Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 74 for “"multi-spectral"”.
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Multi-spectral Deep Tissue Quantitative Photoacoustic Imaging
… chromophores. Using oxy- and deoxy-hemoglobin, multi-spectral PAT can image vasculature structure, and provide functional information. Most of the current PAT imaging studies face four challenges: heterogeneous fluence distribution in the field of view, shallow penetration depth with external …
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Development of MiST-IR : multi-spectral infrared thermography
… heat transfer phenomena. The technique, called Multi-Spectral Infrared Thermography or MiST, builds on previous diagnostic techniques for measuring the 2-D wall temperature distribution or the 2-D phase distribution of the fluid above the surface. These methods make use of infrared thermography, …
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Hyper-Spectral Sensor Calibration Extrapolated from Multi-Spectral Measurements
Hyper-spectral (HS) sensors are the instruments of choice for remote sensing applications involving environmental monitoring, littoral survey, and military assessment. Accurate band-to-band sensor radiometric calibration is critical for successful data mining of such HS spectral sets. Current …
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Multi-spectral light interaction modeling and imaging of skin lesions
… Optimal selection of wavelengths for multi-spectral imaging requires light-tissue interaction modeling. For this, three-dimensional wavelength dependent voxel-based models of skin lesions with different depths are proposed. A Monte Carlo simulation algorithm (MCSVL) is developed in …
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A bio-inspired underwater multi-spectral and polarization imaging system
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Multi-spectral System for Autonomous Robotic Location of Fires Indoors
… this is location of a fire inside a structure. A multi-spectral sensor platform and fire location algorithm was developed in this research to locate a fire indoors autonomously. The multi-spectral sensor platform used a long wavelength infrared (LWIR) camera and ultraviolet (UV) sensor. The LWIR …
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Multi-scale and multi-spectral shape analysis: from 2d to 3d
… in this dissertation, in order to find the multiscale processing for the 3D shape, we start with shape vector image diffusion framework using the geometric mapping. Subsequently, we investigate the shape spectrum field by introducing the implementation and application of Laplacian shape …
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Transport Properties of Divertor Edge Plasmas Measured with Multi-Spectral Imaging
… and inflexible spatial coverage. In this thesis, multi-spectral imaging of helium line ratios (HeMSI) was used to create 2D poloidal maps of Tₑ and nₑ in the TCV divertor. These are the first plasma boundary measurements to provide continuous 2D coverage of Tₑ and nₑ for arbitrary magnetic …
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Multi Spectral Data Analysis for Diagnostic Enhancement of Pediatric Spinal Cord Injury
… and treatment planning. Hence in this work new multispectral magnetic resonance (MR) image based approaches were developed for high-throughput extraction of quantitative features from pediatric spinal cord MR images and subsequent analysis using decision support algorithms. This may potentially …
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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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Bio-Inspired Multi-Spectral Imaging Sensors and Algorithms for Image Guided Surgery
… PDE, Fluobeam, and others. These systems capture multi-spectral images using complex optical equipment and are combined with real-time image processing to present an augmented view to the surgeon. The information is presented on a standard monitor above the operating bed, which requires the …
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Utilization and Configuration of a Multi-Spectral Image Sensor for Turfgrass Data Collection
… tool to meet these needs. One type of sensor, spectral reflectance sensors, measures reflected light from turfgrass leaves. The primary hypothesis of this research is that image sensors can be used as a viable data collection tool for physical and chemical turfgrass data and that image sensors …
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Real-Time Nitrogen Detection System of Corn Crop Using a Multi -Spectral Imaging Sensor
Real-time N-deficiency was estimated by using NDVI and mapped relative to unstressed healthy plants. The MSIS system provided a measure of crop response that correlated with plant SPAD measurements (-0.93 for G channel and -0.88 for R channel). The system had smaller measurement variation than the …
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Radiometric validation of multi-spectral ocean colour satellite data in high biomass Southern Benguela waters
This study forms the first step towards a comprehensive ocean colour satellite validation strategy for the Southern Benguela region, and underlines the value of a statistical radiometric validation as a prerequisite to any geophysical validation exercise. A radiometric validation exercise was …
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Methods for multi-spectral image fusion: identifying stable and repeatable information across the visible and infrared spectra
… of methods that enable us to map and overlay multi-spectral information; the goal is to establish a combined image in which each pixel contains both colour and thermal information. Pixel-level fusion of these distinct modalities is approached using computational stereo methods; the focus is on …
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Remote sensing analyses for open pit mine area computation. A comparative study on the implementation of multi-spectral classifications and crowdsourcing to compute the spatial extent of four open-pit mines in Indonesia, Australia, Canada and Brazil
… them index-based, pixel-based and object-based multi-spectral classifications on single- and multi-source level, as well as crowdsourcing. Data sets comprise freely available Sentinel-2 optical imagery, Aster GDEM V2 elevation model and Sentinel-1 synthetic aperture radar imagery. Four copper or …
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Micro cameras as adjunct tools in biomedical applications
… at the tip of various devices, along with multi-spectral fibre illumination, automated readout, control, and image processing; into a compact format suitable for clinical use. The technology is then applied to a number of applications, with the system tailored to the specific use cases. The …
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