Restoration of differently blurred versions of an image with measurement errors in the PSF's

TitleRestoration of differently blurred versions of an image with measurement errors in the PSF's
Publication TypeJournal Article
Year of Publication1993
AuthorsWard, R. K.
JournalImage Processing, IEEE Transactions on
Pagination369 -381
Date Publishedjul.
Keywordsadditive noise, consistency, deterministic blur, filtering and prediction theory, ill-conditioning characteristics, image reconstruction, image restoration, maximum likelihood filters, measurement errors, noisy measurement, point spread function, Wiener filters

Restoration of an object from T observations is considered. Each image is distorted by a different deterministic blur and additive noise. The point spread function (PSF) for each observation is unknown; however, a noisy measurement of it is available. Taking the errors in measurements of the PSFs into consideration, the maximum-likelihood and Wiener filters are derived. It is shown that these filters give better results when the regression filter and the conventional Wiener filter, i.e., the one which ignores the presence of the noise in the PSFs. The consistency and the ill-conditioning characteristics of the filters are discussed. Regularized forms for these filers are obtained


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