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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 5 — Feb. 10, 1999
  • pp: 795–804

Fringe-orientation estimation by use of a Gaussian gradient filter and neighboring-direction averaging

Xiang Zhou, John P. Baird, and John F. Arnold  »View Author Affiliations


Applied Optics, Vol. 38, Issue 5, pp. 795-804 (1999)
http://dx.doi.org/10.1364/AO.38.000795


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Abstract

We analyze the effect of image noise on the estimation of fringe orientation in principle and interpret the application of a texture-analysis technique to the problem of estimating fringe orientation in interferograms. The gradient of a Gaussian filter and neighboring-direction averaging are shown to meet the requirements of fringe-orientation estimation by reduction of the effects of low-frequency background and contrast variances as well as high-frequency random image noise. The technique also improves inaccurate orientation estimation at low-modulation points, such as fringe centers and broken fringes. Experiments demonstrate that the scales of the Gaussian gradient filter and the direction averaging should be chosen according to the fringe spacings of the interferograms.

© 1999 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(100.2650) Image processing : Fringe analysis

History
Original Manuscript: May 14, 1998
Revised Manuscript: September 28, 1998
Published: February 10, 1999

Citation
Xiang Zhou, John P. Baird, and John F. Arnold, "Fringe-orientation estimation by use of a Gaussian gradient filter and neighboring-direction averaging," Appl. Opt. 38, 795-804 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-5-795

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