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Automatic view selection using viewpoint entropy and its application to image-based modelling

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10.1111/j.1467-8659.2003.00717.x
 
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hdl:2117/10080

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Vázquez Alcocer, Pere PauMés informacióMés informacióMés informació
Feixas, Miquel
Sbert Cassasayas, Mateu
Heidrich, Wolfgang
Document typeArticle
Defense date2003
PublisherNorth Holland
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
In 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.
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. 
URIhttp://hdl.handle.net/2117/10080
DOI10.1111/j.1467-8659.2003.00717.x
ISSN0167-7055
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  • Departament de Ciències de la Computació - Articles de revista [909]
  • MOVING - Grup de Recerca en Modelatge, Interacció i Visualització en Realitat Virtual - Articles de revista [68]
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