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 24 for “"surface representation"”.
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Digital surface representation and the constructibility of Gehry's architecture
… and construction. This agenda for digital representation of both formal and operational intentions, in the context of an ongoing exploration of challenging geometries, has provided new roles for computation in architectural practice. The work described in this thesis focuses on the digital …
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Processing of Underlying and Surface Phonological Representations In Visual Word Recognition
… selected for the study was the underlying and surface representations of word-final two-consonant codas. The underlying representation consisted of both consonants whereas the surface representation had the final consonant dropped. A set of three phonological lexical decision tasks were …
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Scalable Methods for Processing Massive Geometric Meshes
Polygonal meshes are easily the most common surface representation currently employed in computer graphics, finding application in fields as diverse as the visual arts and scientific computation. Technological advances in the areas of three-dimensional scanning, digital storage, and computer …
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Intersection and filleting of non-uniform B-spline surfaces
… In particular, the conversion of ACSYNT Hermite surface data of aircraft models to the non-uniform hi-cubic B-Spline surface representation is addressed. The topics discussed in this thesis include the design and development of an interactive graphics user interface, the design and coding of an …
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An Object-oriented design for hierarchical B-spline surfaces
… software system that supports free-form surface modelling based on the hierarchical overlay methodology of [Forsey88]. This work is motivated by the need to provide a space-efficient representation of tensor-product hierarchical spline surfaces, multiple offset method support, and general …
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Image-Based Reconstruction and Modeling of Geometry With Complex Reflectance in Non-Diffusive Media
… aims to model small-scale geometry of volumetric surface materials with complex reflectance. Instead of recovering the intricate geometry itself, it uses an appearance-based approach of volumetric texturing, which is a popular technique for rendering rich 3-D detail when a polygonal surface …
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A meshless, high-order integral equation method for smooth surfaces, with application to biomolecular electrostatics
… require a large number of panels to discretize a surface. To this end, a novel approach to discretize singular integral equations is proposed. Unlike the traditional boundary element method using panel discretization, the new method is meshless and capable of achieving spectral convergence: …
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Designing aesthetically pleasing freeform surfaces in a computer environment
… be employed in the aesthetic design of freeform surfaces, these tools must better reflect the ways in which creative designers conceive of and develop such shapes. In this thesis, I studied the design of aesthetically constrained freeform surfaces in architecture and industrial design, formulated …
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Techniques for Stochastic Implicit Surface Modelling and Rendering
Implicit surfaces are a powerful shape primitive for computer graphics. This thesis focuses on a shape modelling approach which generates synthetic shapes by the specification of an implicit surface generating function that has random properties. This type of graphic object can be called a …
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Medium Resolution
… 3D scanning techniques to produce digital representations of materials. By the nature of their discrete sampling, however, these representations vary in their precision. What the architect encounters in the 3D modeling software is not the material itself in its infinite specificities, with …
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Optimal Geometric Trimming of B-spline Surfaces for Aircraft Design
B-spline surfaces have been widely used in aircraft design to represent different types of components in a uniform format. Unlike the visual trimming of B-spline surfaces, which hides unwanted portions in rendering, the geometric trimming approach provides a mathematically clean representation. …
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A Problem Model for Decision Support Systems
… model for constructing and manipulating a representation of the definition of the problem as they understand it. The approach adopted herein is to first develop a problem definition model for ill-defined problems— the 6-Component problem definition model. With this model, it is then …
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A Problem Model for Decision Support Systems
… model for constructing and manipulating a representation of the definition of the problem as they understand it. The approach adopted herein is to first develop a problem definition model for ill-defined problems— the 6-Component problem definition model. With this model, it is then …
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2D and 3D surface image processing algorithms and their applications
… to obtain a complete 3D model. One single surface representation can better fit to the data. It may be further simplified for rendering, storing and transmitting efficiently, or the representation can be converted to some other formats. This work proposes an efficient algorithm for solving …
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Subdivision and manifold techniques for isogeometric design and analysis of surfaces
Design of surfaces and analysis of partial differential equations defined on them are of great importance in engineering applications, e.g., structural engineering, automotive and aerospace. This thesis focuses on isogeometric design and analysis of surfaces, which aims to integrate engineering …
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A Galerkin Approach to Define Measured Terrain Surfaces with Analytic Basis Vectors to Produce a Compact Representation
… In this dissertation, non-deformable terrain surfaces are defined as a sequence of vectors, where each vector comprises terrain heights at locations oriented perpendicular to the direction of travel. The evolution and implications of terrain surface measurement techniques and existing methods …
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Swedish Word Accents
… anden 'the spirit', Bailey gives the following surface representation for H dialects:(UNFORMATTED TABLE OR EQUATION FOLLOWS)$$\vbox{\halign{#\hfil&&\quad#\hfil\cr&H L&1&\quad H L& 2\cr&\enspace -{\sc{DP}}&&+{\sc{DP}}\cr&$\mid\ /$&&$\quad \mid\enspace\mid$\cr&anden&`the duck'&\quad anden&`the …
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Three-dimensional numerical analysis of reflective cracks in airfield pavements
… and propagates through its thickness and the surface. It can reduce the life expectancy of the overlay because it leads to roughness, raveling, and moisture infiltration. The analysis of reflective cracking involves all modes of fracturing i.e., Mode I (opening), Mode II (shearing), and Mode …
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Diffeomorphic image registration with applications to deformation modelling between multiple data sets
… measurements parameterised using the implicit surface representation, and recognising facial expressions where the stationary velocity fields are used as the facial expression descriptors. Both applications have been extensively evaluated based on the real representative data sets of …
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Parallel fluid dynamics for the film and animation industries
… LBM in conjunction with a Volume of Fluid (VOF) surface representation in a parallel environment with the aim of producing large scale scenes for the film and animation industries. The VOF method tracks mass exchange between cells of the LBM. In particular, we implement the new dynamic load …
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