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Optical Engineering

Investigation to realize a computationally efficient implementation of the high-order instantaneous-moments-based fringe analysis method
Author(s): Sai Siva Gorthi; G. Rajshekhar; Pramod Kumar Rastogi
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Paper Abstract

Recently, a high-order instantaneous moments (HIM)-operator-based method was proposed for accurate phase estimation in digital holographic interferometry. The method relies on piece-wise polynomial approximation of phase and subsequent evaluation of the polynomial coefficients from the HIM operator using single-tone frequency estimation. The work presents a comparative analysis of the performance of different single-tone frequency estimation techniques, like Fourier transform followed by optimization, estimation of signal parameters by rotational invariance technique (ESPRIT), multiple signal classification (MUSIC), and iterative frequency estimation by interpolation on Fourier coefficients (IFEIF) in HIM-operator-based methods for phase estimation. Simulation and experimental results demonstrate the potential of the IFEIF technique with respect to computational efficiency and estimation accuracy.

Paper Details

Date Published: 1 June 2010
PDF: 4 pages
Opt. Eng. 49(6) 065802 doi: 10.1117/1.3454376
Published in: Optical Engineering Volume 49, Issue 6
Show Author Affiliations
Sai Siva Gorthi, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
G. Rajshekhar, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Pramod Kumar Rastogi, Ecole Polytechnique Fédérale de Lausanne (Switzerland)

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