Computer Graphics Group Hans-Peter Seidel

Transcription

1 Computer Graphics Group Hans-Peter Seidel

2 Research Themes and Goals Theme: Comp.Graphics = 3D Image Analysis and Synthesis (3D Scanning, 3D Video-Processing, Geometry Processing, Visualization, Animation, Image Synthesis, High Dynamic Range Imaging ) Research Challenge: Develop good modeling tools and models to cope with huge amount of input data and facilitate further processing and rendering Goals: First class research, build useful software and validate ideas in prototype applications, develop young researchers

3 3D Image Analysis and Synthesis CAD CAD Data Data Geometry (point (point samples, volum. volum. repr. repr.. etc) etc) 3D 3D Scanners Digital Digital Cameras Multiple Video Video Input Input Streams Geometry Kinematic Model Model Texture Reflection Properties Light Light Source Light Light Field Field Low Level Model Hierarchical Object/Scene Description Segmented Objects/Scenes Combination of of real real and and synthetic objects HW HW tailored descriptions High Level Model Acquisition Processing Rendering Images Animations Multimedia

4 Structure of the Group Group established in 1999, by now fully up and running 14 PhDs + 23 PhD students + 1 project coord + 2 secretaries Group consists of 10 subgroups Shape Reconstruction and Data Modeling (A. Belyaev, I. Ivrissimtzis, C. Rössl) Mesh Processing (A. Belyaev, S. Gumhold, Z. Karni, H. Yamauchi) Vector Field Visualization (H. Theisel) 3D Animation Processing (S. Gumhold) Physics-Based Modeling and Animation of Faces and Humans (J. Haber) Learning-Based Modeling of Faces (V. Blanz) Optical Motion Capture and Free Viewpoint Video (C. Theobalt, M. Magnor) Acquisition of High Quality Reflectance Models (M. Goesele) Advanced Global Illumination (V. Havran, I. Wald, K. Myszkowski) High Dynamic Range Imaging and Perception in Graphics (K. Myszkowski) Steering committee = group coordinators + HPS

5 Changes since last Review -1- HPS at SAB-Meeting 2003: Very young group, additional responsibilities for PhD students and postdocs, a lot of talent Offers for Faculty Positions V. Blanz, W2-Professor, U. Siegen, 2005 S. Gumhold, Interim W3-Professor, TU Dresden, 2005 J. Haber, C4-Professor, TU Dresden, 2003 (declined) J. Kautz, W2-Professor, U. Bielefeld, 2005 J. Lang, Ass. Professor, U. Ottawa, Canada, 2003 H. Lensch, Visiting Ass. Professor, Stanford University, USA, 2004 U. Schwanecke, C3-Professorship, FH Wiesbaden, 2003 Upcoming PostDocs in the Fall M. Goesele (U. Washington), C. Rössl (INRIA), I. Wald (U. Utah) Three PostDocs (C. Damez, K. Dmitriev, Y. Ohtahke) left the group 12 PhD Students completed and defended their theses

6 Changes since last Review -2- Holger Theisel beame a group leader (scientific visualization), Zachi Karni and Christian Theobalt have joined the group as postdocs and have become coordinators within their research areas Bodo Rosenhahn (Auckland) will join the group as a group leader (model based computer vision) in the fall Hendrik Lensch will return from Stanford next year Highly talented pool of 23 PhD students HPS at SAB-Meeting 2005: Very young group, additional responsibilities for PhD students and postdocs, a lot of talent

7 Shape Reconstruction and Data Modeling (A. Belyaev) Surface Reconstruction Shape digitizing technologies: points scattered over a surface Fast visualization, reconstruction of missing data, editing functionality 9 Our Approach: Adaptive space subdivision + local fitting (RBF) Reconstruction of the distance field Reconstruction of sharp features via special library of local approximations Corner function Edge function Standard quadric 4 mio pts, 10-4 error 10 min on P4 1.6 GHz

8 Reconstruction of Volumetric Data with Trivariate Splines Analysis of Spline Spaces Scattered Data Approximation (cubic, left) Reconstructrion from Gridded Samples (quadratic, right) Shape Reconstruction and Data Modeling (C. Rössl)

9 Shape Reconstruction and Data Modeling (I. Ivrissimtzis) Surface Reconstruction based on Neural Meshes

10 Mesh Processing (A. Belyaev, S. Gumhold, Z. Karni, H. Yamauchi) Detection of Ridge-Valley Structures on Meshes Mesh Parametrization using discrete quasiharmonic maps

11 Vector Field Visualization (H. Theisel) Global topological feature of 3D time-dependent flow fields - saddle connections - tracking closed stream lines - cyclic fold bifurcations - tracking saddle connectors intersection of stream objects in 4D and 5D vector fields out-of of-core considerations

12 3D Animation Processing (Stefan Gumhold) Generalization of mesh processing techniques from static to dynamic geometry Two key challenges: Change of Topology / Change of Parameterization

13 Applications: Growth Simulation, Facial Reconstrution from skull data Used to create animatable head models from incomplete & noisy range scan data Landmark-based deformation using RBF approach, Texture acquisition Reference head model with anatomical structure: skin, skull, muscles, eyes, teeth, tongue Physics Based Facial Modeling and Animation (Jörg Haber)

14 Learning Based Facial Animation (Volker Blanz) See next talk

15 Opt. Motion Capture and FreeViewpoint Video (C. Theobalt, M. Magnor) Generic body model Non-intrusive silhouette-based motion capture Multi-view texturing Reflectance Measurement Real-time rendering with interactive viewpoint selection Multi-view video recording Marker-free motion capture Free-viewpoint rendering

16 Acquisition of High Quality Reflectance Models (M. Goesele) Digitizing real world light sources Modeling and rendering translucent materials

17 Advanced Global Illumination (V. Havran, I. Wald, K. Myszkowski) Real-time ray tracing and interactive global illumination (jointly with P. Slusallek s group) Interactive global illumination modeling in the car interior

18 High Dynamic Range Imaging and Perception Issues (K. Myszkowski) Contrast Mapping a tone mapping that preserves local contrast so that the images like this

19 High Dynamic Range Imaging and Perception Issues (K. Myszkowski) Contrast Mapping a tone mapping that preserves local contrast so that the images like this can look like this

20 High Dynamic Range Imaging and Perception Issues (K. Myszkowski) Contrast Mapping a tone mapping that preserves local contrast so that the images like this can look like this or can be even refined like this

21 Conference/Journal ACM SIGGRAPH Eurographics Pacific Graphics EG Rendering Symp IEEE Visualization SGP + SMI + SM ACM TOG CGF IEEE TVCG Some Statistics

22 Software Major Software Projects and Case Studies Image Based Rendering Code Base Geometric Modeling Utilities PFS Tools for Processing High Dynamic Range Images and Videos Case Studies Scanning of High Quality 3D Models (ViHAP3D) 3D Shape Repository Simulation of Display Appearance in the Car Cockpit within a VR environment (DaimlerChrysler)

23 Project Cooperations EU Project ViHAP3D (Virtual Heritage: High-Quality 3D Acquisition and Presenation) EU MINGLE (Multiresolution in Geometric Modeling) EU Project RealReflect (Real Time Visualization of Complex Reflectance Behavior in Virtual Prototyping) EU NoE (Advanced and Innovative Models and Tools for the Development of Semantic-based Systems for Handling, Acquiring, and Processing Knowledge Embedded in Multidimensional Digital Objects GIF-Project Triangle Mesh Representations DFG Schwerpunktprogramm Digital Documents BMBF Project OpenSG Ongoing Cooperation w ith Industry (DaimlerChrysler)

24 Max-Planck-Center for Visual Computing and Communication 2 years up to 3 years Phase 1: Visiting Assistant Professor Stanford U. Phase 2: Junior- Professor/ Senior Scientist MPI Informatik Tenured Faculty Appointment Computer Science, Information Technology, Electrical Engineering Start-up Funding provided by BMBF

25 Current Research Groups (May 2005)

26 Current Research Groups (May 2005)

27 Five New Research Groups (Fall 2005)

28 Prizes and Awards C. Theobalt, ATI Fellowship Programme, 2005 H.-P. Seidel: Founding Chair, Eurographics Awards Programme, 2004 V. Blanz, Eurographics 04 Best Paper Award (1 st Prize), 2004 M. Fuchs, VDI Award (Best CS Diploma Thesis at UdS), 2004 J. Kautz, Otto-Hahn-Medal, 2004 H.-P. Seidel, Eurographics Fellow, 2003 V. Blanz, Eurographics 03 Best Paper Award (1 st Prize), 2003 J. Kautz, Emmy-Nother PostDoc Fellowship, 2003 J. Kautz: DAAD PostDoc Fellowship, 2003 J. Kautz, Eduard-Martin-Prize (Best CS PhD Thesis UdS), 2003 T. Annen, Best CS Diploma Thesis at FH in Germany, 2003 H.-P. Seidel, Gottfried-Wilhelm-Leibniz Prize, 2003

29 Thank you!