We propose a novel variational framework for image restoration based on the assumption that noise is additive and white. In particular, the proposed variational model uses total variation regularization and forces the resemblance of the residue image to a white noise realization by imposing constraints in the frequency domain. The whiteness constraint constitutes the key novelty behind our approach. The restored image is efficiently computed by the constrained minimization of an energy functional using an alternating directions methods of multipliers procedure. Numerical examples show that the novel approach is particularly suited for textured image restorations.
Serena Morigi, Lanza Alessandro, Fiorella Sgallari (2015). Variational Image Restoration with Constraints on Noise Whiteness. JOURNAL OF MATHEMATICAL IMAGING AND VISION, 53(1), 61-77 [10.1007/s10851-014-0549-5].
Variational Image Restoration with Constraints on Noise Whiteness
MORIGI, SERENA;LANZA, ALESSANDRO;SGALLARI, FIORELLA
2015
Abstract
We propose a novel variational framework for image restoration based on the assumption that noise is additive and white. In particular, the proposed variational model uses total variation regularization and forces the resemblance of the residue image to a white noise realization by imposing constraints in the frequency domain. The whiteness constraint constitutes the key novelty behind our approach. The restored image is efficiently computed by the constrained minimization of an energy functional using an alternating directions methods of multipliers procedure. Numerical examples show that the novel approach is particularly suited for textured image restorations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.