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Advanced illumination and view-selection techniques for volume rendering and its application to medical imaging

Volume visualization is a method of extracting information from volumetric data using interactive graphics. Volume visualization aims to assist visual interpretation of data by creating three-dimensional models that reproduce real objects with sufficient detail and speed to support interactive manipulation. Illustrative rendering enhances the perception of features in a volume. Volume rendering has two major goals: to obtain high quality images in real time, and to determine how to explore volume datasets in an effective way. In this thesis we advance in these two lines. We propose several methods to approximate global illumination with low computational cost, permitting realistic and illustrative rendering. We also present a method to automatically define transfer functions given a target distribution. In addition, we introduce a method to automatize the creation of exploded views. Finally, we explore techniques to select the best viewpoints for a volume. Several of our contributions are based on information theory.

La visualitzaci贸 de volums 茅s un m猫tode per extreure informaci贸 de dades volum猫triques mitjan莽ant imatges interactives. L鈥檕bjectiu 茅s assistir la interpretaci贸 visual de dades creant models tridimensionals que reprodueixen objectes reals amb suficient detall i velocitat per permetre鈥檔 la manipulaci贸 interactivament. La visualitzaci贸 il路lustrativa millora la percepci贸 de les caracter铆stiques d鈥檜n volum. La visualitzaci贸 de volums t茅 dos objectius principals: obtenir imatges d鈥檃lta qualitat en temps real, i determinar com explorar volums d鈥檜na manera efectiva. En aquesta tesi avancem en aquestes dues l铆nies. Proposem diversos m猫todes per aproximar la il路luminaci贸 global amb baix cost computacional, permetent la visualitzaci贸 realista i il路lustrativa. Tamb茅 presentem un m猫tode per definir autom脿ticament funcions de transfer猫ncia donada una distribuci贸 objectiu. A m茅s, presentem un m猫tode per automatitzar la creaci贸 d鈥檈xploded views. Finalment, explorem t猫cniques per seleccionar els millors punts de vista d鈥檜n volum. Diverses de les contribucions estan basades en la teoria de la informaci贸.

Universitat de Girona

Manager: Boada, Imma
Feixas Feixas, Miquel
Sbert, Mateu
Other contributions: Universitat de Girona. Institut d鈥橧nform脿tica i Aplicacions
Author: Ruiz Altisent, Marc
Date: 2012 May 4
Abstract: Volume visualization is a method of extracting information from volumetric data using interactive graphics. Volume visualization aims to assist visual interpretation of data by creating three-dimensional models that reproduce real objects with sufficient detail and speed to support interactive manipulation. Illustrative rendering enhances the perception of features in a volume. Volume rendering has two major goals: to obtain high quality images in real time, and to determine how to explore volume datasets in an effective way. In this thesis we advance in these two lines. We propose several methods to approximate global illumination with low computational cost, permitting realistic and illustrative rendering. We also present a method to automatically define transfer functions given a target distribution. In addition, we introduce a method to automatize the creation of exploded views. Finally, we explore techniques to select the best viewpoints for a volume. Several of our contributions are based on information theory.
La visualitzaci贸 de volums 茅s un m猫tode per extreure informaci贸 de dades volum猫triques mitjan莽ant imatges interactives. L鈥檕bjectiu 茅s assistir la interpretaci贸 visual de dades creant models tridimensionals que reprodueixen objectes reals amb suficient detall i velocitat per permetre鈥檔 la manipulaci贸 interactivament. La visualitzaci贸 il路lustrativa millora la percepci贸 de les caracter铆stiques d鈥檜n volum. La visualitzaci贸 de volums t茅 dos objectius principals: obtenir imatges d鈥檃lta qualitat en temps real, i determinar com explorar volums d鈥檜na manera efectiva. En aquesta tesi avancem en aquestes dues l铆nies. Proposem diversos m猫todes per aproximar la il路luminaci贸 global amb baix cost computacional, permetent la visualitzaci贸 realista i il路lustrativa. Tamb茅 presentem un m猫tode per definir autom脿ticament funcions de transfer猫ncia donada una distribuci贸 objectiu. A m茅s, presentem un m猫tode per automatitzar la creaci贸 d鈥檈xploded views. Finalment, explorem t猫cniques per seleccionar els millors punts de vista d鈥檜n volum. Diverses de les contribucions estan basades en la teoria de la informaci贸.
Format: application/pdf
Document access: http://hdl.handle.net/10803/371154
Language: eng
Publisher: Universitat de Girona
Subject: Inform脿tica
Medicina
Title: Advanced illumination and view-selection techniques for volume rendering and its application to medical imaging
Type: doctoralThesis
Repository: TDX

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