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Báo cáo khoa học: "An Automatic 3D Text-to-Scene Conversion System Applied to Road Accident Reports"

CarSim is an automatic text-to-scene conversion system. It analyzes written descriptions of car accidents and synthesizes 3D scenes of them. The conversion process consists of two stages. An information extraction module creates a tabular description of the accident and a visual simulator generates and animates the scene. We implemented a first version of CarSim that considered a corpus of texts in French. We redesigned its linguistic modules and its interface and we applied it to texts in English from the National Transportation Safety Board in the United States. . | CarSim An Automatic 3D Text-to-Scene Conversion System Applied to Road Accident Reports Ola Âkerbergt Hans Svenssonf fLund University LTH Department of Computer science Box 118 S-221 00 Lund Sweden e94oa e94hsv @efd.1th.se Pierre.Nugues@cs.lth.se Bastian Schulzị Pierre Nuguesf ỊTechnische Universitãt Hamburg-Harburg SchwarzenbergstraBe 95 D-21071 Hamburg Germany b.schulz@tuhh.de Abstract CarSim is an automatic text-to-scene conversion system. It analyzes written descriptions of car accidents and synthesizes 3D scenes of them. The conversion process consists of two stages. An information extraction module creates a tabular description of the accident and a visual simulator generates and animates the scene. We implemented a first version of Car-Sim that considered a corpus of texts in French. We redesigned its linguistic modules and its interface and we applied it to texts in English from the National Transportation Safety Board in the United States. 1 Text-to-Scene Conversion Text-to-scene conversion consists in creating a 2D or 3D geometric description from a natural language text. The resulting scene can be static or animated. To be converted the text must be appropriate in some sense that is contains explicit descriptions of objects and events for which we can form mental images. Animated 3D graphics have some advantages for the visualization of information. They can reproduce a real scene more accurately and render a sequence of events. Automatic text-to-scene conversion has been investigated in a few projects. NAL1G Adorni et al. 1984 Di Manzo et al. 1986 is an early system that was designed to recreate static 2D scenes from simple phrases in Italian. WordsEye Coyne and Sproat 2001 is a recent and ambitious example. It features a large database of 3D objects that can be animated. CogViSys Nagel 2001 Arens et al. 2002 is aimed a visualizing descriptions of simple car maneuvers at crossroads. All these systems use apparently invented narratives. 2 CarSim CarSim .