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Proceedings Paper

Phase unwrapping by least squares error minimization of phase curvature
Author(s): Thomas W. Bushman; Michael A. Gennert; Ryszard J. Pryputniewicz
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Paper Abstract

A new method of unwrapping two-dimensional periodically discontinuous phase data is developed in this paper and results from application of the method to electro-optically generated phase data are presented. The method, whose foundations lie in the minimization of the energy of the surface determined by the unwrapped data, fits planar surface patches to previously processed data, then uses the best fit plane's parameters to estimate the value of the pixel under consideration. At each pixel, a new value composed of the sum of the original value and an integral multiple of the magnitude of the phase discontinuity is assigned. Processing proceeds along an expanding wavefront originating from a seed point chosen as the reference for the measurement. The facet based fringe number selection method has been found to be highly reliable even for incomplete, noisy data.

Paper Details

Date Published: 10 December 1993
PDF: 14 pages
Proc. SPIE 2003, Interferometry VI: Techniques and Analysis, (10 December 1993); doi: 10.1117/12.165468
Show Author Affiliations
Thomas W. Bushman, Worcester Polytechnic Institute (United States)
Michael A. Gennert, Worcester Polytechnic Institute (United States)
Ryszard J. Pryputniewicz, Worcester Polytechnic Institute (United States)

Published in SPIE Proceedings Vol. 2003:
Interferometry VI: Techniques and Analysis
Osuk Y. Kwon; Gordon M. Brown; Malgorzata Kujawinska, Editor(s)

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