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

3Electrical and Computer Engineering

System Block Diagram

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

6Electrical and Computer Engineering

Speed of Image Processing

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

14Electrical and Computer Engineering

Conclusion

Significant progress since MDR Major components working Well on track to finish by FRP

DEMO - Solitaire