M. ZEMMAMOUCHE Redouane

MCB

Directory of teachers

Department

Departement of MECHANICAL ENGINEERING

Research Interests

Non-destructive testing/optical Techniques

Contact Info

University of M'Sila, Algeria

Email : redouane.zemmamouche@univ-msila.dz

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Recent Publications

2018

Accuracy concerns in digital speckle photography combined with Fresnel digital holographic interferometry

Electronic speckle photography is an accurate, easy-to-use, video-based technique for the analysis of two- and three-dimensional deformation fields and in-plane strain fields, based on numerical cross correlation. Through the use of statistical optics, simulated speckle patterns, and experiments the accuracy in electronic speckle photography was found to depend on correlation, speckle size, window size, and correlation filter. The estimated correlation was found to be the combined effect of three mutually competing factors because of classical speckle correlation, subimage overlap, and displacement gradients. In many applications white-light speckle patterns provide a more accurate estimate of the displacement field than do laser speckle patterns.
Citation

M. ZEMMAMOUCHE Redouane, (2018), "Accuracy concerns in digital speckle photography combined with Fresnel digital holographic interferometry", [national] Optics and Lasers in Engineering , ELSEVIER Ltd

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2017

Accuracy improvement in digital holographic-based speckle correlation for three-dimensional (3D) displacement measurement

Combination of digital holography and speckle correlation for three-dimensional displacement measurement suffers from inaccuracy. Speckle size adjustment and phase error correction during the digital holography process can improve the accuracy of in-plane displacement measurement.
Citation

M. ZEMMAMOUCHE Redouane, (2017), "Accuracy improvement in digital holographic-based speckle correlation for three-dimensional (3D) displacement measurement", [international] Digital Holography and Three-Dimensional Imaging , South Korea

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2016

Combination of digital holography and speckle correlation for simultaneous in-plane and out-of-plane displacements measurement.

Digital holography allows out-of-plane displacements measurement. When zero-padding is applied, the reconstructed object amplitude contains speckle yielding determination of in-plane displacements by speckle correlation. This allows vector displacements measurement or phase restoration after accidental movement.
Citation

M. ZEMMAMOUCHE Redouane, (2016), "Combination of digital holography and speckle correlation for simultaneous in-plane and out-of-plane displacements measurement.", [international] Imaging and Applied Optics Congress , Germany

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2015

Use of specklegrams background terms for speckle photography combined with phase-shifting electronic speckle pattern interferometry.

Electronic speckle pattern interferometry (ESPI) is combined with digital speckle photography (DSP) to measure out-of-plane deformation in the presence of large in-plane translation or rotation. ESPI is used to measure out-of-plane displacements smaller than the speckle diameter. In-plane displacements larger than the speckle size are obtained by DSP using artifacts images computed from the phase-stepped specklegrams. Previous works use the specklegram modulation for that purpose, but we show that this can lead to errors in the case of low modulation. In order to avoid this, a simple averaging of phase-stepped specklegrams allows obtaining the average irradiance, which contains information on the speckled object image. The latter can be used more efficiently than the modulation in DSP and is simpler to compute. We also perform a numerical simulation of specklegrams, which show that the use of background terms is much more stable against some error sources as compared to modulation. We show experimental evidence of this in various experiments combining out-of-plane ESPI measurements with in-plane translations or rotations obtained by our DSP method. The latter has been used efficiently to restore phase loss in out-of-plane ESPI measurements due to large in-plane displacements.
Citation

M. ZEMMAMOUCHE Redouane, (2015), "Use of specklegrams background terms for speckle photography combined with phase-shifting electronic speckle pattern interferometry.", [national] Optical Engineering , SPIE

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