+********************************************************************** * * * Einladung * * * * Informatik-Oberseminar * * * +********************************************************************** Zeit: Dienstag, 29. März 2022, 15:00 Uhr Ort: https://rwth.zoom.us/j/95327979988?pwd=VU8rT1oyVGhiZENvQ2NuVVB2UVVndz09 Referent: Janis Born M.Sc. Lehrstuhl für Informatik 8 Thema: Topological Aspects of Maps Between Surfaces Abstract: We consider the generation of high-quality maps between 3D surfaces in the form of discrete homeomorphisms. Specifically, we address the topological issues underlying the construction of such maps, which have so far received comparably little attention in geometry processing research. We approach this task from two different angles: First, we propose a robust method for the construction of maps from sparse landmark correspondences, based on compatible layout embeddings. Our robust embedding strategy systematically searches for short, natural embeddings and therefore reliably avoids a range of sporadic topological initialization errors which can occur with previous heuristic approaches. Second, we introduce a novel algorithm to extract topological map descriptions from approximate, non-homeomorphic input maps. Such a purely abstract description of map topology may then be used to guide the construction of a proper homeomorphism. As our inference method is highly robust to a wide range of map defects and imperfect map representations, this effectively allows to delegate the difficult task of finding a natural map topology to specialized shape matching methods, which have grown increasingly capable. These advancements promote the further automation of map generation techniques in two regards: They vastly reduce the need for human supervision, and make the results of automatic shape matching methods accessible for topological initialization. Es laden ein: die Dozentinnen und Dozenten der Informatik