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L3PT

L3PT. Large Portable Projected Peripheral Touchscreen Team Jackson Brian Gosselin Jr. Greg Langlois Nick Jacek Dmitry Kovalenkov. Final Project Review. L3PT Overview. Peripheral for interacting with a computer Projects an interactive screen on wall or table

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L3PT

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

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

  3. System Block Diagram

  4. Accomplishments • Physical assembly • Image processing • Calibration • Multitouch capabilities • Linux Driver • Graphical user interface

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

  6. 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. Physical Assembly • Portable • Large workspace • Telescoping rod for adjusting screen size • Adjustment for wall or table projection

  8. 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. Linux Driver • Use uinput system • Creates a virtual device • Sends touch events to Ubuntu • Kernel communicates with other applications

  10. Graphical User Interface • User friendly interface • Buttons to perform various functions

  11. Average delay of 59.946 milliseconds Average rate of 17.56 frames per second Speed of Image Processing

  12. 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. 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. Questions / DEMO

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