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Bayesian deblurring with integrated noise estimation

: Schmidt, Uwe; Schelten, Kevin; Roth, Stefan


IEEE Computer Society:
IEEE Conference on Computer Vision and Pattern Recognition, CVPR 2011 : 20-25 June 2011, Colorado Springs, CO, USA
New York, NY: IEEE, 2011
ISBN: 978-1-4577-0394-2 (Print)
Conference on Computer Vision and Pattern Recognition (CVPR) <29, 2011, Colorado Springs/Colo.>
Fraunhofer IGD ()
image restoration; Markov random fields (MRF); higher-order statistic; computer vision; Monte Carlo sampling; Forschungsgruppe Visual Inference (VINF)

Conventional non-blind image deblurring algorithms involve natural image priors and maximum a-posteriori (MAP) estimation. As a consequence of MAP estimation, separate pre-processing steps such as noise estimation and training of the regularization parameter are necessary to avoid user interaction. Moreover, MAP estimates involving standard natural image priors have been found lacking in terms of restoration performance. To address these issues we introduce an integrated Bayesian framework that unifies non-blind deblurring and noise estimation, thus freeing the user of tediously pre-determining a noise level. A sampling based technique allows to integrate out the unknown noise level and to perform deblurring using the Bayesian minimum mean squared error estimate (MMSE), which requires no regularization parameter and yields higher performance than MAP estimates when combined with a learned high order image prior. A quantitative evaluation demonstrates state-of-the-art results for both non-blind deblurring and noise estimation.