Abstract

A simple but powerful improvement of the shift-and-add method for the restoration of astronomical images is presented. In this modified algorithm, the shift vector and weight of a specklegram are estimated by computing the cross correlation between the specklegram and the current average before shifting the specklegram and updating the average. In this sense, all the information contained in the specklegrams is used for maximizing the coherence during the averaging process. Numerical simulations indicate that the suggested modification widens the applicability of the shift-and-add method to extended objects without the appearance of ghost images.

© 1990 Optical Society of America

Full Article  |  PDF Article
More Like This
Image restoration by the shift-and-add algorithm

William G. Bagnuolo
Opt. Lett. 10(5) 200-202 (1985)

Self-calibrating shift-and-add technique for speckle imaging

Julian C. Christou, E. Keith Hege, Jonathan D. Freeman, and Erez Ribak
J. Opt. Soc. Am. A 3(2) 204-209 (1986)

Self-deconvolution for shift-and-add imaging

Yoshifumi Sudo and Naoshi Baba
Opt. Lett. 30(11) 1309-1311 (2005)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

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 OSA member, or as an authorized user of your institution.

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

Figures (3)

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

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

Tables (2)

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

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

Metrics

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

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