Algorithm for fringe pattern normalization

In this work we present a new algorithm for fringe pattern normalization, that is, background suppression and modulation normalization. Normalization is necessary for several fringe pattern processing techniques. For example, this is the case of the regularization and phase sampling methods. In gene...

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Veröffentlicht in:Optics communications 2001-09, Vol.197 (1), p.43-51
Hauptverfasser: Quiroga, Juan Antonio, Antonio Gómez-Pedrero, José, Garcı́a-Botella, Ángel
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container_end_page 51
container_issue 1
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container_title Optics communications
container_volume 197
creator Quiroga, Juan Antonio
Antonio Gómez-Pedrero, José
Garcı́a-Botella, Ángel
description In this work we present a new algorithm for fringe pattern normalization, that is, background suppression and modulation normalization. Normalization is necessary for several fringe pattern processing techniques. For example, this is the case of the regularization and phase sampling methods. In general, background suppression can be accomplished by high-pass filtering, however if modulation is not constant or almost constant over the field of view, normalization is a difficult task. The solution proposed is based in the use of two orthogonal bandpass filters, from which a normalized irradiance distribution is obtained. We have applied the method to simulated as well as experimental data with good results.
doi_str_mv 10.1016/S0030-4018(01)01440-7
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subjects Background suppression
Computers in experimental physics
Exact sciences and technology
Fourier transform
Fringe pattern processing
Image processing
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Interferometers
Normalization
Optical instruments, equipment and techniques
Optical metrology
Physics
title Algorithm for fringe pattern normalization
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