Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005an....326..143a&link_type=abstract
Astronomische Nachrichten, Vol.326, Issue 2, p.143-149
Astronomy and Astrophysics
Astronomy
4
Image Processing, Techniques: Numerical, Methods: Data Analysis
Scientific paper
We develop a radio astronomical approach to 3D-reconstruction in few projections tomography. It is based on the 2-CLEAN DSA method which consists of two clean algorithms by using a synthesized beam. In complex cases two extreme solutions are used for the analysis of the image structure. These solutions determine the limits of permissible energy redistribution on the image among the components of small and large scales. Two variants of 3D-reconstruction proceeding from a set of two-dimensional projections (3D_2D) and from a set of one-dimensional ones (3D_1D) are considered. It is shown that the quality of 3D_2D-reconstruction should be similar to the quality of 2D_1D-reconstruction if the same number of equally spaced scans is used. But a doubled number of projections is required for 3D_1D-reconstruction. We have simulated 3D-reconstruction of an optically thin emitting object. The present technique is a component of astrotomography and it has good prospects for a wide range of remote sensing.
Agafonov Michail I.
Sharova Olga I.
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