Improving Contrast Accuracy and Resolution of Laser Speckle Contrast Imaging Using Two-Dimensional Entropy Algorithm

A two-dimensional entropy laser speckle contrast imaging (E-LSCI) algorithm is proposed to improve the accuracy and resolution of laser speckle contrast imaging (LSCI) systems. Owing to the stable characteristics of two-dimensional entropy in speckle images, it can be used as a reference to correct...

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Autores principales:	Xinglong Liu, Hui Yang, Ran Li
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Laser speckle contrast imaging speckle contrast analysis image two-dimensional entropy contrast accuracy contrast resolution Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/7fb8cdc41adf4b69bdf59c46a54154ca
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id	oai:doaj.org-article:7fb8cdc41adf4b69bdf59c46a54154ca
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spelling	oai:doaj.org-article:7fb8cdc41adf4b69bdf59c46a54154ca2021-11-18T00:05:36ZImproving Contrast Accuracy and Resolution of Laser Speckle Contrast Imaging Using Two-Dimensional Entropy Algorithm2169-353610.1109/ACCESS.2021.3111097https://doaj.org/article/7fb8cdc41adf4b69bdf59c46a54154ca2021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9530680/https://doaj.org/toc/2169-3536A two-dimensional entropy laser speckle contrast imaging (E-LSCI) algorithm is proposed to improve the accuracy and resolution of laser speckle contrast imaging (LSCI) systems. Owing to the stable characteristics of two-dimensional entropy in speckle images, it can be used as a reference to correct contrast. E-LSCI introduces two-dimensional entropy into the contrast ratio calculation. It uses this benchmark and performs normalization to obtain a more accurate contrast ratio. The results of the method validation experiment show that the accuracy and contrast resolution of E-LSCI are higher than those of traditional LSCI by 27% and over 80%, respectively. The results of a finger blocking experiment show that E-LSCI can reduce the variance of contrast ratio at an identical flow velocity and improve the resolution by 25%. The application of this algorithm can improve the contrast accuracy and contrast resolution of laser speckle contrast imaging instruments.Xinglong LiuHui YangRan LiIEEEarticleLaser speckle contrast imagingspeckle contrast analysisimage two-dimensional entropycontrast accuracycontrast resolutionElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 148925-148932 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Laser speckle contrast imaging speckle contrast analysis image two-dimensional entropy contrast accuracy contrast resolution Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Laser speckle contrast imaging speckle contrast analysis image two-dimensional entropy contrast accuracy contrast resolution Electrical engineering. Electronics. Nuclear engineering TK1-9971 Xinglong Liu Hui Yang Ran Li Improving Contrast Accuracy and Resolution of Laser Speckle Contrast Imaging Using Two-Dimensional Entropy Algorithm
description	A two-dimensional entropy laser speckle contrast imaging (E-LSCI) algorithm is proposed to improve the accuracy and resolution of laser speckle contrast imaging (LSCI) systems. Owing to the stable characteristics of two-dimensional entropy in speckle images, it can be used as a reference to correct contrast. E-LSCI introduces two-dimensional entropy into the contrast ratio calculation. It uses this benchmark and performs normalization to obtain a more accurate contrast ratio. The results of the method validation experiment show that the accuracy and contrast resolution of E-LSCI are higher than those of traditional LSCI by 27% and over 80%, respectively. The results of a finger blocking experiment show that E-LSCI can reduce the variance of contrast ratio at an identical flow velocity and improve the resolution by 25%. The application of this algorithm can improve the contrast accuracy and contrast resolution of laser speckle contrast imaging instruments.
format	article
author	Xinglong Liu Hui Yang Ran Li
author_facet	Xinglong Liu Hui Yang Ran Li
author_sort	Xinglong Liu
title	Improving Contrast Accuracy and Resolution of Laser Speckle Contrast Imaging Using Two-Dimensional Entropy Algorithm
title_short	Improving Contrast Accuracy and Resolution of Laser Speckle Contrast Imaging Using Two-Dimensional Entropy Algorithm
title_full	Improving Contrast Accuracy and Resolution of Laser Speckle Contrast Imaging Using Two-Dimensional Entropy Algorithm
title_fullStr	Improving Contrast Accuracy and Resolution of Laser Speckle Contrast Imaging Using Two-Dimensional Entropy Algorithm
title_full_unstemmed	Improving Contrast Accuracy and Resolution of Laser Speckle Contrast Imaging Using Two-Dimensional Entropy Algorithm
title_sort	improving contrast accuracy and resolution of laser speckle contrast imaging using two-dimensional entropy algorithm
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/7fb8cdc41adf4b69bdf59c46a54154ca
work_keys_str_mv	AT xinglongliu improvingcontrastaccuracyandresolutionoflaserspecklecontrastimagingusingtwodimensionalentropyalgorithm AT huiyang improvingcontrastaccuracyandresolutionoflaserspecklecontrastimagingusingtwodimensionalentropyalgorithm AT ranli improvingcontrastaccuracyandresolutionoflaserspecklecontrastimagingusingtwodimensionalentropyalgorithm
_version_	1718425232676487168

Improving Contrast Accuracy and Resolution of Laser Speckle Contrast Imaging Using Two-Dimensional Entropy Algorithm

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