Transfer function estimation for spaceborne telescopes

Author

Le Besnerais, G. ; Mugnier, L.M.

Author_Institution

Office Nat. d´´Etudes et de Recherches Aerospatiales, Chatillon, France

Volume

1

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

826

Abstract

The on-orbit calibration of the transfer function (TF) of a spaceborne optical telescope is of paramount importance for the restoration of its recorded images. The authors propose a novel method based on a physical modeling of the TF and on the automatic extraction from the image of sub-images containing appropriate patterns such as step functions. A least-square criterion is computed with all the extracted subimages, and is minimized as a function of the unknowns, which are the TF parameters and the step parameters. The simulation results validate the method and show a precise estimation of the full 2D TF

Keywords

aerospace instrumentation; astronomical telescopes; calibration; image restoration; least mean squares methods; optical transfer function; 2D transfer function estimation; automatic image extraction; least-square criterion; on-orbit calibration; physical modeling method; recorded image restoration; simulation results; spaceborne optical telescope; step functions; step parameters; sub-images; transfer function parameters; Calibration; Computational modeling; Frequency estimation; Image restoration; Instruments; Markov random fields; Optical recording; Polynomials; Telescopes; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 2001. Proceedings. 2001 International Conference on

Conference_Location

Thessaloniki

Print_ISBN

0-7803-6725-1

Type

conf

DOI

10.1109/ICIP.2001.959173

Filename

959173