Electrical and Computer Engineer
Large Portable Projected PeripheralTouchscreen
Team JacksonBrian Gosselin Jr.
Greg LangloisNick Jacek
Dmitry Kovalenkov
L3PT
Comprehensive Design Review
2Electrical and Computer Engineering
L3PT Overview
Turns PC with Win 7 into an interactive touchscreen
Projects computer screen onto a flat surface
IR emitted blob detected by camera
Combines the positive attributes of tablets and smartboards
4Electrical and Computer Engineering
At MDR…
Accomplishments IR emitting pen IR longpass filtered
camera Pico projector Image processing
algorithms
Action Items Win 7 driver System calibration Physical Assembly
5Electrical and Computer Engineering
Image Processing
Using OpenCV methods
Identifies a IR blob from the pen
Maps blob location to corresponding PC coordinates
7Electrical and Computer Engineering
Communicating with mouse
Windows 7 libraries Left click Double click Click and drag
8Electrical and Computer Engineering
Calibration
Touch four corners of projected screen
Only process set rectangular area
Use corners for higher accuracy
Will compensate for distortion
9Electrical and Computer Engineering
Physical Assembly
Telescoping tripod stand
Adjustment for wall or table projection
Portable
10Electrical and Computer Engineering
What’s Next?
Multitouch gestures Improve calibration Finalize physical
assembly Improve pen design Optimize code to
minimize delay User interface
11Electrical and Computer Engineering
Multitouch Gestures
Microsoft Developer Network (MSDN) provides libraries for communicating with Windows 7
Possible Gestures• Zoom • Pan• Rotate• Tap• Press and tap
12Electrical and Computer Engineering
Improved Pen Design
Flush mounted push button Enclosed battery More compact
13Electrical and Computer Engineering
User Interface
Designed for easy use Calibration option Start and stop detection