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Blind and Semi-Blind Deblurring of Natural Images

Almeida, M. ; Almeida , L.

IEEE Transactions on Image Processing Vol. 19, Nº 1, pp. 36 - 52 , January, 2010.

ISSN (print): 1057-7149
ISSN (online): 1057-7149

Journal Impact Factor: 3,315 (in 2008)

Digital Object Identifier: 10.1109/TIP.2009.2031231

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Abstract
A method for blind image deblurring is presented.
The method only makes weak assumptions about the blurring filter, and is able to undo a wide variety of blurring degradations. To overcome the ill-posedness of the blind image deblurring problem, the method includes a learning technique which initially focuses on the main edges of the image and gradually takes
details into account. A new image prior, which includes a new edge detector, is used.

The method is able to handle unconstrained blurs, but also allows the use of constraints or of prior information on the blurring filter, as well as the use of filters defined in a parametric manner. Furthermore, it works in both single-frame and multiframe scenarios. The use of constrained blur models appropriate to the problem at hand, and/or of multi-frame scenarios, generally
improves the deblurring results.

Tests performed on monochrome and color images, with
various synthetic and real-life degradations, without and with noise, in single-frame and multi-frame scenarios, showed good results, both in subjective terms and in terms of a the increase of signal to noise ratio (ISNR) measure. In comparisons with other state of the art methods, our method yields better results, and
shows to be applicable to a much wider range of blurs.