Gérard Subsol – författare

Three-dimensional surface meshes are the most common discrete representation of the exterior of a virtual shape. Extracting relevant geometric or topological features from them can simplify the way objects are looked at, help with their recognition, and facilitate description and categorization according to specific criteria. This book adopts the point of view of discrete mathematics, the aim of which is to propose discrete counterparts to concepts mathematically defined in continuous terms. It explains how standard geometric and topological notions of surfaces can be calculated and computed on a 3D surface mesh, as well as their use for shape analysis. Several applications are also detailed, demonstrating that each of them requires specific adjustments to fit with generic approaches. The book is intended not only for students, researchers and engineers in computer science and shape analysis, but also numerical geologists, anthropologists, biologists and other scientists looking for practical solutions to their shape analysis, understanding or recognition problems.

In September 2001, we organized the 1st International Conference on Virtual Sto- telling in Avignon, France. This was the ?rst international scienti?c event entirely - voted to the new discipline that links the ancient human art of storytelling to the latest high technologies of the Virtual Reality era. Since this date, technology has not slowed its course. We all know that personal computers are even more powerful, but there have been huge advances in graphics boards.These arenowprogrammableandcan renderin realtime hugequantitiesof data as well as special effectsthat until recently requireda dedicatedgraphicssuperworks- tion. Applications that were in the research lab have now come to market. 3D Virtual Humans, the heroes of today's video games, are taking their ?rst steps on e-business Web sites. These will be the stars of tomorrow. New topics are being intensively - searched, especially, mixed and enhanced realities - the art of combining synthesized with real worlds. This evolution raises many technical, applicational, artistic and even ethical qu- tions.Theoccasionofthe2ndInternationalConferenceonVirtualStorytellingprovided an excellentopportunityto onceagaingatherresearchersfromthe scienti?c, artistic and industrialcommunitiestodemonstratenewmethodsandtechniques.Thiswasthevenue to show the latest results, and exchange concepts and ideas about the use of Virtual - ality technologiesfor creating, populating,renderingand interactingwith stories, wh- ever their form, be it theatre, movie, cartoon, advertisement, puppet show, multimedia work, video games, etc.

The 1st International Conference on Virtual Storytelling took place on September 27–28, 2001, in Avignon (France) in the prestigious Popes’ Palace. Despite the tragic events of September 11 that led to some last-minute cancellations, nearly 100 people from 14 different countries attended the 4 invited lectures given by international experts, the 13 scientific talks and the 6 scientific demonstrations. Virtual Storytelling 2003 was held on November 20–21, 2003, in Toulouse (France) in the Modern and Contemporary Art Museum “Les Abattoirs.” One hundred people from 17 different countries attended the conference composed of 3 invited lectures, 16 scientific talks and 11 posters/demonstrations. Since autumn 2003, there has been strong collaboration between the two major virtual/digital storytelling conference series in Europe: Virtual Storytelling and TIDSE (Technologies for Interactive Digital Storytelling and Entertainment). Thus the conference chairs of TIDSE and Virtual Storytelling decided to establish a 2 year turnover for both conferences and to join the respective organizers in the committees. For the third edition of Virtual Storytelling, the Organization Committee chose to extend the conference to 3 days so that more research work and applications could be be presented, to renew the Scientific and Application Board, to open the conference to new research or artistic communities, and to call for the submission of full papers and no longer only abstracts so as to make a higher-level selection.