Publication: Adaptive monogenic filtering and normalization of ESPI fringe patterns
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2005-11-15
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Optical Society of America
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Abstract
A technique is presented for filtering and normalizing noisy fringe patterns, which may include closed fringes, so that single-frame demodulation schemes may be successfully applied. It is based on the construction of an adaptive filter as a linear combination of the responses of a set of isotropic bandpass filters. The space-varying coefficients are proportional to the envelope of the response of each filter, which in turn is computed by using the corresponding monogenic image [Felsberg and Sommer, IEEE Trans. Signal Process. 49, 3136 (2001)]. Some examples of demodulation of real Electronic Speckle Pattern Interferometry (ESPI) images patterns are presented.
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© 2005 Optical Society of America.
J. L. Marroquín (jlm@fractal.cimat.mx) and M. Rivera were supported in part by grants 46270 and
40722 from the Consejo Nacional de Ciencia y Tecnología, México; J. A. Quiroga was supported by
grant DPI2002-02104 from the Ministerio Español de Ciencia y Tecnología.
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1. M. Servín, J. L. Marroquín, and J. A. Quiroga, J. Opt. Soc. Am. A 21, 411 (2004).
2. K. G. Larkin, D. J. Bone, and M. A. Oldfield, J. Opt. Soc. Am. A 18, 1862 (2000).
3. J. Kozlowsky and G. Serra, Appl. Opt. 38, 2256 (1999).
4. M. Rivera, J. Opt. Soc. Am. A 22, 1170 (2005).
5. M. Felsberg and G. Sommer, IEEE Trans. Signal Process. 49, 3136 (2001).