Phase-gradient reconstruction from photon-limited stellar speckle images
Abstract
The phase-gradient process for reconstructing stellar speckle images is implemented in a photon-address mode for application to images containing small numbers of photons. Comparisons are made with an address-mode Knox-Thompson process which show that the phase-gradient approach has computational advantages and better SNR performance. Reconstructions from simulated data and real data for the binary source Beta Delphinius are presented.
- Publication:
-
Applied Optics
- Pub Date:
- October 1987
- DOI:
- 10.1364/AO.26.004246
- Bibcode:
- 1987ApOpt..26.4246A
- Keywords:
-
- Astronomical Photography;
- Computational Astrophysics;
- Image Reconstruction;
- Speckle Interferometry;
- Speckle Patterns;
- Data Correlation;
- Noise Reduction;
- Signal To Noise Ratios;
- Stellar Spectra;
- Instrumentation and Photography;
- IMAGE PROCESSING;
- IMAGE RECONSTRUCTION;
- ASTRONOMY;
- SPECKLE PHENOMENA