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dc.contributor.authorVázquez Alcocer, Pere Pau
dc.contributor.authorFeixas, Miquel
dc.contributor.authorSbert Cassasayas, Mateu
dc.contributor.authorHeidrich, Wolfgang
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Llenguatges i Sistemes Informàtics
dc.date.accessioned2010-11-03T09:49:18Z
dc.date.available2010-11-03T09:49:18Z
dc.date.created2003
dc.date.issued2003
dc.identifier.citationVázquez, P. [et al.]. Automatic view selection using viewpoint entropy and its application to image-based modelling. "Computer graphics forum", 2003, vol. 22, núm. 4, p. 689-700.
dc.identifier.issn0167-7055
dc.identifier.urihttp://hdl.handle.net/2117/10080
dc.description.abstractIn the last decade a new family of methods, namely Image-Based Rendering, has appeared. These techniques rely on the use of precomputed images to totally or partially substitute the geometric representation of the scene. This allows to obtain realistic renderings even with modest resources. The main problem is the amount of data needed, mainly due to the high redundancy and the high computational cost of capture. In this paper we present a new method to automatically determine the correct camera placement positions in order to obtain a minimal set of views for Image-Based Rendering. The input is a 3D polyhedral model including textures and the output is a set of views that sample all visible polygons at an appropriate rate. The viewpoints should cover all visible polygons with an adequate quality, so that we sample the polygons at sufficient rate. This permits to avoid the excessive redundancy of the data existing in several other approaches. We also reduce the cost of the capturing process, as the number of actually computed reference views decreases. The localization of interesting viewpoints is performed with the aid of an information theory-based measure, dubbed viewpoint entropy. This measure is used to determine the amount of information seen from a viewpoint. Next we develop a greedy algorithm to minimize the number of images needed to represent a scene. In contrast to other approaches, our system uses a special preprocess for textures to avoid artifacts appearing in partially occluded textured polygons. Therefore no visible detail of these images is lost.
dc.format.extent12 p.
dc.language.isoeng
dc.publisherNorth Holland
dc.subjectÀrees temàtiques de la UPC::Informàtica::Infografia
dc.subject.lcshRendering (Computer graphics)
dc.subject.otherComputer graphics
dc.subject.otherImage-based modelling and rendering
dc.subject.otherInformation theory
dc.subject.otherEntropy
dc.titleAutomatic view selection using viewpoint entropy and its application to image-based modelling
dc.typeArticle
dc.subject.lemacInfografia tridimensional
dc.contributor.groupUniversitat Politècnica de Catalunya. MOVING - Grup de Recerca en Modelatge, Interacció i Visualització en Realitat Virtual
dc.identifier.doi10.1111/j.1467-8659.2003.00717.x
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac2191295
dc.description.versionPostprint (published version)
local.citation.authorVázquez, P.; Feixas, M.; Sbert, M.; Heidrich, W.
local.citation.publicationNameComputer graphics forum
local.citation.volume22
local.citation.number4
local.citation.startingPage689
local.citation.endingPage700


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