Results 41 to 50 of about 3,110,122 (363)
Laser Speckle Contrast Imaging Based on a Mobile Phone Camera
IEEE Access, 2021 Laser speckle contrast imaging (LSCI) technology, a type of blood flow monitoring technology, has broad application prospects and has become an attractive subject of research.
Ping Kong +4 more
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High-Resolution Scanning Coded-Mask-Based X-ray Multi-Contrast Imaging and Tomography
Journal of Imaging, 2021 Near-field X-ray speckle tracking has been used in phase-contrast imaging and tomography as an emerging technique, providing higher contrast images than traditional absorption radiography.
Zhi Qiao +3 more
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Semi‐supervised classification of fundus images combined with CNN and GCN
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose Diabetic retinopathy (DR) is one of the most serious complications of diabetes, which is a kind of fundus lesion with specific changes. Early diagnosis of DR can effectively reduce the visual damage caused by DR. Due to the variety and different morphology of DR lesions, automatic classification of fundus images in mass screening can ...
Sixu Duan +8 more
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Line Scan Spatial Speckle Contrast Imaging and Its Application in Blood Flow Imaging
Applied Sciences, 2021 Laser speckle imaging has been an indispensable tool for visualizing blood flow in biomedical applications. We proposed a novel design of the laser speckle imaging system, which combines confocal illumination and detection with various speckle analysis ...
E Du +3 more
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Scientific Reports, 2021 The artefact known as speckle can plague numerous imaging applications where the narrow linewidth of laser light is required, which includes laser projection and medical imaging.
David J. Hansford +3 more
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Photonics, 2021 Speckle-free imaging using a multimode fiber has been widely used for imaging systems. Generally, previous work has assumed that all the propagating modes of the fiber are uniformly excited, but the modal power distribution is actually affected by ...
Jun Zhou +8 more
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Time varied illumination laser speckle contrast imaging.
Optics Letters, 2021 Laser speckle contrast imaging is a technique to determine blood flow rate with a limitation of low dynamic range. In this Letter, we introduce a varied illumination speckle contrast imaging method.
M. Siket +4 more
semanticscholar +1 more source
Effect of Phase Relations on Speckle Pattern: Simulation and Measurement
IEEE Photonics Journal, 2019 Speckle is an important phenomenon in various applications. It can be quantified by speckle contrast. However, at present, the influence of the phase relations among the various wavelengths on speckle contrast is rarely analyzed theoretically.
Linlu He +5 more
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Enhancement of microvessel in laser speckle image using gaussian kernel template [PDF]
Journal of Innovative Optical Health Sciences, 2019 Laser speckle contrast imaging (LSCI) is an optical imaging method, which can monitor microvascular flow variation directly without addition of any ectogenous dye.
Yameng Zhang +4 more
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Statistics of local speckle contrast
Journal of the Optical Society of America A, 2007 In describing the first-order properties of laser speckle under polarized illumination conditions, it is almost an article of faith that the contrast is unity. In many processing schemes, however, the contrast defined as the quotient of the standard deviation and the mean is calculated over a localized spatial region. In such cases, this local contrast
Duncan, Donald D. +2 more
openaire +4 more sources