The terms agent, intelligent agent and 3D agent are becoming more and more frequently used in literature. A key issue in the web community is that a web site must be equipped with a virtual agent able to support users in a natural way. Following this trend, we decided to implement scenographic agents mimic intelligent reasoning (SAMIR), a prototype of a tool for animating 3D intelligent agents, mainly founded on a genetic algorithms-based learning system, namely an XCS, and on an FFD-based technique for the facial deformation of the character. SAMIR is based on an object-oriented architecture, and it adopts the MPEG-4 facial animation parameters (FAPs) as a description format for facial expressions and animations
In this paper we discuss how metaphors for supporting user interaction with multimedia databases can be automatically generated. The work presented is a further step in the development of Virgilio, a Virtual Reality (VR) based system that has been designed to be a general purpose exploration tool for highly structured data. Virgilio visualizes the results of a query to a database by generating VR scenes, that exploit appropriate metaphors in order to take advantage of common knowledge about real world objects, thus reducing the cognitive load in the process of information assimilation. We analyze two specific components of the Virgilio architecture, the Query Management Tool and the Metaphor Definition Tool, and we identify a completely automatic procedure to define the metaphor that will be exploited in the construction of the VR scene. The implementation of this procedure exploits the backtracking search strategy of Prolog interpreters to solve a typical constraint satisfaction problem.
This demonstration presents a prototype system in which metaphors for supporting user interaction with multimedia databases are automatically generated. Such a prototype is a further step in the development of Virgilio, a Virtual Reality (VR) based system that has been designed to be a general purpose exploration tool for highly structured data. Virgilio visualizes the results of a query to a database by generating VR scenes, that exploit appropriate metaphors in order to take advantage of common knowledge about real world objects, thus reducing the cognitive load in the process of information assimilation. The demonstration outlines an example scenario that applies the Virgilio prototype with an electronic commerce application.
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