1 / 29

Welcome to the closing day of ARC ARCHEOS

Welcome to the closing day of ARC ARCHEOS. George Drettakis REVES/INRIA, Sophia-Antipolis, France. ARC ARCHEOS. National funding for inter-group research idea developed with J. Thollot and the ERGA group in Grenoble (F. Letoublon) NPR research for archeology in an immersive VE context

nola
Download Presentation

Welcome to the closing day of ARC ARCHEOS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Welcome to the closing day of ARC ARCHEOS George Drettakis REVES/INRIA, Sophia-Antipolis, France

  2. ARC ARCHEOS • National funding for inter-group research • idea developed with J. Thollot and the ERGA group in Grenoble (F. Letoublon) • NPR research for archeology in an immersive VE context • coordinated by REVES

  3. General Goals • Bring together archeologists, historians and graphics, VE researchers • a small number of groups/people • specific projects (NPR/Argos) • Advance CG research for archeology • emphasis on NPR approaches • general rendering/representation issues

  4. Achievements • Meetings and discussions • interdisciplinary meetings • core ERGA/ARTIS/ENS/REVES • several external contributors • Piérart, Pariente for Argos/archeology • Deussen, Ostromoukhov on the NPR side • Very productive • good contacts have been established

  5. CG Research • Canvas paper (Cunzi et al) • Graphics Interface 03 publication

  6. CG Research • Crowd paper (Heigias et al) • Graphicon paper

  7. CG Research • Watercolor rendering • Pascal Barla with Joelle Thollot • DEA (Master’s) • work continues as a Ph.D.

  8. CG/VE Research • Discussion on Realistic vs NPR representations

  9. CG/VE Research • NPR on a semi-immersive system • 6-month internship (Roman Bayon) • ported Raskar ’s algorithm to workbench • first port of Canvas algorithm to workbench • Interesting issues in 3D

  10. Archeological Forums • Poster at International Congress of Classical Archaeology 2003 • presented by Isabelle Ratinaud and Joelle Thollot

  11. Archeological Forums • Seminar at Fribourg • Isabelle Ratinaud • Argos symposium at the EFA in Athens • Isabelle Ratinaud and Matthieu Cunzi • presentation of the canvas crowd and VE demo work

  12. Demos on the Workbench • virtual reconstruction of Argos Agora • reconstruction in Hellenistic Age • two hypotheses for the Tholos • mix of rendering styles • Raskar+crease object renderings • époques • classical and geometric periods

  13. Closing Day • Morning • presentations of research results • demos on the workbench • Afternoon • roundtable of archeologists/historians and CG/VE researchers

  14. Enjoy...

  15. Expressive and Realistic Renderings on a workbench Roman Bayon George Drettakis REVES/INRIA, Sophia-Antipolis, France

  16. Overall Goals • expressive rendering on a workbench • chose fast and simple solution (Raskar) • integrate with existing software tools • canvas in stereo • try and adapt the subjective canvas impression to a stereo context

  17. Software Engineering • handling stereo • CAVElib • software engineering choices • REVES API - lab common API • SGI Performer-based solution

  18. XP Extensible Scenegraph • developed at EVL and FHW • wrapper scene graph for SGI Performer • message handling and input events • extensible C++ classes • easy to add a new feature/rendering type • allowed fast adaptation to bench • complicates more sophisticated uses of OpenGL

  19. Solutions adopted • REVESAPI • compatibility problems • scenegraph dependencies • native performer class • raskar renderer in a separate Performer ”channel” • find crease lines in preprocessing pass

  20. Canvas • what are we doing ? • subjective effect, NOT the same thing • canvas inherently a 2D solution • straightforward port • shower glass effect i.e., canvas is stuck on the screen or some other fixed point

  21. Canvas in Stereo • First attempts • manipulate texture coordinates • use paralax and motion cues for stereo effect • a different effect will result • choose parameters giving satisfactory subjective result

  22. Demos • work with Alexandre Olivier-Mangon • Argos environments built in Maya • scripting done in XP • additional functionalities added to XP • Emmanuel Gallo (multiswitch, transparency etc). • Davd Geldreich (Gamepad interface)

  23. Tholos Demo • Hellenistic period • 6 buildings in the Agora • added houses based on Alix • added trees • point based rendering [Stamminger Drettakis 01] • shadows for the Tholos • perspective shadow maps [Stamminger Drettakis 02]

  24. Tholos Demo

  25. Expressive rendering demo • Raskar for silhouette rendering • precomputed crease lines • simple color materials • painted sky dome • mix-mode rendering • actual stones textured/realistic

  26. Expressive rendering demo

  27. Epoques demo • geometric period • artifacts • first helmet/armor in Hellenic history • vase • simple houses • classical period • Agora was relatively empty

  28. Issues for Demos • frame rate and scene complexity • intensified by multi-pass solutions (Raskar) • transparency • help archeologists place objects • can be a constraint • interaction tools • many more could be imagined

  29. Future Work • Adapt different types of expressive renderings to stereo • stereo implies problems for silhouette-based approaches • interesting effects could result, but only practical tests can validate them • Drawing styles are a nice form of abstraction

More Related