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Noise in laser speckle correlation and imaging techniques
Optics Express, 2010 We study the noise of the intensity variance and of the intensity correlation and structure functions measured in light scattering from a random medium in the case when these quantities are obtained by averaging over a finite number N of pixels of a digital camera.
Sergey Skipetrov +2 more
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Clinical applications of laser speckle contrast imaging: a review [PDF]
Journal of Biomedical Optics, 2019 When a biological tissue is illuminated with coherent light, an interference pattern will be formed at the detector, the so-called speckle pattern. Laser speckle contrast imaging (LSCI) is a technique based on the dynamic change in this backscattered light as a result of interaction with red blood cells. It can be used to visualize perfusion in various
E Christiaan Boerma +2 more
exaly +5 more sources
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Laser Speckle Stereo System in Biomedical Imaging
2020 43rd International Convention on Information, Communication and Electronic Technology (MIPRO), 2020Speckle is an optical interference phenomenon generated by the reflection of a highly coherent beam of light (e.g., laser) on a rough surface. This phenomenon has been applied in several research areas, aiming at the characterization of static surfaces or the extraction of properties in dynamic processes.
F. Salgueiro +2 more
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A Miniaturized Platform for Laser Speckle Contrast Imaging
IEEE Transactions on Biomedical Circuits and Systems, 2012Imaging the brain in animal models enables scientists to unravel new biological insights. Despite critical advancements in recent years, most laboratory imaging techniques comprise of bulky bench top apparatus that require the imaged animals to be anesthetized and immobilized.
Janaka Senarathna +3 more
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Efficient Processing of Laser Speckle Contrast Images
IEEE Transactions on Medical Imaging, 2008Though laser speckle contrast imaging enables the measurement of scattering particle dynamics with high temporal resolution, the subsequent processing has previously been much slower. In prior studies, generating a laser speckle contrast image required about 1 s to process a raw image potentially collected in 10 ms or less.
W. James Tom +2 more
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Laser speckle imaging of blood flow in microcirculation
Physics in Medicine and Biology, 2004Monitoring the spatio-temporal characteristics of microcirculation is crucial for studying the functional activities of biotissue and the mechanism of disease. However, conventional methods used to measure blood flow suffer from limited spatial resolution or the injection of exogenous substances or the need of scanning to obtain the dynamic of regional
Haiying, Cheng +5 more
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Calibration in laser speckle contrast imaging
Biomedical Optics, 2006We provided a novel calibration procedure in laser speckle contrast imaging that can efficiently compensate systematic errors in speckle contrast caused by speckle/pixel size mismatch and static scatters in the tissue.
Shuai Yuan +2 more
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Image recognition in the presence of laser speckle
Journal of the Optical Society of America A, 1986Two techniques for performing digital image recognition on speckled images are presented. The speckle is treated as a source of randomness that is used to perform Monte Carlo calculations of the correlation between an input scene and a reference scene.
Joseph Marron, G. Michael Morris
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Impact of Averaged Image Speckle Size on Laser Speckle Imaging
Acta Optica Sinica, 2009邱建军 Qiu Jianjun +4 more
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