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Title: Nonlinear camera response functions and image deblurring
Authors: Kim, S.
Tai, Y.-W.
Kim, S.J.
Brown, M.S. 
Matsushita, Y.
Issue Date: 2012
Citation: Kim, S.,Tai, Y.-W.,Kim, S.J.,Brown, M.S.,Matsushita, Y. (2012). Nonlinear camera response functions and image deblurring. Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition : 25-32. ScholarBank@NUS Repository.
Abstract: This paper investigates the role that nonlinear camera response functions (CRFs) have on image deblurring. In particular, we show how nonlinear CRFs can cause a spatially invariant blur to behave as a spatially varying blur. This can result in noticeable ringing artifacts when deconvolution is applied even with a known point spread function (PSF). In addition, we show how CRFs can adversely affect PSF estimation algorithms in the case of blind deconvolution. To help counter these effects, we introduce two methods to estimate the CRF directly from one or more blurred images when the PSF is known or unknown. While not as accurate as conventional CRF estimation algorithms based on multiple exposures or calibration patterns, our approach is still quite effective in improving deblurring results in situations where the CRF is unknown. © 2012 IEEE.
Source Title: Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition
ISBN: 9781467312264
ISSN: 10636919
DOI: 10.1109/CVPR.2012.6247654
Appears in Collections:Staff Publications

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