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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

Autor: González García, Francisco
Sbert, Mateu
Feixas Feixas, Miquel
Data: 2008
Resum: 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
Cita: 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
Accés al document: http://hdl.handle.net/10256/3062
Llenguatge: eng
Editor: IEEE
Col·lecció: info:eu-repo/semantics/altIdentifier/doi/10.1109/MCG.2008.41
info:eu-repo/semantics/altIdentifier/issn/0272-1716
Drets: Tots els drets reservats
Matèria: Entropia
Infografia
Visualització de la informació
Computer graphics
Entropy
Information visualization
Títol: Viewpoint-Based Ambient Occlusion
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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