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Showing 1 to 20 of 289 for “"laser scanning"”.
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How Does Vegetation Movement During Laser Scanning Affect Common Point Cloud-Derived Metrics? A Virtual Laser Scanning Study
Close-range, high-resolution laser scanning is used in ecology, forestry and precision agriculture to assess plant health, structure, and productivity, and to monitor growth or regular movement patterns. A common problem in these applications is the wind-induced movement of vegetation during the …
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Intelligent laser scanning for computer aided manufacture.
… in reverse engineering. Optical triangulation laser sensors are one of the most popular and common non-contact methods used in the data acquisition process today. They provide the means for high resolution scanning of complex objects. Multiple scans of the object are usually required to capture …
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Laser scanning aggregates for real-time property identification
… Chemical composition testing is performed via Laser-Induced Breakdown Spectroscopy (LIBS), which involves firing a laser pulse at a sample and predicting its composition based on the spectrum of light emitted by the resulting plasma. Predictive models are generated via Partial Least Squares …
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Laser Scanning Imaging for Increased Depth-Of-Focus
… like optical sectioning microscopy and scanning confocal microscopy have innate problems. By simply modifying the pupil function in microscope imaging system, we can also extend the depth-of-focus. The scanning system with a thin annular pupil has a high depth-of-focus and can scan the …
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Road Features Extraction Using Terrestrial Mobile Laser Scanning System
… surveying approaches to terrestrial mobile laser scanning technologies. Our first contribution to this field is an automated road edge extraction algorithm which can be applied to LiDAR data and navigation information acquired by mobile survey vehicles. This novel algorithm relies on the …
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Terrestrial Laser Scanning for Quantifying Uncertainty in Fluvial Applications
… or remote sensing technologies, such as aerial laser scanning (ALS), which have limitations in spatial resolution. Terrestrial laser scanning (TLS) can potentially offer improvements over other surveying methods by providing greater resolution and accuracy. The first two objectives were to …
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Monitoring Underground Mine Displacement Using Photogrammetry and Laser Scanning
Photogrammetry and laser scanning are remote sensing technologies with the potential to monitor movements of rock masses and their support systems in underground mine environments. Displacements underground are traditionally measured through point measurement devices, such as extensometers. These …
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Confocal laser scanning microscopy of nanoparticles applied to immunosorbent assays
The aim of this project was to demonstrate and develop a confocal readout method for fluorescent immunosorbent assays and investigate its potential advantages in comparison to traditional immunoassays. The key point of a confocal immunosorbent assay is the ability to detect the thin layer of …
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Three-Dimensional Microscopy by Laser Scanning and Multi-Wavelength Digital Holography
… image formation that employs a raster-scanning laser beam focused on a sample, while non-imaging detector receives the scattered light is presented. The images produced by this method are analogous to the scanning electron microscopy with visible effects of shadowing and reflection. …
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Microelectromechanical handheld laser-scanning confocal microscope: application to breast cancer imaging
… investigates handheld instrumentation for laser-scanning confocal microscopy (LSCM) and its applicability to breast cancer detection and subsequent image-guided management. LSCM allows high-resolution mapping of spatial variations in refractive index or tumor marker expression within a …
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Estimated Distributed Near-Field Surface Displacements Using Nascent Mobile Laser Scanning
… field. To fill this void, we introduce a mobile laser scanning (MLS)-based change detection framework that is capable of detecting distributed fault displacements in the near field with high resolution and accuracy. The approach leverages MLS’s redundant point cloud representation of an object’s …
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Konzeption und Entwicklung eines adaptiv-optisch korrigierten Laser-Scanning Retina-Tomographen
… von Krankheiten des Augenhintergrundes ist die Laser-Scanning-Ophtalmologie ein wertvolles bildgebendes Verfahren, dessen Auflösung aber durch die Aberrationen des Auges begrenzt wird. In dieser Arbeit werden Untersuchungen zum Einsatz eines adaptiv-optischen Systems, bestehend aus einem …
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Use of Graded Laser Scanning to Generate Efficient Boundary Element Meshes
… at different resolutions using a (non-contact) laser scanner measurement to obtain the point clouds. Meshes of each object were generated in Rapidform and directly used in a boundary element stress analysis. In addition, the steam turbine blade was scanned using different scanning resolutions. …
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Three-Dimensional Volume Reconstruction From Fluorescent Confocal Laser Scanning Microscopy Imagery
The broader impact of my work is in providing the algorithms in a form of web-enabled tools to the medical community so that medical researchers can minimize laborious and time intensive 3D volume reconstructions using the tools and computational resources at NCSA.
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Combined use of airborne laser scanning and hyperspectral imaging for forest inventories
… species, etc..) from the combination of Airborne Laser Scanning (ALS) and Hyperspectal Imaging (HI). The research is centered around three main topics: the development of new individual tree segmentation algorithms, the assessment of direct and indirect dendrometry methods, tree species …
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Motionless wide angle laser scanning for object detection and multi-spectral discrimination
Terrestrial laser screening has become an essential tool in may industries requiring digital three-dimensional reconstruction of an object or scene. These include civilian applications such as surveying, automobile collision avoidance, 3D animation modelling, mobile robot navigation, industrial …
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Adaptive Processing of Laser Scanning Data and Texturing of the Segmentation Outcome
Over the past few years, laser scanning systems (airborne, static terrestrial, and mobile terrestrial systems) have been acknowledged as the leading tools for the collection of high density 3D point clouds over physical surfaces for many different applications (3D city modelling, transportation …
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