Results 231 to 240 of about 2,012,293 (294)

Quantum machine learning enhanced laser speckle analysis for precise speed prediction. [PDF]

Sci Rep
Chen Y, Han W, Bin G, Wu S, Morgan SP, Sun S.   +5 more
europepmc   +1 more source

Lightweight denoising speckle contrast image GAN for real-time denoising of laser speckle imaging of blood flow. [PDF]

Biomed Opt Express
Sang X, Cao R, Niu L, Chen B, Li D, Li Q.   +5 more
europepmc   +1 more source

Arterial-wall origin and transient dynamics of flow- and vaso-motion activities in the awake mouse brain revealed by laser speckle contrast imaging. [PDF]

Neurophotonics
Skøtt MV, Matchkov V, Postnov DD.
europepmc   +1 more source

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Laser speckles simulation for laser speckle contrast imaging

Optical Interactions with Tissue and Cells XXXVI
Pulse waveform signals extracted from LSCI (Laser Speckle Contrast Imaging) time series in biological tissue are used to gain information about the vital signs of a person e.g. heart rate and respiration.
Marion Barbeau, Nienke Kempers, Jac Romme, Evelien Hermeling   +3 more
openaire   +2 more sources

Quality assessment of laser speckle patterns for digital image correlation by a Multi-Factor Fusion Index

Optics and Lasers in Engineering, 2020
Digital image correlation based on laser speckle has its unique advantages in ultra-high temperature deformation measurement. The traditional quality assessment criteria of artificial speckle which consider only the contrast of the speckle pattern or the
Jianhong Yang, Fujia Liu
exaly   +2 more sources

Three-dimensional dimension of laser speckle

Applied Optics, 1992
It is well known that the three-dimensional dimension of laser speckle is a critical parameter in laser holographic interferometry, laser speckle photography, and holospeckle interferometry. In this paper a statistical analysis for computing the three-dimensional dimension of laser speckle is presented.
F P Chiang
exaly   +3 more sources

Influence of speckle on laser range finders

Applied Optics, 1991
Speckle noise is shown to constitute a fundamental limit to laser range finders based on triangulation. A model is derived that relates the magnitude of this noise to the optical geometry used. Synchronized laser scanners are shown to have inherent speckle noise reduction properties. Experimental results are presented.
Marc Rioux, M Rioux
exaly   +3 more sources

Advances in laser speckle imaging: From qualitative to quantitative hemodynamic assessment

Journal of Biophotonics, 2023
Laser speckle imaging (LSI) techniques have emerged as a promising method for visualizing functional blood vessels and tissue perfusion by analyzing the speckle patterns generated by coherent light interacting with living biological tissue.
Muhammad Mohsin Qureshi, Nader Allam, Jeon-Taek Im, Hyuk-Sang Kwon, Euiheon Chung, I. A. Vitkin   +5 more
semanticscholar   +1 more source

Carbon Dots with Blue‐to‐Near‐Infrared Lasing for Colorful Speckle‐Free Laser Imaging and Dynamical Holographic Display

Advances in Materials, 2023
As a new solution‐processable laser material, carbon dots (CDs) offer advantages of non‐toxicity, low‐cost, and high‐stability, which are conducive to the sustainable development of miniaturized lasers.
Yongqiang Zhang, Jinping Wang, Lu Wang, Rui Fu, Laizhi Sui, Haoqiang Song, Yongsheng Hu, Siyu Lu   +7 more
semanticscholar   +1 more source

Contouring by laser speckles

IEEE Journal of Quantum Electronics, 1981
A technique is presented to determine surface contours of 3-D objects by laser speckle interferometry. A double exposure specklegram is recorded by giving the object a small tilt between exposures. Surface contours are obtained by Fourier filtering of the specklegram.
G K, Jaisingh, F P, Chiang
openaire   +2 more sources