1. Electrical and Computer Engineer Large Portable Projected Peripheral Touchscreen Team Jackson Brian Gosselin Jr. Greg Langlois Nick Jacek Dmitry Kovalenkov L3PT Final Project Review

2. 2 Electrical and Computer Engineering L3PT Overview  Peripheral for interacting with a computer  Projects an interactive screen on wall or table  Provides a large workspace & remains portable

3. 3 Electrical and Computer Engineering System Block Diagram

4. 4 Electrical and Computer Engineering Accomplishments  Physical assembly  Image processing  Calibration  Multitouch capabilities  Linux Driver  Graphical user interface

5. 5 Electrical and Computer Engineering Image Processing  Use OpenCV libraries  Process each video frame in real time  Filters out ranges of RGB values  Detects center coordinates of blobs

6. 6 Electrical and Computer Engineering Calibration  Compensates for the size of the projected screen  Touch four corners of projected screen  Coordinates are scaled to corresponding PC coordinates  Accounts for skew

7. 7 Electrical and Computer Engineering Physical Assembly  Portable  Large workspace  Telescoping rod for adjusting screen size  Adjustment for wall or table projection

8. 8 Electrical and Computer Engineering Multitouch Capabilities  Ubuntu instead of Windows 7  Two “finger” gestures Tap Double tap Drag Pinch / Reverse Pinch Rotate Right click  Gestures are application specific

9. 9 Electrical and Computer Engineering Linux Driver  Use uinput system  Creates a virtual device  Sends touch events to Ubuntu  Kernel communicates with other applications

10. 10 Electrical and Computer Engineering Graphical User Interface  User friendly interface  Buttons to perform various functions

11. 11 Electrical and Computer Engineering Speed of Image Processing  Average delay of 59.946 milliseconds  Average rate of 17.56 frames per second

12. 12 Electrical and Computer Engineering Cost to build L3PT  Laser pointers = $12.00 x 2 = $24.00  Camera = $30.00  IR Longpass Filter = $12.00  Pico Projector = $135.00  Physical assembly = $25.00 Total: $226.00

13. 13 Electrical and Computer Engineering Team Roles  Brian Team lead / webmaster Integrating multitouch capabilities  Greg Image processing Screen calibration  Nick Linux driver GUI  Dmitry Camera and light filtering Multi-disciplinary research

14. 14 Electrical and Computer Engineering Questions / DEMO