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 10 of 10 for “"3D measurements"”.
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Comparing a Two-Dimensional and Three-Dimensional Assessment of Unilateral Alveolar Cleft Repairs: A Pilot Project
… of a two-dimensional (2D) and three-dimensional (3D) analysis of unilateral alveolar cleft repairs with regards to the percentage of bone fill and an associated bone fill score. Ten sets of pre-operative and post-operative computed tomography (CT) scans were used to determine the defect volume and …
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3D Scintillator Detector Quenching Characterization For Scanning Proton Beams
… poses challenges for quality assurance measurements leading to sophisticated detector setups and time consuming measurements. Fast 3D measurements are therefore desirable to verify the complex dose distribution and to enable the utilization of the full potential of proton therapy. The …
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The turbulent structure of the jet in cross-flow
… Stereoscopic Particle Image Velocimetry measurements to reveal the mean and instantaneous three-dimensional (3D) structures. All of the measurements were performed in the Counter-rotating Vortex Pair (CVP) plane for a high velocity ratio and jet Reynolds number. Statistical measurements …
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Image-based 3D metrology of non-collaborative surfaces
Image-based 3D reconstruction has been employed in industrial metrology for micro measurements and quality control purposes. However, generating a highly-detailed and reliable 3D reconstruction of non-collaborative surfaces (textureless, shiny, and transparent) is still an open issue. This thesis …
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Geophysical and geochemical constraints on submarine volcanic processes
… Based on synthetic vesicle populations, 2D and 3D measurements, and Raman spectroscopy, I show that traditional methods overestimate MORB CO2 concentrations by as much as 50%, which has important implications for estimating ridge CO2 flux. In Chapter 3, I apply methods from Chapter 2, along with …
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Accuracy of Ortho Insight 3D Digital Scanner in Mesial-Distal Tooth Measurements
… scanners, accuracy of mesial-distal tooth measurements using the Ortho Insight 3D scanner and its software (Motionview Software LLC) has not been reported. Purpose: The objective of this study was to determine if the MD tooth measurements from the digital models scanned by Ortho Insight 3D …
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Developing an accurate close-range photogrammetric technique for extracting 3D information from spherical panoramic images
… Panoramas have widely been used to texture 3D models generated from laser scanning, for creating virtual reality tour applications, documenting landscape and cultural heritage sites, advertising real estates and recording crime scenes. The goal of this research was to develop an accurate …
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Perception Systems for Autonomous Forest Machinery
… which provides approximately equal-density 3D measurements in all directions. Furthermore, a machine vision camera is used for detecting young trees among other vegetation, and sensor fusion of an actuated lidar and machine vision camera is utilized for detection and classification of tree …
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Deriving high resolution 3D information using multibaseline airborne SAR interferometry
… that can be used to generate topography measurements such as digital elevation models (DEMs). The measurements are characterized by properties that highly depend on the system parameters. These properties include backscatter characteristics, penetration into vegetation, spatial …
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Influence of Biomaterials in Alveolar Bone Regeneration and Preservation
Dental implants are nowadays a reliable solution to replace missing teeth and have been widely documented. However, they require a minimal bone quantity (in height and thickness). But alveolar bone defects are very frequent, for instance due to periodontitis, traumatism or acute dental infection. …