MultiTouch LightBox

LightBox

This proof of concept of the multi touch system not using IR technology and using the human eye viable spectrum 400nm-700mn. shadows from light(s) within the box will be capture on the 'glass surface' via the web cam. The Surface will need to use a diffuser with the correct oipacness to allow object (like fingers) to be recognized. This information will be process by a computer to do cool things. Phase 1:  Research Gather Supplies needed  Items needed    cost  comments  2 usb webcams   $10 found on woot  2 Glass/plexi       $8 got from hardware store  2 Boxes              free have them  Diffuser              free bought from hobbie lobbie  Projector             N/A don't need  IR gear             N/A don't need Phase 2  Design/Build Phase 3  Test Hardware/Software Setup web cams are installed and have been calibrated (aligned and focused) Software Calibration done (tbeta) Phase 4  Develop Software Successfully ran Photo Demo software    Phase 5  Review Improvements for next version Pros Cheap to make Simple to make Would be easy to do large scale Cons exterior shadows cause slight problems with touch recognition exterior lights need be off (lights cause shadows) not very reliable as far as accuracy or consistent results No good way to read QR codes No good way to No or very little difference between hovering and touching surface Improvement to current design Exterior lights, learned that over head lights need to be off for this to work better might be hard integrate display into the surface (using interior light as backlight, but visable light might make it hard to tell what are figers and what is the display)