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Optical Engineering

Deblurring in a noncoherent optical processing system: pupil function synthesis and experimental implementation
Author(s): Ram M. Vasu; V. Boopathi
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Paper Abstract

The bipolar point spread function (PSF) corresponding to the Wiener filter for correcting linear-motion-blurred pictures is implemented in a noncoherent optical processor. The following two approaches are taken for this implementation: (1) the PSF is modulated and biased so that the resulting function is non-negative and (2) the PSF is split into its positive and sign-reversed negative parts, and these two parts are dealt with separately. The phase problem associated with arriving at the pupil function from these modified PSFs is solved using both analytical and combined analytical-iterative techniques available in the literature. The designed pupil functions are experimentally implemented, and deblurring in a noncoherent processor is demonstrated. The postprocessing required (i.e., demodulation in the first approach to modulating the PSF and intensity subtraction in the second approach) are carried out either in a coherent processor or with the help of a PC-based vision system. The deblurred outputs are presented.

Paper Details

Date Published: 1 June 1994
PDF: 9 pages
Opt. Eng. 33(6) doi: 10.1117/12.168862
Published in: Optical Engineering Volume 33, Issue 6
Show Author Affiliations
Ram M. Vasu, Indian Institute of Science (India)
V. Boopathi, Indian Institute of Science (India)

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