@misc{Clasen, type = {Master Thesis}, author = {Clasen, Malte}, title = {Beleuchtung von Landschaften in interaktiver Darstellung}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-9906}, school = {Zuse Institute Berlin (ZIB)}, abstract = {Inhalt dieser Diplomarbeit ist ein Beleuchtungs- und Visualisierungsmodell f{\"u}r Pflanzen im interaktiven Landschaftsrendering. Ziel ist die qualitativ hochwertige Darstellung von einzelnen Individuen nahe des Betrachters, der seine Position in einer ansonsten statischen Szene frei w{\"a}hlen kann. Um dies zu erreichen wird zun{\"a}chst vorgestellt, wie ausgehend von einfachen 3D-Modellen und Materialien ein physikalisch basiertes Reflexionsmodell parametrisiert werden kann. Grund hierf{\"u}r ist der oftmals vorhandene umfangreiche Datenbestand, der auf die OpenGL-Materialien oder {\"a}hnliche Shader optimiert ist. Anschließend wird gezeigt, wie die Echtzeit-Renderingtechniken Shadow Mapping und Precomputed Radiance Transfer kombiniert werden k{\"o}nnen, um sowohl exakte hochfrequente direkte Beleuchtung als auch niederfrequentes indirektes Streulicht zu ber{\"u}cksichtigen. Diese Kombination wird an Hand der Pfad-Notation des Monte-Carlo-Path-Tracing eingef{\"u}hrt und begr{\"u}ndet.}, language = {de} } @misc{Clasen2005, type = {Master Thesis}, author = {Clasen, Malte}, title = {Beleuchtung von Landschaften in interaktiver Darstellung}, year = {2005}, language = {en} } @inproceedings{PaarAppletonClasenetal.2008, author = {Paar, Philip and Appleton, Katy and Clasen, Malte and Gensel, Maria and Jude, Simon and Lovett, Andrew}, title = {Interactive Visual Simulation of Coastal Landscape Change}, series = {ISDE Summit}, booktitle = {ISDE Summit}, year = {2008}, language = {en} } @inproceedings{ClasenProhaska2010, author = {Clasen, Malte and Prohaska, Steffen}, title = {Image-Error-Based Level of Detail for Landscape Visualization}, series = {Proc. VMV 2010}, booktitle = {Proc. VMV 2010}, pages = {267 -- 274}, year = {2010}, language = {en} } @misc{BoddenClasenKneis2007, author = {Bodden, Eric and Clasen, Malte and Kneis, Joachim}, title = {Arithmetic coding revealed - a guided tour from theory to praxis}, publisher = {Technical Report SABLE-TR-2007-5, Sable Research Group, School of Computer Science, McGill University}, year = {2007}, language = {en} } @article{PaarClasen2007, author = {Paar, Philip and Clasen, Malte}, title = {Earth, Landscape, Biotope, Plant. Interactive visualisation with Biosphere3D}, series = {Proceedings of CORP - 12th International Conference on Urban Planning and Spatial Development in the Information Society, May 20th - 23rd}, journal = {Proceedings of CORP - 12th International Conference on Urban Planning and Spatial Development in the Information Society, May 20th - 23rd}, pages = {207 -- 214}, year = {2007}, language = {en} } @inproceedings{ClasenHege2007, author = {Clasen, Malte and Hege, Hans-Christian}, title = {Clipmap-based Terrain Data Synthesis}, series = {Proc. SimVis 2007}, booktitle = {Proc. SimVis 2007}, editor = {Schulze, Thomas and Preim, Bernhard and Schumann, Heidrun}, publisher = {SCS Publishing House e.V.}, pages = {385 -- 398}, year = {2007}, language = {en} } @inproceedings{RoehrichtClasen2005, author = {R{\"o}hricht, W. and Clasen, Malte}, title = {Multum, non multi - Hierarchische Bit Trees bei der Pflanzenverteilung mit oik}, series = {Simulation in Umwelt- und Geowissenschaften. Workshop Dresden 2005}, booktitle = {Simulation in Umwelt- und Geowissenschaften. Workshop Dresden 2005}, publisher = {Shaker}, address = {Aachen}, year = {2005}, language = {en} } @inproceedings{ClasenHege2006, author = {Clasen, Malte and Hege, Hans-Christian}, title = {Terrain rendering using spherical clipmaps}, series = {EuroVis 2006 - Eurographics / IEEE VGTC Symposium on Visualization}, booktitle = {EuroVis 2006 - Eurographics / IEEE VGTC Symposium on Visualization}, pages = {91 -- 98}, year = {2006}, language = {en} } @incollection{ClasenHege2005, author = {Clasen, Malte and Hege, Hans-Christian}, title = {Realistic illumination of vegetation in real-time environments}, series = {Trends in Real-Time Landscape Visualization and Participation}, booktitle = {Trends in Real-Time Landscape Visualization and Participation}, editor = {Buhmann, Erich and Paar, Philip and Bishop, Ian and Lange, Eckart}, publisher = {Wichmann Verlag}, pages = {107 -- 114}, year = {2005}, language = {en} } @misc{ClasenPaarProhaska, author = {Clasen, Malte and Paar, Philip and Prohaska, Steffen}, title = {Level of Detail for Trees Using Clustered Ellipsoids}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-14251}, number = {11-41}, abstract = {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.}, language = {en} }