Adaptive monogenic filtering and normalization of ESPI fringe patterns

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...

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Bibliographic Details
Published inOptics letters Vol. 30; no. 22; p. 3018
Main Authors Guerrero, J A, Marroquin, J L, Rivera, M, Quiroga, J A
Format Journal Article
LanguageEnglish
Published United States 15.11.2005
Subjects
Algorithms
Image Enhancement - methods
Image Enhancement - standards
Image Interpretation, Computer-Assisted - methods
Image Interpretation, Computer-Assisted - standards
Information Storage and Retrieval - methods
Interferometry - methods
Interferometry - standards
Refractometry - methods
Refractometry - standards
Reproducibility of Results
Sensitivity and Specificity
Signal Processing, Computer-Assisted
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Summary: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.
ISSN:0146-9592
DOI:10.1364/OL.30.003018