Speckle pattern processing by digital image correlation

Gubarev, Fedor A.; Li, Lin; Klenovskii, M. S.; Glotov, Anatoliy

doi:10.1051/matecconf/20164804003

Cited by 19 publications

(7 citation statements)

References 19 publications

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“…Therefore, when there are speckle patterns at the output of a MOF, correlation techniques are usually employed to quantify the changes due to these disturbances. This technique is carried out through the algebraic implementation of the correlation coefficient given by [21]:…”

Section: Analysis Of Specklegramsmentioning

confidence: 99%

Numerical study using finite element method for the thermal response of fiber specklegram sensors with changes in the length of the sensing zone

et al. 2021

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The response of fiber specklegram sensors (FSSs) is given as function of variations in the intensity distribution of the modal interference pattern or speckle pattern induced by external disturbances. In the present work, the behavior of a FSS sensing scheme under thermal perturbations is studied by means of computational simulations of the speckle patterns. These simulations are generated by applying the finite element method (FEM) to the modal interference in optical fibers as a function of the thermal disturbance and the length of the sensing zone. A correlation analysis is performed on the images generated in the simulations to evaluate the dependence between the changes in the speckle pattern grains and the intensity of the applied disturbance. The numerical simulation shows how the building characteristic of the length of sensing zone, combined with image processing, can be manipulated to control the metrological performance of the sensors.

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Section: Analysis Of Specklegramsmentioning

confidence: 99%

Numerical study using finite element method for the thermal response of fiber specklegram sensors with changes in the length of the sensing zone

et al. 2021

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“…La implementación algebraica de esta técnica se puede llevar a cabo por medio de varias expresiones similares. (Efendioglu, 2017;Gubarev, Li, Klenovskii, & Glotov, 2016), aunque la más común es el coeficiente de correlación (C) dado por:…”

Section: Análisis Teóricounclassified

Specklegramas de fibra óptica analizados mediante procesamiento digital de imágenes

Gutiérrez

Castaño

Gómez

et al. 2018

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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Los sensores basados en el análisis de la distribución de intensidades del patrón de interferencia modal a la salida de una fibra óptica son conocidos como sensores ópticos basados en specklegramas de fibra óptica (Fiber Specklegram Sensors, FSSs). En este trabajo se muestran los specklegramas, simulados numéricamente mediante el método de los elementos finitos, de una fibra óptica Thorlabs 1550BHP perturbada mecánicamente, y se hace uso de la información global o de regiones del specklegrama mediante el procesamiento digital de imágenes a través de un análisis de correlación. Los resultados muestran como la correlación entre imágenes se puede usar como valor de cuantificación para la medición de fuerzas, y cómo la división del patrón por zonas de interés puede mejorar las características metrológicas del sensor. © 2018. Acad. Colomb. Cienc. Ex. Fis. Nat.

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“…Recorded images were transferred to a computer for further processing. The description of the speckle patterns processing method and the results of its testing are given in [21].…”

Section: Experimental Techniquesmentioning

confidence: 99%

The Influence of the Radiation Source Parameters on the Accuracy of Digital Speckle Correlation Method

Gubarev

2016

MATEC Web Conf.

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Abstract. The article presents the impact of the laser radiation divergence and the wavelength on the harmonic distortion detection, as well as the influence of the distance between the optical circuit elements on the harmonic distortion and the sensitivity of amplitude. The research was made by recording the speckle images from the vibrating surface of the object with its digital processing later.

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Speckle pattern processing by digital image correlation

Cited by 19 publications

References 19 publications

Numerical study using finite element method for the thermal response of fiber specklegram sensors with changes in the length of the sensing zone

Numerical study using finite element method for the thermal response of fiber specklegram sensors with changes in the length of the sensing zone

Specklegramas de fibra óptica analizados mediante procesamiento digital de imágenes

The Influence of the Radiation Source Parameters on the Accuracy of Digital Speckle Correlation Method

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