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Applied Optics

Applied Optics


  • Vol. 34, Iss. 5 — Feb. 10, 1995
  • pp: 781–789

Improved noise-immune phase-unwrapping algorithm

R. Cusack, J. M. Huntley, and H. T. Goldrein  »View Author Affiliations

Applied Optics, Vol. 34, Issue 5, pp. 781-789 (1995)

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An algorithm for unwrapping noisy phase maps has recently been proposed, based on the identification of discontinuity sources that mark the start or end of a 2π phase discontinuity. Branch cuts between sources act as barriers to unwrapping, resulting in a unique phase map that is independent of the unwrapping route. We investigate four methods for optimizing the placement of the cuts. A modified nearest neighbor approach is found to be the most successful and can reliably unwrap unfiltered speckle-interferometry phase maps with discontinuity source densities of 0.05 sources pixel−1.

© 1995 Optical Society of America

Original Manuscript: October 18, 1993
Revised Manuscript: August 1, 1994
Published: February 10, 1995

R. Cusack, J. M. Huntley, and H. T. Goldrein, "Improved noise-immune phase-unwrapping algorithm," Appl. Opt. 34, 781-789 (1995)

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