Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Implementation of a modified Richardson-Lucy method for image restoration on a massively parallel computer to compensate for space-variant point spread of a charge-coupled-device camera

Not Accessible

Your library or personal account may give you access

Abstract

Several imaging devices are characterized by a space-variant point-spread function (PSF), such as the wide-field/planetary camera of the Hubble Space Telescope (HST). Several techniques for image recovery that use data from such imagers approximate the space-variant PSF by a space-invariant PSF. A modified Richardson-Lucy method is implemented that accommodates the space-variant PSF of the HST as well as corrections for background counts, nonuniform flat field, and readout noise. The implementation runs on the DEC mppl2000 Sx/Model 200 massively parallel computer. Restorations of simulated HST images are obtained with a space-variant PSF and, for comparison, with a space-invariant approximation. Results of these processing methods are compared, and it is found that a residual artifact appears in restorations when a space-invariant PSF is used owing to the mismatch of the PSF kernel used in the restoration and the space-variant one underlying the image acquired with the telescope. This residual artifact is effectively eliminated when the processing is based on the space-variant PSF.

© 1995 Optical Society of America

Full Article  |  PDF Article
More Like This
Massively parallel spatially variant maximum-likelihood restoration of Hubble Space Telescope imagery

A. F. Boden, D. C. Redding, R. J. Hanisch, and J. Mo
J. Opt. Soc. Am. A 13(7) 1537-1545 (1996)

Compensation for readout noise in CCD images

Donald L. Snyder, Carl W. Helstrom, Aaron D. Lanterman, Mohammad Faisal, and Richard L. White
J. Opt. Soc. Am. A 12(2) 272-283 (1995)

Blind deconvolution by means of the Richardson–Lucy algorithm

D. A. Fish, A. M. Brinicombe, E. R. Pike, and J. G. Walker
J. Opt. Soc. Am. A 12(1) 58-65 (1995)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (18)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (4)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (13)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved