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 61 for “"three-dimensional imaging"”.
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Three dimensional imaging of translucent objects using volume holographic techniques
… reveals a wealth of information about the sea. Three dimensional in-situ images of these semi-translucent organisms are therefore of great interest. To better understand how volume holographic imaging works on a translucent object like plankton, this project explores the three dimensional …
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Three dimensional imaging of multiphase flows : from bubbles to sneezes
… detection and measurement requires advanced three-dimensional (3D) imaging techniques. In this thesis, 3D computational photographic methods including light field imaging (LFI) and synthetic aperture (SA) refocusing are combined and extended to resolve multiphase flows in 3D over time. …
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Three-Dimensional Imaging using a Novel Rotating Point Spread Function Imager
<p>The capability to achieve three-dimensional (3D) imaging in a single snapshot is a highly coveted goal for the imaging community. To be able to extend the depth-of-field while simultaneously encoding depth in the point spread function (PSF) itself allows an imaging solution which is less time …
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Three Dimensional Imaging of Helicon Wave Fields via Magnetic Induction Probes
The new diagnostic methods developed in this work (both probe characterization and analysis of measured data) provide fundamental insight into laboratory helicon plasma. The methods and results derived here will supplement and aid the design of future helicon plasma sources.
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A large-scale three-dimensional imaging system based on laser speckle
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Preliminary work for three-dimensional imaging of the epoch of reionization with interferometers
… via both the power spectrum and direct imaging [4]. In order to get three-dimensional images from calibrated inteferometer data, we develop a mapping algorithm called Direct Inversion Matrix (DIM) (151, [6]) that has many advantages over other existing algorithms. However, DIM tends to …
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Analysis of multiphase fluid flows via high speed and synthetic aperture three dimensional imaging
… flow is studied using traditional high-speed imaging in what is known as the bag breakup regime, in which partial bubbles that look like bags are formed along the downstream side of the liquid jet due to the aerodynamic drag exerted on it by the cross flow. Here, a new instability is …
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Design and implementation of a high-speed solid-state acousto-optic interference pattern projector for three-dimensional imaging
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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VALIDATION OF LOW-COST MOBILE PHONE APPLICATIONS FOR THREE-DIMENSIONAL FACIAL IMAGING: A COMPARISON WITH PROFESSIONAL THREE-DIMENSIONAL IMAGING SYSTEMS
… this thesis was to investigate the accuracies of three dimensional (3D) facial scanning mobile phone applications using infrared structured-light cameras (TrueDepth cameras) on the iPhone as compared to professional 3D facial imaging systems
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Three Dimensional Interferometric Imaging at Terahertz Frequency for Concealed Object Detection
… (NJIT) [1] [2] [3] working on interferometric imaging with a spiral array. Their investigation stopped at two dimensional imaging with a two dimensional array. In this thesis, their idea was developed further into the significantly more complex imaging with a three dimensional array. The …
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Atomic-scale and three-dimensional transmission electron microscopy of nanoparticle morphology
… electron tomographic methods for high-fidelity three-dimensional analysis. Going beyond preceding analyses, high-resolution annular dark-field imaging is used to verify successful nano-sizing of the intermetallic compound GaPd2. It also reveals catalytically significant and crystallographically …
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An Evaluation of 3D Building Modelling and Visualisation packages for Enhancing Public Participation within the Planning Process
This thesis will look at the importance of 3D Visualization within the planning process and addresses the issue of improving public participation within urban regeneration. The main aim of this research is therefore to discover what type of model the public require in terms of understanding future …
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Biophysical Applications of Single Molecule Fluorescence Localization
… based on objective-type TIR and wide field CCD imaging. We present several novel applications of single molecule localization to both proteomics and genomics, including a method for improving the resolving capacity by more than an order of magnitude (Single Molecule High Resolution Imaging with …
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Investigations of three-dimensional optical transfer functions
The performance of two-dimensional image processing systems has been well documented. In this thesis we study the performance of three-dimensional imaging systems. Such a study helps in understanding the fundamental restrictions of the propagation of three-dimensional (3-D) wavefields. The …
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3D imaging in forensic odontology
… are: conducting a review of the current 2D and three 3D capture methods, also a series of benchmarks for system assessment. Followed by a series of performance evaluations of the existing current 2D and two 3D methods. Further proposed solutions include, the design of a system specification for …
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The nature and remediation of spatial problems associated with interpreting diagrams of biological sections, vol.II The instructional packages
This recommended "time planner" has been included so that you have some idea of how much time you will need for each of the lessons. One of the aims of this package is to ensure that teachers do not have to deviate more than is necessary from their normal Std 8 lessons on the structure and function …
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An investigation into the design of an image reconstruction algorithm for continuous wave tomosynthesis
… theoretical advantages over traditional breast imaging techniques, like mammography. These theoretical advantages include improved spatial resolution, better information weighting, and the ability to resolve structures hidden by tissue overlap. However, unlike mammography, tomosynthesis is a …
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TECHNOLOGICAL BREAKTHROUGH TOWARDS THE USE OF A NOVEL VISUAL-INERTIAL ODOMETRY SYSTEM AS AN AID FOR THE DIGITALLY-GUIDED INTERVENTION
Recent data availability of three dimensional imaging brought new possibilities for the guided intervention. The management of complex data requires the use of new tools and new technologies. We analyzed the use of algorithms for the automatic, ai-driven segmentation to extrapolate the best systems …
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Structural and Physical Characterization of Insect Flow Systems
… if Murray's law applies to this system using three-dimensional imaging of tracheal tubes. Chapter 3 begins to characterize the physical properties of insect hemolymph, specifically the viscosity and density of hemolymph, using experimental measurements. Because insects are strongly affected by …
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