora- tions of high quality
2013
LNCS 7893
98
109
S. Morigi, L. Reichel, F. Sgallari (2013). A Cascadic Alternating Krylov Subspace Image Restoration Method. Heidelberg : Kuijper, A.; Bredies, K.; Pock, Th.; Bischof, H. (Eds.).
S. Morigi; L. Reichel; F. Sgallari
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/147252
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