Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sval...18..371b&link_type=abstract
Soviet Astronomy Letters, Vol. 18, p. 371; Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 18, no. 10, p. 913-921. In
Astronomy and Astrophysics
Astronomy
Astronomical Spectroscopy, Integral Transformations, Speckle Interferometry, Autocorrelation, Brightness Distribution, Fourier Transformation, Least Squares Method
Scientific paper
The possible application of the tripple-correlation Hartley transform correlation (the Hartley bispectrum) to the analysis of short-exposure speckle images is studied. It is shown that the 1D Hartley transform of a strip-distribution of brightness can be obtained from the observed bispectrum using a solution of a nonlinear least-squares problem. A solution to this problem is proposed which takes into account a priori information on the nonnegativity of an image. The solution makes it possible to obtain good stability against stochastic noise, to reduce the required computer memory by a factor of two, and to decrease processing time.
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