The Conference as well as the Tutorials, Workshops and Mini Symposia on monday and tuesday, will take place in the Maritim Grand Hotel Hannover, directly opposite the City Hall.

Schedule

Monday

, June 22nd 1998 - Tutorials

9:00

Virtual Humans in Virtual Reality N. Magnenat-Thalmann, MIRALab Univ. of Geneva D. Thalmann, LIG, EPFL

The merging of the recent developments in Virtual Reality, Human Animation and Video Analysis techniques has led to new fields of research: the integration of Virtual Humans in Virtual reality, the interaction of the participant with these virtual humans and the representation of the participant in the Virtual World. The objective of the tutorial is to present the State-of-the-Art in this new areas which will be essential for interactive entertainment and games. This tutorial will explain the techniques for integrating virtual humans into virtual environments. It will emphasize the real-time animation techniques, real-time motion tracking and communication between the participant and the virtual humans.

9:00

Handling of Very Large 3D-Surface Datasets Using Mesh Simplification and Multiresolution Modeling R. Klein, Univ. Tübingen, W. Straßer, WSI/GRIS

This course gives an overview over the current techniques for simplifying complex polygonal surface models. Different data structures of multiresolution models contain the 3D-object at multiple levels of detail are discussed. Viewing and lighting dependent refinement of polygonal surfaces will be covered. Furthermore, compression techniques for multiresolution representations are presented. All subjects are illustrated by different applications from CAD, GIS, VR and the Web. Life demonstrations from these applications will be given.

9:00	Introduction to VRML-97 - A Practical Approach W. Broll, FIT, W. Müller, Univ. of Darmstadt, U. Spierling, GRIS, ZGDV-DECADE
	VRML-97, the Virtual Reality Modeling Language, is the official ISO standard for the exchange of 3D geometry and interactive scenes on the World Wide Web. Formerly known as VRML-2.0, it supports concepts such as 3D modeling and animation as well asinteractive application design. As such it has envolved to the basics for 3D user interfaces, 3D multi-user environments, and interactive games.

Tuesday

, June 23rd 1998

Mini Symposium: Geometric Modeling and Scientific Visualization G. Brunnett, H. Hagen, Univ. Kaiserslautern
9:00	Session 1
	Volume Modelling: Representations and Advanced Operations V. V. Savchenko, A. A. Pasko, A. I. Sourin, Univ. of Aizu, T. L. Kunii, Univ. of Hosei
	An ObjectOriented Approach to Model Scenes of Buildings T. Matthey, H. Bieri, Univ. of Berne, Switzerland
	Determining Visibility between Extended Objects A. Hinkenjann, H. Müller, Univ. of Dortmund
10:45	Session 2
	Rational Quadratic Bezier Triangles on Quadrics G. Albrecht, Tech. Univ. München, Germany
	Stability Conditions for Free Form Surfaces H. Hagen, Univ. of Kaiserslautern, Germany, S. Hahmann, Univ. Joseph Fourier, France
	Adaptive Subdivision Curves and Surfaces H. Müller, R. Jaeschke, Univ. of Dortmund, Germany
	Hierarchical Decomposition of Datasets on Irregular Surface Meshes G.P. Bonneau, A. Gerussi, Univ. Joseph Fourier, France
14:00	Session 3
	Efficient Parallel Recursive Voxelization for SGI Challenge Multi-processor System N. Stolte, Univ. of Kingston, A. E. Kaufmann, State Univ. of New York
	Interactive Navigation through Glial Cells J. Meyer, H. Hagen, C. Lohr, J. W. Deitmer, Univ. of Kaiserslautern, Germany
	Integrated Registration and Visualization of Medical Image Data P. Hastreiter, T. Ertl, Univ. of Erlangen-Nuremberg, Germany
15:45	Session 4
	Interactive Visualization of Particle Systems Backes, Dahr, Rumpf, Univ. of Bonn
	A Data Dependent Triangulation for Vector Fields G. Scheuermann, H. Hagen, Univ. of Kaiserslautern
	A Prototype System for Light Propagation in Terrains C. Stamm, S. Eidenbenz, P. Widmayer, ETH Zürich, M. Beck, P. Stucki, Univ. of Zürich, Switzerland

Mini Symposium: Geoinformation Modeling and Visualization D. Grünreich, G. Buziek, Univ. Hannover
9:00	Opening
9:10	Session 1 - Fundamentals of Geoinformation
	Geodetic Reference Systems for GeoSpatial Information Systems G. Seeber, Univ. of Hannover
	Knowledge Based Modeling and Extraction of Geo-Objects from Aerial Images C.E. Liedtke, Univ. of Hannover
	Open GIS W. Kuhn, Univ. of Münster, Germany
10:45	Session 2 - Data Modelling (Fundamentals and New Tools)
	3D and 4D Data Modelling L. Plümer, Univ. of Vechta
	Automated Generalization of Geoinformation - Concepts and Solutions D. Grünreich, Univ. of Hannover, Germany
	Visualizing 3D Geographical Data with VRML J. Shan, Univ. of College Gävle, Sweden
	Integration of GIS and VRML J.D. Stüwe, C. Lenz, G. Domik, Univ. of Paderborn, Germany
	Geovisualization with the Objectoriented 3D Modeling and Animation System MAM/VRS J. Doellner, K. Hinrichs, Univ. of Münster, Germany
14:00	Session 3: Visualization Issues
	Collaborative Geographic Visualization T.-M. Rhyne, Lockheed Martin / EPA Scientific Visualization Center, USA
	Application of Cognition Principles for Cartographic Visualization G. Buziek, Univ. of Hannover
	Multimedia Atlases: Online and offline applications C. Haeberling, C. Oberholzer, Swiss Federal Institute of Technology, Zürich
15:50	Session 4: Examples and Applications
	WebVizard: Intelligent System for Geodata Visualization and CBT in the WWW S. Goebel, Fraunhofer Institute for Computer Graphics, Darmstadt, Germany
	Using GIS to Visualize Environmental Information A. Clematis, M. DeMartino, National Research Council, Genova, Italy
	Interpolation and Display of Statistical Surfaces W. D. Rase, Bonn

Mini Symposium: Graphical Aspects of Digital Libraries D. Fellner, Univ. Bonn, W. Straßer, Univ. Tübingen
9:00	Opening D.Fellner
9:15	Invited Lecture Tree visualisation and navigation clues for information visualisation I. Herman, CWI Amsterdam
10:30	Session 1
	Generalized electronic documents D. Fellner, Univ. Bonn
	Efficient storage, compression and transmission of complex polygonal 3D models L. Kobbelt, H-P. Seidel, Univ. Erlangen
	Texture dependent refinement of multiresolution meshes R. Klein, W. Straßer, Univ. Tübingen
14:00	Session 2
	Syntactic and semantic analysis of video sequences to support content based image retrieval O. Herzog, Univ. Bremen
	Digital Watermarking of Text, Image and Video Documents B. Girod, F. Hartung, J. Su, Univ. Erlangen
	ATLAS 2000: new techniques to preprocess, access, and visualize data for digital maps D. Saupe (Univ. Leipzig), H. Gossmann, Univ. Freiburg
	Visualizing chemical data in the Internet based on digital documents with embedded data driven and interactive graphics W-D. Ihlenfeldt, T. Ertl, Univ. Erlangen
16:00	Panel
	'Graphics and the Web' - Another buzzword or two complementary disciplines? Current deficits? New Directions? Panelists B. Girod, W-D. Ihlenfeldt, Univ. Erlangen, I. Herman, CWI Amsterdam, O. Herzog, Univ. Bremen, W. Straßer, Univ. Tübingen

9:00

Tutorial: Envisioning for Computer Graphics G. Wyvill, Univ. of Otago, New Zealand

A cube lies on a flat surface. Imagine a vertical plane that passes through the diagonal of the cube's top face. The cross-section of the cube in this plane is a rectangle. Rotate the plane through a right angle about the diagonal of this rectangle. What is the shape of the cross-section of the cube in the rotated plane? The new plane cuts two edges of the cube at their mid-points. Rotate the plane by a right angle about the line joining these mid-points. What is the shape of the cross-section of the cube in the twice - rotated plane? Most people find this kind of question almost impossibly difficult. But if you are working in three dimensional design or computer graphics programming, you should be able to do it easily and in your head. In this workshop, you can begin to learn how to visualize in three dimensions.

Wednesday

, June 24th 1998

Conference Program
9:15	Welcome & Opening
9:45	Keynote Lecture Human Media Technology - The Human-centered, Sustainable Technology Development J. L. Encarnação, Univ. of Darmstadt
10:50	Invited Lecture Virtual humans and Cyber Dance N. Magnenat-Thalmann, Univ. of Geneva
11:35	Speaker from Industry Fahrenheit: A Platform for Graphics Innovation Mike Kelley, SGI
14:00	Session 1A: Virtual Reality	Session 1B: Raytracing
	Real Time Muscle Deformations using MassSpring Systems D. Thalmann, L. Nedel, Swiss Federal Institute of Technology	Visibility as an Intrinsic Property of Geometric Models G. Elber, A. Bar-Lev, Israel Institute of Technology
	Multiresolution Triangular BSpline Surfaces A. Dreger, M. Gross, Eidgenössische Technische Hochschule	Hierachical Visibility Culling with Occlusion Trees J. Bittner, V. Havran, P. Slavik, Czech Technical Univ.
	Virtual 3D Sculpturing with a Parametric Hand Surface J.P.Y. Wong, R.W.H. Lau, Hong Kong Polytechnic Univ., L. Ma Zhejiang Univ.	Fast Approximate Quantitive Visibility for Complex Scenes Y. Chrysanthou, UCL Univ. of London, D. Cohen-Or, Tel Aviv Univ., D. Lischinski, Hebrew Univ. of Jerusalem
	Sculpting and Animating in a Desktop VR Environment R. Noble, Robert Gordon Univ., G. Clapworthy, De Montfort Univ.	An AntiAliasing Method for Parallel Rendering S. Lin, R.W.H. Lau, Hong Kong Polytechnic Univ., X. Lin, P.Y.S. Cheung, Univ. of Hong Kong
15:45	Posters 1A: Virtual Reality Posters 1B: Visualization & Rendering Integrating of Basic CAD Functions into a VR Environment R. Rabaetje, Volkswagen AG The Analysis and Reconstruction of Repetitive Textures C. Handley, Univ. of Otago Performing 3D Scene and Animation Authoring Task Efficiently: An Innovative Approach C. Elcacho, A. Schaefer, R. Dörner, V. Luckas, Fraunhofer Institut Object and Ray Coherence in the Optimization of the Ray Tracing Algorithm P. Gonzalez, Univ. de Castilla La Mancha, F. Gisbert, Univ. de Politecnia de Madrid, Spain An Adaptable Modular Software Architecture for Distant Control of Virtual Actors J. Piesk, H. Heimbrecht, R. Opalla, G. Trogemann, Academy of Media Arts Rendering Objects with Small Elements Based on Their Micro and Macro Structures M. Terasawa, Nihon Univ., F. Kimura, Univ. of Tokyo Controlling Objects Natural Behaviors with a 3D Declarative Modeler G. Kwaiter, V. Gaildrat, R. Caubet, Paul Sabatier Univ. On Optimality of OBBs for Visibility Tests for Frustum Culling, Ray Shooting and Collision Detection A. Iones, S. Zhukov, A. Krupkin, St. Petersburg State Technical Univ., Russia
16:25	Session 2A: Virtual Reality	Session 2B: Modeling
	Interactive, Animated 3D Widgets J. Doellner, K. Hinrichs, Wilhelms Univ. Münster	Graph Based Surface Reconstruction Using Structures in Scattered Points Sets R. Mencl, H. Müller, Univ. of Dortmund
	Virtual Worlds A Virtual Environment Architecture M. de Oliveira, J. Pereira, Univ. of Lisbon	Incremental Techniques for Implicit Surface Modeling E. Galin, S. Akkouche, Ecole Centrale de Lyon

Thursday

, June 25th 1998

Conference Program
9:00	Invited Lecture Interactive Exploration of Distributed 3D Databases over the Internet J. Rossignac, Georgia Institute of Technology Atlanta
9:45	Session 3A: CAM	Session 3B: Digital Libraries and Data Bases
	Real Time Simulation & Visual. of NC Milling Processes for Inhom. Materials on Low-End Graphics Hardware E. Groeller, A. König, Techn.Univ. of Vienna	Image Retrieval in Digital Libraries Based on Symmetry Detection K. Cheung, H. Ip, City Univ. of Hong Kong
	Computational Metrology of the Circle C. Guo, APLEX, J. Pegna, Concordia Univ. Montreal	An Architecture of a Universal DBMS for Graphics Applications A. Collison, H. Bieri, Univ. of Bern
10:35	Posters 2A: Virtual Reality Posters 2B: Multimedia & Virtual Environments Developing Physics Based Models in Virtual Reality for Dynamic Emulation of Robotic Systems Y. Li, J. Wang, J. Ho, City Univ. of Hong Kong Visualization of Meteorological Data using an Interactive Flight M. Köig, C. Lenz, G. Domik, Univ. GH Paderborn Integrating Molecular Modeling Tools & VR Engines - An Architecture for a Highly Immersive Molec. Mod. Env. R. Drees, Univ. of Stuttgart CVP: Recognizable and hierarchical 3D Overviews of the WWW by Persistence Directory Placement S. Adler, J. Heise, M. Mayer, P. Schefe, Univ. of Hamburg Deforming Virtual Objects with an Instrumented Glove K. Hui, M. Ma, Chinese Univ. of Hong Kong An Array Processor Architecture with Parallel Data Caches for Images Rendering and Composition M. Berekovic, P. Pirsch, Univ. of Hannover 3D-Visualization of Garments K. Roediger, Univ. of Bremen
11:15	Session 4A: Modeling	Session 4B: Geographic Information Systems	V E N D O R S E S S I O N I
	Ridges and Ravines on Implicit Surfaces A. Belyaev, A. Pasko, Univ. of Aizu, T. Kunii, Hosei Univ.	The Styria Flyover LoD management for huge textured DTM models M. Kofler, M. Gruber, Graz Univ. of Technology, M. Gervautz, TU Wien
	Uncertainity coding and controlled data reduction using FuzzyBSplines G. Gallo, Univ. of Catania, M. Spagnuolo, IMA Istituto per la Matematica Applicata	3D Visualization and Exploration of Remote Sensing Data S. Growe, P. Schulze, R. Toenjes, Univ. Hannover
	Robust tesselation of trimmed rational B-Spline surface patches W. Cho, T. Maekawa, N. M. Patrikalakis, J. Peraire, MIT	Floating Ring: A New Tool for Visualizing Distortion in Map Projections J. Brainerd, A. Pang, Univ. of California-Santa Cruz
14:00	Special Lecture 3D modeling for communications L. v. Gool, Univ. of Leuven	Special Lecture Constrained B-Spline Surface Approximation of Irregular Distributed Data - A Geometric Concept of Reverse Engineering J. Hoschek, TH Darmstadt
14:30	Session 5A: Graphics & Communication	Session 5B: Approximation	V E N D O R S E S S I O N II
	Synthesis of Facial Expressions for Semantic Coding of Videophone Sequences M. Kampmann, B. Nagel, Univ. of Hannover	Towards an Understanding of Surfaces through Polygonization W. Seibold, G. Wyvill, Univ. of Otago
	Automatic Creation of Flexible Antropomorphic Models for 3D Videoconferencing S. Weik, J. Wingbermuehle, W. Niem, Univ. of Hannover	On Polyhedral Approximations To A Sphere D. Fox, K. Joy, Univ. of California-Davis
	Illumination Analysis for Synthetic/Natural Hybrid Image Sequence Generation J. Stauder, Univ. Hannover	Polyhedral approximation and first order segmentation of unstructured point sets F. Isselhard, G. Brunnett, T. Schreiber, Univ. Kaiserslautern
15:45	Posters 3A: Multimedia & Virtual Environments Posters 3B: Geometric Modeling Digital Robbery; Authors are not Unprotected J. Garofalakis, P. Kappos, S. Sirmakessis, Univ. of Patras Visualization of Noh Mask Curvature Features J. Takagi, Belyaev, Univ. of Aizu, T. Kunii, Hosei Univ. VEplatform: A Base System for Distributed Virtual Reality K. Demuynck, J. Broeckhove, F. Arickx, Univ. of Antwerp (RUCA) Implicit Surface Reconstruction from 2D CT Scan Sections S. Pontier, B. Shariat, D. Vandorpe, Univ. of Lyon Scaling VR In VRML: Integrating Different VR Methodologies In A VRML Browsing System A. Schaefer, V. Luckas, R. Doerner, F. Seibert, H. Ziegler, Computer Graphics Center A Method for Filling n-Sided Holes in a Surface A. Savva, Intercollege, Cyprus, G. Clapworthy, De Montfort Univ. Integration Techniques for 3D Surface Reconstructionn H. Thiele, R. Klette, Univ. of Auckland
16:25	Session 6A: 3D Modeling of Buildings	Session 6B: Modeling
	3D Modelling of Buildings using HighLevel Knowledge O. Grau, Univ. Hannover	Varying Neighbourhood Parameters for the Computation of Normals on Surfaces in Discrete Space G. Thuermer, C. Wuethrich, Bauhaus Univ. of Weimar
	SemiAutomatic Modelling of Urban Buildings from High Resolution Aerial Imagery J. Vandekerckhove, D. Frere, T. Moons, L. Van Gool, Katholieke Univ. Leuven	Improved triangular subdivision schemes H. Prautzsch, G. Umlauf, Univ. of Karlsruhe
	Automatic 3D Model Acquisition from Uncalibrated Image Sequences R. Koch, M. Pollefeys, L.Van Gool, Katholieke Univ. Leuven	Efficient and Reliable Triangulation of Polygons M. Held, Univ. of Salzburg

The Vendor Sessions will be held parallel to the regular conference sessions. The participating organisations are AVS, ICEM, mb Software and SUN. Further informations about the commercial presentations can be found on the Papers page.

Friday

, June 26th 1998

Conference Program
9:00	Invited Lecture A Shape Abstraction Paradigm for Modeling Geometry and Semantics B. Falcidieno, M. Spagnuolo, Genova, Italy
9:45	Session 7A: Radiosity	Session 7B: Modeling
	Random Walk Radiosity with Generalized Absorption Probabilities M. Sbert, Univ. de Girona	Illumination dependent Refinement of Multiresolution Meshes R. Klein, A. Schilling, W. Straßer, Univ. Tübingen
	Automatic Exposure in Computer Graphics Based on the Minimum Information Loss Principle L. Neumann, K. Matkovic, W. Purgathofer, TU Wien	Geometric- and Parametric-Tolerance Constraints in Variational Design of Multiresolution Curves and Surfaces S. Takahashi, Gunma Univ.
10:35	Posters 4A: Visualization & Rendering Posters 4B: Geometric Modeling Tailor Made Dynamic Programming for Edge Matching D. Tefera, K. Harada, Hiroshima Univ. A New Type of FreeForm Curve Given By An Integral Form K. Miura, T. Nakaseko, Shizuoka Univ., T. Ikedo, Univ. of Aizu Memory Management Schemes for Radiosity Computation in Complex Environments D. Meneveaux, K. Bouatouch, E. Maisel, IRISA Design of Anisotropic Functions within Spatial Analysis of Data A. Molina, F. Higueruela, Univ. de Jaen Using Scattered Data Interpolation for Radiosity Reconstruction A. Hinkenjann, G. Pietrek, Univ. of Dortmund Modelling by a Rational Spline with Interval Shape Control M. Sarfraz, M. Al-Mulhem, J. Al-Ghamdi, M. Raheem, King Fahd Univ. of Petroleum and Minerals
11:15	Session 8: Visualization and Rendering
	Visualization of Fluid Displacement in Porous Media L. Fedenczuk, B. Wyvill, Univ. of Calgary
	Deformable Surfaces for Feature Based Indirect Volume Rendering C. Lürig, L. Kobbelt, T. Ertl, Univ. Erlangen
	Hierarchical 3D Meshes for Volume Data Visualization R. Grosso, G. Greiner, Univ. Erlangen
14:00	Session 9: Virtual Reality
	THIN vs. FAT Visualization clients M. Jern, Advanced Visual Systems
	Virtual Reality New Methods for Improving and Accelerating the Development process in Vehicle Style F. Purschke, M. Schulze, P. Zimmermann, VW
14:40	Closing