29 January 1988 Image Reconstruction In The Presence Of Noise
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Correlographic image reconstruction, using pupil-plane intensity patterns generated by a coherently-illuminated object, has been simulated O and has successfully reproduced the density mask used to drive the simulation. We describe a set of experiments in which a physical object was illuminated, and detector-plane intensity readouts were used as the input to correlographic reconstruction software. The effects of dark current bias, finite analog-to-digital conversion error, and additive noise are evaluated. The correlogram construction process includes inward extrapolation for smoothing of the D.C. spike. The phase retrieval process includes annealing and median filtering. As compared with the simulated results, the experimental results show greater difficulty in convergence and a lower fidelity in the reconstructed image.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. C. Watson, D. C. Watson, L. B. Race, L. B. Race, } "Image Reconstruction In The Presence Of Noise", Proc. SPIE 0828, Digital Image Recovery and Synthesis, (29 January 1988); doi: 10.1117/12.942092; https://doi.org/10.1117/12.942092

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