7 results
Search Results
Now showing 1 - 7 of 7
Item Point-Based Computer Graphics(Eurographics Association, 2003) Alexa, Marc; Dachsbacher, Carsten; Gross, Markus; Pauly, Mark; van Baar, Jeroen; Zwicker, Matthias-Item Steerable Texture Synthesis(Eurographics Association, 2004) Taponecco, Francesca; Alexa, Marc; M. Alexa and E. GalinTexture synthesis is typically concerned with the creation of an arbitrarily sized texture from a small sample, where the pattern of the generated texture should be perceived as resembling the example. Most of the current work follows a Markov model approach. The texture is generated by finding best matching pixels or patches in the sample and then copying them to the target. Here we extend this concept to incorporate arbitrary filters acting on the sample before matching and transferring. The filters may vary over the generated texture. Steering the filters with properties connected to the output image allows generating a variety of effects.Item Hybrid Ambient Occlusion(The Eurographics Association, 2009) Reinbothe, Christoph K.; Boubekeur, Tamy; Alexa, Marc; D. Ebert and J. KrügerAmbient occlusion captures a subset of global illumination effects, by computing for each point of the surface the amount of incoming light from all directions and considering potential occlusion by neighboring geometry. We introduce an approach to ambient occlusion combining object and image space techniques in a deferred shading context. It is composed of three key steps: an on-the-fly voxelization of the scene, an occlusion sampling based on this voxelization and a bilateral filtering of this sampling in screen space. The result are smoothly varying ambient terms in occluded areas at interactive frame rates without any precomputation. In particular, all computations are performed dynamically on the GPU while eliminating the problem of screen-space methods, namely ignoring geometry that is not rasterized into the Z-buffer.Item Competitive Runtime Performance for Inverse Kinematics Algorithms using Conformal Geometric Algebra(The Eurographics Association, 2006) Hildenbrand, Dietmar; Fontijne, Daniel; Wang, Yusheng; Alexa, Marc; Dorst, Leo; Dieter Fellner and Charles HansenConformal geometric algebra is a powerful tool to find geometrically intuitive solutions. We present an approach for the combination of compact and elegant algorithms with the generation of very efficient code based on two different optimization approaches with different advantages, one is based on Maple, the other one is based on the code generator Gaigen 2. With these results, we are convinced that conformal geometric algebra will be able to become fruitful in a great variety of applications in Computer Graphics.Item Interactive Shape Modeling(The Eurographics Association, 2005) Alexa, Marc; Angelidis, Alexis; Cani, Marie-Paule; Singh, Karan; Zorin, Denis; Ming Lin and Celine LoscosThe course will present the state-of-the-art in digital modeling techniques, both in commercial software and academic research. The goal of this course is to impart the audience with an understanding of the big open questions as well as the skills to engineer recent research in interactive shape modeling applications.Item Mesh Morphing(Eurographics Association, 2001) Alexa, MarcMeshes have become a widespread and popular representation of models in computer graphics. Morphing techniques aim at transforming a given source shape into a target shape. Morphing techniques have various applications ranging from special effects in television and movies to medical imaging and scientific visualization. Not surprisingly, morphing techniques for meshes have received a lot of interest lately. This state of the art report sums up recent developments in the area of mesh morphing. It presents a consistent framework to classify and compare various techniques approaching the same underlying problems from different angles.Item Point Based Computer Graphics(Eurographics Association, 2002) Gross, Markus; Pfister, Hanspeter; Zwicker, Matthias; Pauly, Mark; Stamminger, Marc; Alexa, Marc-