Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986eri..rept.....f&link_type=abstract
Final Report, 1 Mar. 1982 - 31 Oct. 1985 Environmental Research Inst. of Michigan, Ann Arbor.
Astronomy and Astrophysics
Astronomy
Algorithms, Astronomy, Atmospheric Circulation, Atmospheric Refraction, Boundary Value Problems, Image Processing, Imaging Techniques, Specular Reflection, Distortion, Fourier Series, Interferometers, Recursive Functions, Speckle Patterns
Scientific paper
This report investigate methods for obtaining diffraction limited images of space objects, despite the turbulent atmosphere, by reconstructing images from data provided by optical interferometers (particularly stellar speckle interferometry). Major accomplishments include the following: (1) A new closed form recursive algorithm was invented for reconstructing sampled objects having latent reference points. (2) Improvements in the iterative Fourier transform algorithm were devised, solving the stagnation problems of stripes and of simultaneous twin images. (3) Uniqueness of the reconstructed image was demonstrated empirically. (4) Reconstruction of complex valued objects was shown to to be possible. (5) The Hayes Quatieri recursive algorithm was shown to suffer from a uniqueness problem, and that algorithm was generalized. (6) An improved method for estimating the object's Fourier modulus from stellar speckle interferometry data was devised.
Fienup James R.
Wackerman Christopher C.
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