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Applied Optics

Applied Optics


  • Vol. 37, Iss. 20 — Jul. 10, 1998
  • pp: 4504–4509

Generalized spin filtering and an improved derivative-sign binary image method for the extraction of fringe skeletons

Qifeng Yu, Xiaolin Liu, and Xiangyi Sun  »View Author Affiliations

Applied Optics, Vol. 37, Issue 20, pp. 4504-4509 (1998)

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Generalized spin filters, including several directional filters such as the directional median filter and the directional binary filter, are proposed for removal of the noise of fringe patterns and the extraction of fringe skeletons with the help of fringe-orientation maps (FOM’s). The generalized spin filters can filter off noise on fringe patterns and binary fringe patterns efficiently, without distortion of fringe features. A quadrantal angle filter is developed to filter off the FOM. With these new filters, the derivative-sign binary image (DSBI) method for extraction of fringe skeletons is improved considerably. The improved DSBI method can extract high-density skeletons as well as common density skeletons.

© 1998 Optical Society of America

OCIS Codes
(100.2650) Image processing : Fringe analysis
(120.2440) Instrumentation, measurement, and metrology : Filters
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

Original Manuscript: November 18, 1997
Revised Manuscript: April 1, 1998
Published: July 10, 1998

Qifeng Yu, Xiaolin Liu, and Xiangyi Sun, "Generalized spin filtering and an improved derivative-sign binary image method for the extraction of fringe skeletons," Appl. Opt. 37, 4504-4509 (1998)

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