AccessGrid Archeological Dig Visualisation Yifan Lu u Supervised by Rhys Hawkins, Dr. Henry Gardner

Structure of presentation 1.Overview of entire project 2.Essential components of project 3.Blueprint of project 4.Issues and problems 5.Time schedule 6.References

1.Overview More than just new version of Virtual Excavation  The project continues the Virtual Excavation which had involved several escience students  The project will still follow the terms of archaeological dig, but it will bring several approaches to stimulate and present the archaeological dig, for instance Augmented Reality.

1. Overview Collaborative, augmented, data- presentable archaeological Visualization 1.Constructing shared and collaborative virtual environment through AGJuggler that takes advantages of VRJuggler and integrates it with the Access Grid which is considered as a fairly mature collaborative design platform. 2.Employing the chroma key technique to wave real users and archaeological site together and create an highly immersive simulation.

1.Overview 3.Creating a new approach allows the users to present the well-detailed 3D artefacts model using Augmented Reality.(3D artefacts are modeled according to the photos from archaeological spot, that should offer the reasonable details. ) 4.Establishing the highly immersive virtual excavation enabling the walk through presentation displayed on the wedge.

2.Essential components of project 1.Access Grid  Is a large scale group to group collaborative communication environment  Is "designed space" that explicitly contains the high- end audio and visual technology needed to provide a high-quality compelling user experience  Is ideal interactive and networked application base supporting distant visualization with multicasting

2.Essential components of project 2.Augmented Reality  Chroma key extracts user from video stream and allows substitution of a virtual background through alpha channel.

2.Essential components of project 2.Augmented Reality  ARToolkit provides a tangible augmented Reality interface using accurate vision-based tracking approach and defines a new style for user to manipulate and present virtual data.

2.Essential components of project 3.AGJuggler & VRJuggler VRJuggler is an ideal virtual reality application developing environment with cross-platform, run-time flexibility, locally distributed applications & environment and performance monitoring features. AGJuggler takes the advantages of functionalities of VRJuggler and integrates with shared collaborative environment provided by Access Grid. Finally, it contributes to the richer collaborative experience to geographically distributed users.

2.Essential components of project 4.Immersive interaction through Wedge The display is ported into the escience’s tracked interactive wedge As powerful utilities offered by wedge( e.g. Ultrasound head tracker,3D mouse), hopefully we can bring presenter into the virtual dig enabling walk through type presentations.

2.Essential components of project 5.Reconstructing the archaeological data  Image based 3D modeler PhotoModeler and ImageModeler  interactive reassemble artefacts from pieces of shreds  general site location.

3. Blueprint of project

4.Issues and problems 1.Broad topic and limited time 2.Access Grid node capability 3.Interface between AGJuggler and Wedge 4.Archaeological reconstruction from shreds 5.Video resolution vs archaeological details 6.Distributed virtual reality application’s synchronization 7.Adaptation between 2D human figure captured by chroma-key and 3D archaeological virtual site

5.Time schedule

6. References [1] L. Childers, T. Disz, R. Olson, M. E. Papka, R. Stevens,and T. Udeshi, Access Grid: Immersive Group-to-Group Collaborative Visualization,4 th International Immersive Projection Technology Workshop, [2]. Carolina Cruz-Neira, Allen Bierbaum, Patrick Hartling, Christopher Just, and Kevin Meinert. VR Juggler – An Open Source Platform for Virtual Reality Applications. In 40th AIAA Aerospace Sciences Meeting and Exhibit 2002, Reno, Nevada, January [3] AGJuggler: An architecture for virtual reality within a collaboration environment. Master's thesis, Purdue University, 2005 [4] Michael Ashikhmin, High Quality Chroma Key [5] AccessGrid website [6] ARToolkit. shared_space/ [7] Benko, H., Ishak, E., Feiner, S. "Collaborative Visualization of an Archaeological Excavation". Workshop on Collaborative Virtual Reality and Visualization (CVRV 2003). Lake Tahoe, CA. October 26–28, 2003