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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 35, Iss. 25 — Sep. 1, 1996
  • pp: 5108–5114

Comparison of phase-unwrapping algorithms by using gradient of first failure

Peter Ettl and Katherine Creath  »View Author Affiliations


Applied Optics, Vol. 35, Issue 25, pp. 5108-5114 (1996)
http://dx.doi.org/10.1364/AO.35.005108


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Abstract

The comparison of phase-unwrapping algorithms has been an enigma because there has been no quantitative means of comparison. Noting that unwrapping routines are sensitive to noise and the local gradient of the phase array as well as fringe modulation, we have linked unwrapping performance to the gradient of first failure of the algorithm. When the gradient of first failure is plotted versus the signal-to-noise ratio, this can be used as an indicator of which algorithm to use in a given situation without the need for user intervention during the measurement and calculation. This study introduces three algorithms developed for their trade-offs in speed versus pixel noise (pointwise) sensitivity. The algorithms developed have been applied to live, noisy measurement data and have been proven to be robust.

© 1996 Optical Society of America

History
Original Manuscript: August 28, 1995
Revised Manuscript: March 11, 1996
Published: September 1, 1996

Citation
Peter Ettl and Katherine Creath, "Comparison of phase-unwrapping algorithms by using gradient of first failure," Appl. Opt. 35, 5108-5114 (1996)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-35-25-5108


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References

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