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Title: Computation and applications of distance fields in volume graphics
Author: Satherley, R. A.
Awarding Body: University of Wales Swansea
Current Institution: Swansea University
Date of Award: 2000
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The original aim of this work was to extend Perlin and Hoffert's hypertexture, so that any complex object can rendered with effects such as fire and fur. It was found that hypertexture effects can be applied to volume datasets whose voxels give the shortest distance to the surface of the object it contains. This type of dataset is commonly referred to as a distance field. Therefore, the main aim of this work became the development of methods for computing accurate distance fields. The main contribution of this work is the development of the new, more accurate, vector-city vector distance transform and two new methods for computing sub-voxel accurate distance fields. In addition, a review of existing methods for computing a distance field has been given. Methods for reducing and correcting errors in a distance field have been discussed. Finally, methods for adding surface detail and texture to a rendered object have been described and it has been shown that hypertexture effects can be applied to a distance field. Selected work from this thesis has been presented at the 1st International Workshop on Volume Graphics (VG 99), Swansea, UK, 1999, Vision, Modeling and Visualization (VMV 2000), Saarbr├╝cken, Germany, 2000, the 9th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision (WSCG 2001), Plzen, Czech Republic, 2001, the 19th Annual Conference of Eurographics (UK Chapter) (EGUK 2001), London, UK, 2001, the International Conference on Shape Modelling and Applications (SMI 2001), Genova, Italy, 2001, the 2nd International Workshop on Volume Graphics (VG 01), Stony Brook, New York, USA, 2001 and Computer Graphics International 2001 (CGI 2001), Hong Kong, 2001. Parts of this thesis have also appeared in Computer Vision and Image Understanding, 2001 and will appear in The Visual Computer.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available