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Proceedings Paper

Noise Properties Of Images Reconstructed From Fourier Modulus
Author(s): G. B. Feldkamp; J. R. Fienup
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Paper Abstract

Computer experiments were performed to determine the effects of photon noise on reconstructing images from stellar speckle interferometer data. Estimates of the modulus of the Fourier transform of an extended space object were computed using the method of Labeyrie on degraded images simulated to include the effects of atmospheric turbulence and photon noise (Poisson statistics). Several Fourier modulus estimates with different signal-to-noise ratios were computed by assuming different brightness levels (photons per pixel) for the object in each case. Images were reconstructed from the Fourier modulus estimates using an iterative method based on the nonnegativity of the object. It was found that the rms error of a reconstructed image is roughly equal to the square root of the rms error of the Fourier modulus estimate.

Paper Details

Date Published: 22 August 1980
PDF: 10 pages
Proc. SPIE 0231, 1980 Intl Optical Computing Conf I, (22 August 1980);
Show Author Affiliations
G. B. Feldkamp, Environmental Research Institute of Michigan (United States)
J. R. Fienup, Environmental Research Institute of Michigan (United States)

Published in SPIE Proceedings Vol. 0231:
1980 Intl Optical Computing Conf I
William T. Rhodes, Editor(s)

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