Spatial carrier fringe pattern phase demodulation by use of a two-dimensional real wavelet
Applied Optics, Vol. 48, Issue 36, pp. 6893-6906 (2009)
http://dx.doi.org/10.1364/AO.48.006893
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Abstract
A two-dimensional continuous wavelet transform employing a real mother wavelet is applied to phase analysis of spatial carrier fringe patterns. In this method, a Hilbert transform is first performed on a carrier fringe pattern to get an analytic signal. Then a two-dimensional wavelet transform is calculated for the signal that is yielded by the first transform. Finally, the height-demodulated phase information can be gotten from the wavelet transform coefficients at the wavelet ridge position. The performance of the proposed method has been evaluated by using computer-generated and real fringe patterns. The result performed better than that of one-dimensional real wavelet transform algorithms in the area with phase discontinuous points and high phase variation, especially when there is much noise in the fringe patterns. Computer simulations and experiments verified the validity of the proposed method.
© 2009 Optical Society of America
OCIS Codes
(100.2650) Image processing : Fringe analysis
(100.5070) Image processing : Phase retrieval
(100.7410) Image processing : Wavelets
ToC Category:
Image Processing
History
Original Manuscript: July 22, 2009
Revised Manuscript: October 23, 2009
Manuscript Accepted: November 19, 2009
Published: December 10, 2009
Citation
Sikun Li, Xianyu Su, and Wenjing Chen, "Spatial carrier fringe pattern phase demodulation by use of a two-dimensional real wavelet," Appl. Opt. 48, 6893-6906 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-36-6893
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