Item


Viewpoint-Based Ambient Occlusion

We’ve developed a new ambient occlusion technique based on an information-theoretic framework. Essentially, our method computes a weighted visibility from each object polygon to all viewpoints; we then use these visibility values to obtain the information associated with each polygon. So, just as a viewpoint has information about the model’s polygons, the polygons gather information on the viewpoints. We therefore have two measures associated with an information channel defined by the set of viewpoints as input and the object’s polygons as output, or vice versa. From this polygonal information, we obtain an occlusion map that serves as a classic ambient occlusion technique. Our approach also offers additional applications, including an importance-based viewpoint-selection guide, and a means of enhancing object features and producing nonphotorealistic object visualizations

© IEEE Computer Graphics and Applications, 2008, vol. 28, p. 44-51

IEEE

Author: González García, Francisco
Sbert, Mateu
Feixas Feixas, Miquel
Date: 2008
Abstract: We’ve developed a new ambient occlusion technique based on an information-theoretic framework. Essentially, our method computes a weighted visibility from each object polygon to all viewpoints; we then use these visibility values to obtain the information associated with each polygon. So, just as a viewpoint has information about the model’s polygons, the polygons gather information on the viewpoints. We therefore have two measures associated with an information channel defined by the set of viewpoints as input and the object’s polygons as output, or vice versa. From this polygonal information, we obtain an occlusion map that serves as a classic ambient occlusion technique. Our approach also offers additional applications, including an importance-based viewpoint-selection guide, and a means of enhancing object features and producing nonphotorealistic object visualizations
Format: application/pdf
Citation: Gonzalez, F., Sbert, M., i Feixas, M. (2008). Viewpoint-Based Ambient Occlusion. IEEE Computer Graphics and Applications, 28 (2), 44 - 51. Recuperat 29 setembre 2010, a http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4459864
ISSN: 0272-1716
Document access: http://hdl.handle.net/10256/3062
Language: eng
Publisher: IEEE
Collection: Reproducció digital del document publicat a: http://dx.doi.org/10.1109/MCG.2008.41
Articles publicats (D-IMA)
Is part of: © IEEE Computer Graphics and Applications, 2008, vol. 28, p. 44-51
Rights: Tots els drets reservats
Subject: Entropia
Infografia
Visualització de la informació
Computer graphics
Entropy
Information visualization
Title: Viewpoint-Based Ambient Occlusion
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

Subjects

Authors