Frederic Fol Leymarie's lecture at BME on the 10th of May is cancelled. He will present his lecture on the 14 of May instead. Frederic Fol Leymarie Dept of Computing, Goldsmiths College, University of London, UK 3D shape representation via Medial Scaffolds --- theory and applications 2007, május 14 - 12:00 óra BME, Stoczek u. 2. ST épület, III. em 320. Abstract: I will describe elements of a shape language for 3D objects and space. This early version of a shape language builds on the work and collaboration from the fields of Engineering, Applied Mathematics, Computational Geometry, Visual Perception, Arts and the Humanities. It is based on a representation for shapes taking the form of graphs, called "shock graphs" in 2D and "shock and medial scaffolds" in 3D. These incorporate ideas from well-known concepts such as the "medial axis" of H. Blum (pattern recognition), Voronoi diagrams and recent results from Singularity theory. I will illustrate the use of theses graphs in various applications. http://www.doc.gold.ac.uk/morpholingua/ <http://www.doc.gold.ac.uk/morpholingua/> http://doc.gold.ac.uk/~ffl/ <http://doc.gold.ac.uk/%7Effl/>