Spatially Varying Blur Recovery - Diagonal Approximations in the Wavelet Domain

Paul Escande, Pierre Weiss, Francois Malgouyres

2013

Abstract

Restoration of images degraded by spatially varying blurs is an issue of increasing importance. Many new optical systems allow to know the system point spread function at some random locations, by using microscopic luminescent structures. Given a set of impulse responses, we propose a fast and efficient algorithm to reconstruct the blurring operator in the whole image domain. Our method consists in finding an approximation of the integral operator by operators diagonal in the wavelet domain. Interestingly, this method complexity scales linearly with the image size. It is thus applicable to large 3D problems. We show that this approach might outperform previously proposed strategies such as linear interpolations (Nagy and O’Leary, 1998) or separable approximations (Zhang et al., 2007). We provide various theoretical and numerical results in order to justify the proposed methods.

Paper Citation

in Harvard Style

Escande P., Weiss P. and Malgouyres F. (2013). Spatially Varying Blur Recovery - Diagonal Approximations in the Wavelet Domain . In Proceedings of the 2nd International Conference on Pattern Recognition Applications and Methods - Volume 1: ICPRAM, ISBN 978-989-8565-41-9, pages 222-228. DOI: 10.5220/0004308202220228

in Bibtex Style

@conference{icpram13,
author={Paul Escande and Pierre Weiss and Francois Malgouyres},
title={Spatially Varying Blur Recovery - Diagonal Approximations in the Wavelet Domain},
booktitle={Proceedings of the 2nd International Conference on Pattern Recognition Applications and Methods - Volume 1: ICPRAM,},
year={2013},
pages={222-228},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004308202220228},
isbn={978-989-8565-41-9},
}

in EndNote Style

TY - CONF
JO - Proceedings of the 2nd International Conference on Pattern Recognition Applications and Methods - Volume 1: ICPRAM,
TI - Spatially Varying Blur Recovery - Diagonal Approximations in the Wavelet Domain
SN - 978-989-8565-41-9
AU - Escande P.
AU - Weiss P.
AU - Malgouyres F.
PY - 2013
SP - 222
EP - 228
DO - 10.5220/0004308202220228