Results 31 to 40 of about 32,925 (280)
Normalized ghost imaging [PDF]
, 2012 We present an experimental comparison between different iterative ghost imaging algorithms. Our experimental setup utilizes a spatial light modulator for generating known random light fields to illuminate a partially-transmissive object.
Baoqing Sun +15 more
core +3 more sources
A new simulation method for laser speckle imaging to investigate hemodynamics [PDF]
E3S Web of Conferences, 2019 Speckle simulation is a powerful protocol to investigate the properties of speckle and evaluate image processing method. However, only static speckle images can be simulated by available methods without considering time-integrated effect of CCD.
Sang X, Li D, Chen B
doaj +1 more source
Laser speckle contrast imaging compared with indocyanine green in renal perfusion of a porcine model
Current Urology, 2023 . Background. When viewed under near-infrared light, indocyanine green (ICG) signal for kidney perfusion can be utilized in partial nephrectomy. Laser speckle contrast imaging (LSCI) uses coherent light to detect perfusion during real-time laparoscopic ...
Jonathan Noël +10 more
doaj +1 more source
Comparison of laser speckle contrast imaging with laser Doppler for assessing microvascular function [PDF]
, 2011 Objective: To compare the inter-day reproducibility of post-occlusive reactive hyperaemia (PORH) and sympathetic vasomotor reflexes assessed by single-point laser Doppler flowmetry (SP-LDF), integrating-probe LDF (IP-LDF) and laser speckle contrast ...
Briers, J. David +4 more
core +1 more source
IEEE Photonics Journal, 2022 The existing approach for evaluating the statistical characteristics of speckle intensity distribution is applicable only to completely decorrelated laser beams.
Qiyong Xu +7 more
doaj +1 more source
Monitoring spatially heterogeneous dynamics in a drying colloidal thin film [PDF]
, 2010 We report on a new type of experiment that enables us to monitor spatially and temporally heterogeneous dynamic properties in complex fluids. Our approach is based on the analysis of near-field speckles produced by light diffusely reflected from the ...
Berne B.J. +8 more
core +2 more sources
Dynamic Laser Speckle Imaging [PDF]
, 2019 ABSTRACTUtilizing a high-speed camera and recording back-scattered laser light at more than 20,000 frames per second, we introduce the first wide-field dynamic laser speckle imaging (DLSI) in which we are able to quantify the laser speckleintensity temporal auto-correlation function g2(τ) for every pixel individually to obtain a quantitative image of ...
Postnov, Dmitry D. +4 more
openaire +1 more source
Underwater environment laser ghost imaging based on Walsh speckle patterns
Frontiers in Physics, 2023 Underwater imaging is a challenging task because of the effects of scattering and absorption in water. Ghost imaging (GI) has attracted increasing attention because of its simple structure, long range, and achievability under weak light intensity.
Mochou Yang, Yi Wu, Guoying Feng
doaj +1 more source
Twente Optical Perfusion Camera: system overview and performance for video rate laser Doppler perfusion imaging [PDF]
, 2009 We present the Twente Optical Perfusion Camera (TOPCam), a novel laser Doppler Perfusion Imager based on CMOS technology. The tissue under investigation is illuminated and the resulting dynamic speckle pattern is recorded with a high speed CMOS camera ...
Draijer, Matthijs +3 more
core +4 more sources
Coherent imaging of a pure phase object with classical incoherent light [PDF]
, 2006 By using the ghost imaging technique, we experimentally demonstrate the reconstruction of the diffraction pattern of a {\em pure phase} object by using the classical correlation of incoherent thermal light split on a beam splitter. The results once again
A. Gatti +15 more
core +4 more sources