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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Computer graphics in engineering applications /

Lo, Sai-huen. January 1982 (has links)
Thesis--M. Phil., University of Hong Kong, 1983.

A novel shape representation on GPU for real-time rendering

Chan, Bin, 陳斌 January 2006 (has links)
published_or_final_version / Computer Science / Doctoral / Doctor of Philosophy

Multiphase implicit modeling and variational blue noise sampling

Yuan, Zhan January 2013 (has links)
This thesis investigates two fundamental problems in computer graphics including object modeling and sampling. In object modeling problems, implicit function is widely used. It has a wide range of applications in entertainment, engineering and medical imaging. A standard two-phase implicit function only represents the interior and exterior of a single object. To facilitate solid modeling of heterogeneous objects with multiple internal regions, object-space multiphase implicit functions are much desired. Multiphase implicit functions have much potential in modeling natural organisms, heterogeneous mechanical parts and anatomical atlases. In the first part of this thesis, we introduce a novel class of object-space multiphase implicit functions that are capable of accurately and compactly representing objects with multiple internal regions. Our proposed multiphase implicit functions facilitate true object-space geometric modeling of heterogeneous objects with non-manifold features. We present multiple methods to create object-space multiphase implicit functions from existing data, including meshes and segmented medical images. Our algorithms are inspired by machine learning algorithms for training multicategory max-margin classifiers. Comparisons demonstrate that our method achieves an error rate one order of magnitude smaller than alternative techniques. In the second part of this thesis we study another important problem, sampling, which is a core process for numerous graphics applications including rendering, non-photorealistic image stippling, imaging, and geometry processing. Among all the existing sampling algorithms, blue noise point sampling is especially popular because it can generate spatial uniform point distribution with no aliasing artifacts. We present a new and versatile variational framework for generating point distributions with high-quality blue noise characteristics while precisely adapting to given density functions. Different from previous approaches based on discrete settings of capacity-constrained Voronoi tessellation, we cast the blue noise sampling generation as a variational problem with continuous settings. Based on an accurate evaluation of the gradient of an energy function, an efficient optimization is developed which delivers significantly faster performance than the previous optimization-based methods. Our framework can easily be extended to generating blue noise point samples on manifold surfaces and for multi-class sampling. The optimization formulation also allows us to naturally deal with dynamic domains, such as deformable surfaces, and to yield blue noise samplings with temporal coherence. We present experimental results to validate the efficacy of our variational framework. A core step in our blue noise sampling algorithm is to compute the Voronoi diagram. This is a fundamental geometry structure which has numerous applications including computer animation, pattern recognition and so on. Efficient computation of Voronoi diagram is critical for improving the performance of these applications. Thus, we also study the problem of using the GPU to compute the generalized Voronoi diagram (GVD) for higher-order sites, such as line segments and curves. We propose an algorithm that can compute considerately more accurate GVD with much less memory than using the existing algorithms, with only moderate increase of the running time. / published_or_final_version / Computer Science / Doctoral / Doctor of Philosophy

Computer graphics in engineering applications

Lo, Sai-huen., 羅世煊 January 1982 (has links)
published_or_final_version / Civil Engineering / Master / Master of Philosophy

Metamorphosis of polyhedral models using intrinsic shape parameters

孫宇萬, Sun, Yue-man. January 1995 (has links)
published_or_final_version / Computer Science / Master / Master of Philosophy

Interactive FORTRAN graphics plotting routines for the Digital Equipment Corporation GT-44 system

Holsclaw, Lynden Edward, 1951- January 1977 (has links)
No description available.

A general purpose graphics system for a small computer.

McNeil, Timothy O'Brien. January 1973 (has links)
No description available.

Data entry methods for an urban graphics database

Joobbani, Rostam January 1977 (has links)
No description available.

A class of perfect graphs /

Hoang, Trong Chinh. January 1983 (has links)
No description available.

The design and construction of a disc oriented graphics system.

Fabi, Ronald James. January 1971 (has links)
No description available.

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