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Blur-Kernel Estimation from Spectral Irregularities

Speaker  Raanan Fattal

Affiliation  Hebrew University

Host  Rick Szeliski

Duration  00:51:22

Date recorded  18 July 2013

I will describe a new method for recovering the blur in motion-blurred images based on statistical irregularities their power spectrum exhibits. This is achieved by a power-law that refines the one traditionally used for describing natural images. The new model better accounts for biases arising from the presence of large and strong edges in the image. In our approach we use this model together with an accurate spectral whitening formula to estimate the power spectrum of the blur. The blur kernel is then recovered using a phase retrieval algorithm with improved convergence and disambiguation capabilities. Unlike many existing methods, the new approach does not perform a maximum a posteriori estimation, which involves repeated reconstructions of the latent image, and hence offers favorable running times.

I will also present a comparison between the new method with state-of-the-art methods and report various advantages, both in terms of efficiency and accuracy.

This is a joint work with Amit Goldstein

Project page (code available):
http://www.cs.huji.ac.il/~raananf/projects/deblur/

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> Blur-Kernel Estimation from Spectral Irregularities