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Optical Engineering

New Technique For Blind Deconvolution
Author(s): S. C. Pohlig; D. E. Dudgeon; A. V. Oppenheim; J. S. Lim; A. E. Filip
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Paper Abstract

Frequently an image may be blurred by a point spread function whose details are not known exactly. In such a case, it is necessary to estimate the point spread function before deconvolving the blurred image. This paper presents a new technique for estimating a zero phase blurring function when its optical transfer function is smooth. The estimate is obtained by smoothing the spectral magnitude of the image and comparing it to an average magnitude that is also smoothed. The average magnitude is obtained by averaging over an ensemble of similar images. The estimate can be extended to degradations such as a defocused lens by thresholding the estimation magnitude to obtain zero crossings and adjusting the phase accordingly. In particular, this technique can be applied to a circularly symmetric Gaussian blur or a defocused lens with a circular aperture.

Paper Details

Date Published: 1 April 1981
PDF: -280 pages
Opt. Eng. 20(2) 202281 doi: 10.1117/12.7972705
Published in: Optical Engineering Volume 20, Issue 2
Show Author Affiliations
S. C. Pohlig, Massachusetts Institute of Technology (United States)
D. E. Dudgeon, Massachusetts Institute of Technology (United States)
A. V. Oppenheim, Massachusetts Institute of Technology (United States)
J. S. Lim, Massachusetts Institute of Technology (United States)
A. E. Filip, Massachusetts Institute of Technology (United States)

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