TY - GEN A1 - Clasen, Malte A1 - Paar, Philip A1 - Prohaska, Steffen T1 - Level of Detail for Trees Using Clustered Ellipsoids N2 - We present a level of detail method for trees based on ellipsoids and lines. We leverage the Expectation Maximization algorithm with a Gaussian Mixture Model to create a hierarchy of high-quality leaf clusterings, while the branches are simplified using agglomerative bottom-up clustering to preserve the connectivity. The simplification runs in a preprocessing step and requires no human interaction. For a fly by over and through a scene of 10k trees, our method renders on average at 40 ms/frame, up to 6 times faster than billboard clouds with comparable artifacts. T3 - ZIB-Report - 11-41 KW - level of detail KW - rendering KW - natural scene KW - Gaussian mixture model Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-14251 SN - 1438-0064 ER - TY - THES A1 - Clasen, Malte T1 - Beleuchtung von Landschaften in interaktiver Darstellung Y1 - 2005 ER - TY - CHAP A1 - Clasen, Malte A1 - Prohaska, Steffen T1 - Image-Error-Based Level of Detail for Landscape Visualization T2 - Proc. VMV 2010 Y1 - 2010 SP - 267 EP - 274 ER - TY - CHAP A1 - Paar, Philip A1 - Appleton, Katy A1 - Clasen, Malte A1 - Gensel, Maria A1 - Jude, Simon A1 - Lovett, Andrew T1 - Interactive Visual Simulation of Coastal Landscape Change T2 - ISDE Summit Y1 - 2008 ER - TY - GEN A1 - Bodden, Eric A1 - Clasen, Malte A1 - Kneis, Joachim T1 - Arithmetic coding revealed - a guided tour from theory to praxis Y1 - 2007 PB - Technical Report SABLE-TR-2007-5, Sable Research Group, School of Computer Science, McGill University ER - TY - JOUR A1 - Paar, Philip A1 - Clasen, Malte T1 - Earth, Landscape, Biotope, Plant. Interactive visualisation with Biosphere3D JF - Proceedings of CORP - 12th International Conference on Urban Planning and Spatial Development in the Information Society, May 20th - 23rd Y1 - 2007 SP - 207 EP - 214 ER - TY - CHAP A1 - Clasen, Malte A1 - Hege, Hans-Christian ED - Schulze, Thomas ED - Preim, Bernhard ED - Schumann, Heidrun T1 - Clipmap-based Terrain Data Synthesis T2 - Proc. SimVis 2007 Y1 - 2007 SP - 385 EP - 398 PB - SCS Publishing House e.V. ER - TY - CHAP A1 - Clasen, Malte A1 - Hege, Hans-Christian T1 - Terrain rendering using spherical clipmaps T2 - EuroVis 2006 - Eurographics / IEEE VGTC Symposium on Visualization Y1 - 2006 SP - 91 EP - 98 ER - TY - CHAP A1 - Röhricht, W. A1 - Clasen, Malte T1 - Multum, non multi - Hierarchische Bit Trees bei der Pflanzenverteilung mit oik T2 - Simulation in Umwelt- und Geowissenschaften. Workshop Dresden 2005 Y1 - 2005 PB - Shaker CY - Aachen ER - TY - CHAP A1 - Clasen, Malte A1 - Hege, Hans-Christian ED - Buhmann, Erich ED - Paar, Philip ED - Bishop, Ian ED - Lange, Eckart T1 - Realistic illumination of vegetation in real-time environments T2 - Trends in Real-Time Landscape Visualization and Participation Y1 - 2005 SP - 107 EP - 114 PB - Wichmann Verlag ER -