Interactive Touch-Activated Gaming Table: Project Design Review & Prototype Update

1. TARGET:Touch-Activated Response Gaming Entertainment Table Team Siqueira: Pat DeRoy, Cory Gorman, Marc Perras Midway Design Review

2. Last time… • In PDR, we discussed our motivations and goals for the project • We also discussed design constraints and alternatives, as well as our budget and timeline • Additionally, we set goals for our MDR prototype • For MDR, we will: • Overview the project’s current status • Goals met from PDR, team roles, etc. • Discuss new design challenges and possible solutions for them • Revisit our updated timeline and budget • Give a demo of our current prototype

3. Our Current Prototype • PDR: For MDR, we want to have the table built, the IR input working, and the proper projection setup • Design Change: LLP instead of FTIR • Currently: • Table structure built, yet adjustable • Laser mounts built and lasers in position • Camera modified for picking up IR • Have captured finger touches • Experimenting and testing using tracking software in Windows • Working on aligning projector and mirror system

4. Laser Light Plane • Mount IR lasers (780nm) on the four corners of the surface • Align very close to surface (~1mm) • Use line generators to allow wide coverage • When finger is placed on surface, IR is scattered downward into camera • Occlusion is avoided by using multiple lasers

5. Block Diagram

6. Design Hurdles • Projector: • Keystone correction • Brightness • Mirror mechanism • Camera: • Filter • Focus • IR Noise • Lasers: • Strength • Mounts • Reflection • Occlusion • Table • Height • Adjustability

7. Keystone Effect

8. Design Hurdles • Projector: • Keystone correction • Brightness • Mirror mechanism • Camera: • Filter • Focus • IR Noise • Lasers: • Strength • Mounts • Focus • Occlusion • Table • Height • Adjustability

9. It Works! • But we have to prove it! • Experiment: Measure the responsiveness and false positive rate of our touch input • Responsiveness: percentage of touches the tracking software registers correctly • False positive: percentage of “touches” registered by tracking software caused by factors other than user touch

10. Results • Our goals: • Responsiveness: 99% or higher in all settings • False positives: 0.01% or lower in all settings

11. User Input to Image Processing • Community Core Vision (CCV) • Tracking software • Uses TUIO protocol which transmits finger touch data in UDP packets • We can use socket programming to receive this data as input to our games

12. What’s Next? • 1. For CDR: Acquire (build?) projector, determine alignment, get TUIO receiver working using a PC. • 2. Successfully interface board with camera and projector. (End of February) • “Draw” circles around touches. • 3. Simultaneously develop software for graphics processing, physics engine, control menus, game applications. (End of March) • 4. For FPR: Finish table, including cooling system and enclosure, and possible expansion.

13. Timeline Finishing Touches/ Expansion PC prototype Software LLP PDR CDR MDR FPR SDP Day Finished Table Interface Components Projector

14. Budget Revisited • Intel Atom: $100 • PS3 Camera: $40 • IR filter: $30 • Mirror(s): $45 • IR Lasers: 4 @ $7 = $28 • Line generators: 4 @ $3 = $12 • Laser mount materials: $10 • Casters: 4 @ $5 = $20 • Vellum: $25 • Fans: 4 @ $2 = $8 • Wood: $50 • Acrylic: $80 • DIY Projector: $250 • Tentative Total: $698

15. TARGET Website

16. Play with our table!