ECE SDP11 Team Siqueira: Pat DeRoy, Cory Gorman, Marc Perras TARGET: Touch-Activated Response Gaming Entertainment Table Midway Design Review

2 ECE SDP11 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 ECE SDP11 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 ECE SDP11 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 ECE SDP11 Block Diagram

6 ECE SDP11 Design Hurdles  Projector: Keystone correction Brightness Mirror mechanism  Camera: Filter Focus IR Noise  Lasers: Strength Mounts Reflection Occlusion  Table Height Adjustability

7 ECE SDP11 Keystone Effect

8 ECE SDP11 Design Hurdles  Projector: Keystone correction Brightness Mirror mechanism  Camera: Filter Focus IR Noise  Lasers: Strength Mounts Focus Occlusion  Table Height Adjustability

9 ECE SDP11 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 ECE SDP11 Results Light SettingDark Setting Responsiveness91.82%95.45% False Positives0.36%0%  Our goals: Responsiveness: 99% or higher in all settings False positives: 0.01% or lower in all settings

11 ECE SDP11 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 Application Layer TUIO Protocol Image Processing

12 ECE SDP11 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 ECE SDP11 Timeline PDR MDR CDR FPR SDP Day LLP Projector PC prototype Interface Components Software Finished Table Finishing Touches/ Expansion

14 ECE SDP11 Budget Revisited  Intel Atom: $100  PS3 Camera: $40  IR filter: $30  Mirror(s): $45  IR Lasers: $7 = $28  Line generators: $3 = $12  Laser mount materials: $10  Casters: $5 = $20  Vellum: $25  Fans: $2 = $8  Wood: $50  Acrylic: $80  DIY Projector: $250  Tentative Total: $698

15 ECE SDP11 TARGET Website

16 ECE SDP11 Play with our table!