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LightPainter3DPresenters: Jon-Paul Berexa, Sam Wyatt

Rafee Memon, Will Xia

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Light Painting

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Project ConceptAllow users to draw freehand, 3D light paintings in an easy, intuitive way.Motivation• Traditional light painting methods are

challenging and constricted to certain lighting conditions.

• Light painting could have more practical applications with additional accuracy.

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Competitive AnalysisTraditional Light Painting • Challenging

• Can’t undo mistakes• Requires decent camera and lens setup

Kinect and Wii • High start up cost• Digitally created light• Lesser degree of accuracy

3D Freehand Drawing Pen

http://blog.makezine.com/2010/08/17/3d-freehand-drawer/

• Unnatural to use• Constrained to small area

Rhonda 3D Drawing Tool

http://ndesign-studio.com/blog/rhonda-3d-drawing-tool

• Compact, Portable• Tablet-Based• Challenging to learn

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Requirements

• Needs to draw with analog light• Needs to capture a 3D position• Needs to be close to real-time• Drawing must be editable• Must feel natural and enjoyable to use• (Optional) Drawing should be rotatable• (Optional) Should work with multiple pens

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Technical Specifications• LightPen– Arduino Mini– XBee Antenna + Breakout Board– Various Sliders, Buttons, LEDs

• 2 cameras– Camera 1 will be high res– Camera 2 will be low res (only for 3D)

• XBee computer adapter• Camera/Receiver housing • User must provide a computer

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Architecture

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Risks and MitigationMotion Tracking Inaccuracy • Using custom built algorithm tailored to

track the LightPen

LightPen Battery Failure • Battery is relatively easy to change• Drawing can be stopped and continued

later

Signal Loss • Connection indicator light located on Camera Housing

Display Lags Behind Input • Resolution can be scaled based on available computing power

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Questions?