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Applied Optics

Applied Optics


  • Vol. 39, Iss. 26 — Sep. 10, 2000
  • pp: 4802–4816

Phase unwrapping with the branch-cut method: role of phase-field direction

Bernd Gutmann and Herbert Weber  »View Author Affiliations

Applied Optics, Vol. 39, Issue 26, pp. 4802-4816 (2000)

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Phase unwrapping with the branch-cut method has been successfully used in many different applications in recent years. Most methods to set the branch cuts minimize the overall cut length. However, this technique fails in different cases, since this criterion is based mainly on statistical examinations. We show how the orientation and direction of the phase map help to create additional physical criteria that can be used to optimize the setting of the branch cuts. We show how these new criteria can be implemented into an energy function that will be minimized by a simulated annealing algorithm in order of a correct setting of the branch cuts. Finally, we present experimental results from electronic speckle pattern interferometry and digital holography phase maps.

© 2000 Optical Society of America

OCIS Codes
(100.5070) Image processing : Phase retrieval
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

Original Manuscript: November 6, 1999
Revised Manuscript: May 8, 2000
Published: September 10, 2000

Bernd Gutmann and Herbert Weber, "Phase unwrapping with the branch-cut method: role of phase-field direction," Appl. Opt. 39, 4802-4816 (2000)

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  20. Images used with the kind permission of Giancarlo Pedrini, Institute for Technical Optics, University of Stuttgart, Stuttgart, Germany.
  21. Image used with the kind permission of the Departement of Physics, Applied Optics, Carl von Ossietzky University, Oldenburg, Germany.

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