IMAGE-RECONSTRUCTION BY THE WAVELET TRANSFORM APPLIED TO APERTURE SYNTHESIS

The Wavelet Transform is a tool which allows us to get information bot h in the direct space and in the frequency space. We have developed an algorithm based on the FFT with an isotropic wavelet. A multiresoluti on deconvolution is performed for the interferometric images by using the CLEAN method on the wavelet coefficients. An iterative reconstruct ion 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 star s have been reconstructed from infrared speckle interferometry observa tions.