Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T04:44:02.262Z Has data issue: false hasContentIssue false
  • English
  • Français

The Information of Images and Its Dependence on Noise and Spatial Resolution

Published online by Cambridge University Press:  12 April 2016

Peter M.W. Kalberla
Peter M.W. Kalberla*
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, F.R.G.

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Radioastronomical observations are often incomplete in the sense that either the angular resolution desired or the signal-to-noise ratio required are not adequate. Attempts to fill in the missing information by either smoothing or deconvolving the observed data date back to Bracewell (1956, 1958). More recently the need for more sophisticated restoration procedures has increased since observations with radioastronomical interferometers frequently suffer from incomplete coverage of the u – v plane. Procedures like CLEAN (Högbom 1974, Schwarz 1978) and MEM (Wernecke 1977, Gull and Daniell 1978) have been developed to interpolate the unknown data in the u – v plane.

Type
Part V: Maximum Entropy Image Reconstruction
Information
International Astronomical Union Colloquium , Volume 49: Image Formation from Coherence Functions in Astronomy , 1979 , pp. 249 - 255
Copyright
Copyright © Reidel 1979

References

Bracewell, R.N: 1956, Aust. J. Phys. 9, pp. 297 Google Scholar
Bracewell, R.N: 1958, Proc. IRE 46, pp. 106 CrossRefGoogle Scholar
Brillouin, L.: 1963, “Science and Information Theory”, Academic Press Inc., New York.Google Scholar
Gassmann, J.: 1977, Optik 48, pp. 347 Google Scholar
Gull, S.T. and Daniell, G.J.: 1978, Nature 272, pp. 686 Google Scholar
Högbom, J.A.: 1974, Astron. Astrophys. Suppl. 15, pp. 417 Google Scholar
Kalberla, P.M.W.: 1978, Thesis, Bonn.Google Scholar
Schwarz, U.J.: 1978, Astron. Astrophys. 65, pp. 345.Google Scholar
Wernecke, S.J.: 1977, Radio Science 12, pp. 831 CrossRefGoogle Scholar