Statistical properties of the photon-address, phase-gradient algorithm.

Details Statistical properties of the photon-address, phase-gradient algorithm. Statistical properties of the photon-address, phase-gradient algorithm.

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989josaa...6...56j&link_type=abstract

Journal of the Optical Society of America A, Vol. 6, No. 1, p. 56 - 61

Computer Science

1

Speckle Interferometry: Methods Of Reduction

Scientific paper

The properties of the phase-gradient algorithm for retrieving the Fourier phase from stellar speckle images are examined with respect to random image motion, centroiding, photon noise, and stray photons. The phase gradient is found to be immune to the degradation from image motion and distortions at low photon levels that occur in the Knox-Thompson process. The signal-to-noise ratios of the two methods are found to be comparable. Bias terms that are due to stray photons caused by background light or detector noise are derived.

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