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Proceedings Paper

Histogram equalization of Young's fringes in speckle photography
Author(s): Tushar Singh; Chandra S. Vikram
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Paper Abstract

Young's fringes pattern in speckle photography is a distribution modulated by the diffraction halo. The halo, among other effects, limits countable number of fringes for the analysis. The fringes in the outer boundaries of the halo are buried in noise due to their diminishing maximum modulated intensity. We introduce here the application of histogram equalization to maximize countable number of fringes. We find that the usually decreasing halo intensity becomes uniform by the procedure. Consequently the fringe contrast throughout the pattern becomes practically constant rather than diminishing as we move to higher orders in the halo. Results with experimental patterns are described to establish the usefulness of the procedure.

Paper Details

Date Published: 20 June 2002
PDF: 4 pages
Proc. SPIE 4777, Interferometry XI: Techniques and Analysis, (20 June 2002); doi: 10.1117/12.472246
Show Author Affiliations
Tushar Singh, Georgia Institute of Technology (United States)
Chandra S. Vikram, Univ. of Alabama in Huntsville (United States)


Published in SPIE Proceedings Vol. 4777:
Interferometry XI: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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