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Títol: Automatic light source placement for maximum visual information recovery
Autor: Vázquez Alcocer, Pere Pau Veure Producció científica UPC
Editorial: North Holland
Data: jun-2007
Tipus de document: Article
Resum: The automatic selection of good viewing parameters is a very complex problem. In most cases, the notion of good strongly depends on the concrete application. Moreover, when an intuitive definition of good view is available, it is often difficult to establish a measure that brings it to the practice. Commonly, two kinds of viewing parameters must be set: camera parameters (position and orientation) and lighting parameters (number of light sources, its position and eventually the orientation of the spot). The first ones will determine how much of the geometry can be captured and the latter will influence on how much of it is revealed (i. e. illuminated) to the user. Unfortunately, ensuring that certain parts of a scene are lit does not make sure that the details will be communicated to the user, as the amount of illumination might be too small or too high. In this paper we define a metric to calculate the amount of information relative to an object that is effectively communicated to the user given a fixed camera position. This measure is based on an information-based concept, the Shannon entropy, and will be applied to the problem of automatic selection of light positions in order to adequately illuminate an object. In order to validate the results, we have carried out an experiment on users, this experiment helped us to explore other related measures.
Descripció: The definitive version is available at http://onlinelibrary.wiley.com/doi/10.1111/j.1467-8659.2007.00944.x/abstract
ISSN: 0167-7055
URI: http://hdl.handle.net/2117/13044
Apareix a les col·leccions:Altres. Enviament des de DRAC
MOVING - Grup de Recerca en Modelatge, Interacció i Visualització en Realitat Virtual. Articles de revista
Departament de Ciències de la Computació. Articles de revista
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