Image reconstruction by the wavelet transform applied to aperture synthesis

Details Image reconstruction by the wavelet transform applied to aperture synthesis Image reconstruction by the wavelet transform applied to aperture synthesis

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...283..349s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 283, no. 1, P. 349-360

Astronomy and Astrophysics

Astrophysics

18

Fast Fourier Transformations, Image Reconstruction, Synthetic Apertures, Wavelet Analysis, Image Processing, Pattern Recognition, Speckle Interferometry

Scientific paper

The Wavelet Transform is a tool which allows us to get information both in the direct space and in the frequency space. We have developed an algorithm based on the Fast Fourier Transformations (FFT) with an isotropic wavelet. A multiresolution deconvolution is performed for the interferometric images by using the CLEAN method on the wavelet coefficients. An iterative reconstruction assumes the existence of a solution which satisfies the positivity and the limited support constraints, and which is compatible with the measured visibilities. By this method, the images of two evolved stars have been reconstructed from infrared speckle interferometry observations.

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