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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 15, Iss. 4 — Apr. 1, 1998
  • pp: 978–992

Iterative multiframe superresolution algorithms for atmospheric-turbulence-degraded imagery

David G. Sheppard, Bobby R. Hunt, and Michael W. Marcellin  »View Author Affiliations


JOSA A, Vol. 15, Issue 4, pp. 978-992 (1998)
http://dx.doi.org/10.1364/JOSAA.15.000978


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Abstract

The subject of interest is the superresolution of atmospheric-turbulence-degraded, short-exposure imagery, where superresolution refers to the removal of blur caused by a diffraction-limited optical system along with recovery of some object spatial-frequency components outside the optical passband. Photon-limited space object images are of particular interest. Two strategies based on multiple exposures are explored. The first is known as deconvolution from wave-front sensing, where estimates of the optical transfer function (OTF) associated with each exposure are derived from wave-front-sensor data. New multiframe superresolution algorithms are presented that are based on Bayesian maximum a posteriori and maximum-likelihood formulations. The second strategy is known as blind deconvolution, in which the OTF associated with each frame is unknown and must be estimated. A new multiframe blind deconvolution algorithm is presented that is based on a Bayesian maximum-likelihood formulation with strict constraints incorporated by using nonlinear reparameterizations. Quantitative simulation of imaging through atmospheric turbulence and wave-front sensing are used to demonstrate the superresolution performance of the algorithms.

© 1998 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.7060) Atmospheric and oceanic optics : Turbulence
(100.0100) Image processing : Image processing

History
Original Manuscript: May 28, 1997
Revised Manuscript: October 13, 1997
Manuscript Accepted: October 27, 1997
Published: April 1, 1998

Citation
David G. Sheppard, Bobby R. Hunt, and Michael W. Marcellin, "Iterative multiframe superresolution algorithms for atmospheric-turbulence-degraded imagery," J. Opt. Soc. Am. A 15, 978-992 (1998)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-15-4-978

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