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Applied Optics

Applied Optics


  • Vol. 36, Iss. 32 — Nov. 10, 1997
  • pp: 8391–8396

Robust procedure for fringe analysis

Mariano Rivera, Ramon Rodriguez-Vera, and Jose L. Marroquin  »View Author Affiliations

Applied Optics, Vol. 36, Issue 32, pp. 8391-8396 (1997)

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A robust procedure for analyzing fringe patterns obtained from speckle interferometric techniques is proposed. The fringes generally are observed only in a region S of a rectangular lattice L. We give a method for computing (from S) the region R, where the unwrapped phase is to be computed; this computation is done by use of a morphological filter (in particular, a closing filter). We then use a fast-unwrapping algorithm to compute the phase: a preconditioned conjugate-gradient algorithm that uses the discrete Fourier transform.

© 1997 Optical Society of America

Original Manuscript: December 13, 1996
Revised Manuscript: April 18, 1997
Published: November 10, 1997

Mariano Rivera, Ramon Rodriguez-Vera, and Jose L. Marroquin, "Robust procedure for fringe analysis," Appl. Opt. 36, 8391-8396 (1997)

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