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 14 of 14 for “"shape modeling"”.
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Data-driven 3D shape modeling
3D shape modeling is essential for computer to understand our real world. So far, 3D shaping modeling is still an open issue. There are too much raw data around, but there is no uniform or standard way to translate them for computers. My work is an attempt to build a bridge from real world to …
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Statistical Shape Modeling to Quantify Variation in the Proximal Humeral Anatomy
… of this thesis was to develop a Statistical Shape Model (SSM) of the cortical and cancellous bone regions of the proximal humerus, and to assess potential shape differences with gender and ethnicity, with a goal of informing implant design. An SSM was used and Principal Component Analysis …
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Left ventricle motion and shape modeling, analysis, and visualization from image sequences
This thesis addresses the problems of modeling, analysis, and visualization of left ventricle motion and deformation based on two types of image sequences. The first type of image sequence used in this research is the coronary cineangiograms. The 3D coordinates of a set of bifurcation points …
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Assessing the Impact of Femur Morphological Variations on Pediatric Hip Joint Biomechanics Using Statistical Shape Modeling
… hip joint center estimation errors. A shape statistical model (SSM) of decedent infant femurs from the Ortolani collection was created using ShapeWorks, capturing key morphological features, such as variations in the femoral neck-shaft and anteversion angles. Seven synthetic femurs were …
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Late Complications in the Descending Aorta Following Valve-Sparing Root Replacement (VSRR) in Marfan Syndrome (MFS) Patients: A Computational Analysis
… dynamics (CFD) simulations alongside statistical shape modeling (SSM) to investigate the relationships between aortic geometry, hemodynamic indices, and post-surgical dissection risk. We retrospectively analyze CT imaging of a cohort of MFS patients who underwent root surgery, divided into a …
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Explicit Finite Element Modeling of Knee Mechanics During Simulated Dynamic Activities
… through a combined mesh morphing and statistical shape modeling approach. These studies included several novel methods for investigating knee mechanics under dynamic loading and specimen-specific soft tissue constraint using the explicit FE method that could be used to better reproduce the complex …
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Prediction of Root Form Using Crown Data: Mandibular Left First Premolar
… of this study was to determine if a statistical shape model (SSM) of the lower left first premolar, consisting of both crown and root data, could adequately describe the root form from a surface scan consisting of only crown data. Secondly, it tested if there were any angles or measurements on …
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Development of a new apparatus to measure flame spread through a free stratified fuel/air mixture: numerical modeling and experimental results
… flammability regions, stability limits, and the shape of a flame propagating through a free, layered fuel-air mixture, as opposed to flame spread though layered mixtures over a solid surface, which had been previously studied. A free layer eliminates contact between the flame and the floor, which …
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Bayesian Nonparametric Modeling and Theory for Complex Data
… methodological problems associated with Bayesian modeling of infinite dimensional `objects', popularly called nonparametric Bayes. The term `infinite dimensional object' can refer to a density, a conditional density, a regression surface or even a manifold. Although Bayesian density estimation as …
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Use Of Small Format Aerial Photography in NPS Pollution Control Applications
… series of analyses were converted into polygons (shape file) using ArcView GIS, which was then used to calculate the area and perimeter of each polygon. The parameters utilized to describe the shape of a poultry house included width, length, compactness, length-width ratio, and polygon centroid …
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Statistical Modeling to Investigate Anatomy and Function of the Knee
… dissertation is a demonstration of statistical modeling approaches to evaluate population variability in anatomy of the knee and function of its tibiofemoral (TF) and patellofemoral (PF) joints. Three-dimensional (3D) computational models of the bone and cartilage in the knee were characterized …
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3D face processing for animation and biometrics
… We also demonstrate the applications of 3D face modeling in avatar animation, expression recognition and eye gaze estimation. The algorithms contribute to a complete framework for image and video analysis and synthesis based on 3D face models. From the experiments on the self-collected and public …
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Forecasting Longitudinal Changes In Oropharyngeal Tumor Volume, Position, and Morphology During Image-Guided Radiation Therapy
… volume, one position, and two morphology (size, shape, and position) feature vectors were used to describe 35 oropharyngeal gross tumor volumes (GTVs) during radiation therapy. The two morphology feature vectors comprised the coordinates of the GTV centroids and one of two shape descriptors. One …