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Visar resultat 1 - 5 av 72 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Sparse Voxel DAGs

   Författare :Viktor Kämpe; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geometry; Shadows; Data structures; Tree; Visibility; Grid; Voxel; Directed acyclic graph; Computer graphics;

   Sammanfattning : This thesis investigates a memory-efficient representation of highly detailed geometry in 3D voxel grids. The memory consumption of a plain dense grid scales too fast as the resolution increases to be feasible at very high resolutions. LÄS MER

3. 2. Sparse Voxel DAGs for Shadows and for Geometry with Colors

   Författare :Dan Dolonius; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; directed acyclic graph; octree; compression; voxel; geometry; shadows; colors;

   Sammanfattning : Triangles are probably the most common format for shapes in computer graphics. Nevertheless, when high detail is desired, Sparse Voxel Octrees (SVO) and Sparse Voxel Directed Acyclic Graphs (DAG) can be considerably more memory efficient. One of the first practical use cases for DAGs was to use the structure to represent precomputed shadows. LÄS MER

4. 3. On sparse voxel DAGs and memory efficient compression of surface attributes for real-time scenarios

   Författare :Dan Dolonius; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; directed acyclic graph; surface properties; neural networks; voxel; compression; spherical gaussians; light field; octree; filtering; geometry;

   Sammanfattning : The general shape of a 3D object can expeditiously be represented as, e.g., triangles or voxels, while smaller-scale features usually are parameterized over the surface of the object. LÄS MER

5. 4. Exploiting Coherence in Voxelized Geometry

   Författare :Viktor Kämpe; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; time-varying; directed acyclic graph; geometry; voxel; octree;

   Sammanfattning : In computer graphics, the geometry of virtual worlds can be represented in numerousways, from collections of simple triangles or voxels to higher-order primitives likecurved surfaces. There is a trade-off, both in terms of memory consumption and processingtime, between the cost of an individual primitive and the number of primitivesrequired to faithfully represent the world. LÄS MER

7. 5. Medical Volume Visualization Beyond Single Voxel Values

   Författare :Stefan Lindholm; Anders Ynnerman; Eduard Gröller; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Medical visualization involves many complex decisions for both the user and the imaging algorithms. This thesis aims to improve medical volume visualization through a series of technical contributions to aid such decision processes. Improvements are achieved by using more data, beyond single voxels, in the associated visual analyses. LÄS MER