Adaptive monogenic filtering and normalization of ESPI fringe patterns | Zendy

J. A. Guerrero | Zendy; José L. Marroquín | Zendy; Mariano Rivera | Zendy; Juan Antonio Quiroga | Zendy

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Adaptive monogenic filtering and normalization of ESPI fringe patterns

Author(s) -

J. A. Guerrero,

José L. Marroquín,

Mariano Rivera,

Juan Antonio Quiroga

Publication year - 2005

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.30.003018

Subject(s) - electronic speckle pattern interferometry , optics , demodulation , normalization (sociology) , linear filter , speckle pattern , speckle noise , filter (signal processing) , band pass filter , spatial filter , interferometry , computer science , isotropy , image processing , physics , artificial intelligence , computer vision , image (mathematics) , telecommunications , channel (broadcasting) , sociology , anthropology

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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