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Measurement of the point-spread function of a noisy imaging system

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Claxton, Christopher David, 1980- and Staunton, R. C.. (2008) Measurement of the point-spread function of a noisy imaging system. Journal Optical Society America A, Vol.25 (No.1). pp. 159-170. ISSN 1084-7529

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Official URL: http://dx.doi.org/10.1364/JOSAA.25.000159

Abstract

The averaged point-spread function (PSF) estimation of an image acquisition system is important for many computer vision applications, including edge detection and depth from defocus. The paper compares several mathematical models of the PSF and presents an improved measurement technique that enables subpixel estimation of 2D functions. New methods for noise suppression and uneven illumination modeling were incorporated. The PSF was computed from an ensemble of edge-spread function measurements. The generalized Gaussian was shown to be an 8 times better fit to the estimated PSF than the Gaussian and a 14 times better fit than the pillbox model.

Item Type:	Journal Article
Subjects:	Q Science > QA Mathematics
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Computer vision -- Mathematical models
Journal or Publication Title:	Journal Optical Society America A
Publisher:	Optical Society of America
ISSN:	1084-7529
Date:	January 2008
Volume:	Vol.25
Number:	No.1
Number of Pages:	12
Page Range:	pp. 159-170
Identification Number:	10.1364/JOSAA.25.000159
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
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URI:	http://wrap.warwick.ac.uk/id/eprint/30614