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Proceedings Paper

Practical techniques of processing and analyzing speckled fringe pattern in digital speckle interferometry
Author(s): Fang Chen; Christopher T. Griffen; Y.Y. Hung
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Paper Abstract

This paper presents several practical techniques for processing and analyzing speckled fringe patterns. Speckle averaging by known phase shifts or random phase changes is used to acquire quality fringe patterns. Speckle location rearranging is employed to tolerate rigid body motion and speckle rearranging in phase gives enhanced speckle fringe patterns. A simple recursive filter is designed to further suppress speckle noise and an iteration algorithm applied to reconstruct quality fringe patterns. A digital Fourier transformation is utilized to process and analyze carrier like fringe patterns. A computer generated carrier combined with a reconstruction technique is developed to eliminate speckle noise. Combined use of the techniques optimize the results. The techniques and applications are described.

Paper Details

Date Published: 14 June 1995
PDF: 19 pages
Proc. SPIE 2544, Interferometry VII: Techniques and Analysis, (14 June 1995); doi: 10.1117/12.211886
Show Author Affiliations
Fang Chen, Oakland Univ. (United States)
Christopher T. Griffen, Oakland Univ. (United States)
Y.Y. Hung, Oakland Univ. (United States)

Published in SPIE Proceedings Vol. 2544:
Interferometry VII: Techniques and Analysis
Malgorzata Kujawinska; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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