How to Make a Cheap Multitouch Pad - MTmini

Posted By: BlackTiger | Dec 31st, 2008 @ 2:47 AM
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#Dec 31st, 2008 @ 2:47 AM
BlackTiger
BlackTiger
If you stumbled and fell down, it doesn't mean yet, that you're going in the wrong direction.

 
Amazing!...
#Dec 31st, 2008 @ 2:59 AM
Bas
Bas
It finds lightbulbs.
Fun, but since you can't see where you're touching, application is limited. Now all we need is cheap, small picoprojectors that you can use to project your desktop on the underside of that tracking paper. Voila, cardboard Surface machine.

The trick is getting both the webcam and the projector in the center. Maybe you can tape a short throw projector to the side. The camera would also probably need to grab infrared images so that it doesn't get confused by the projected desktop. on the underside of the paper, and can still see your fingers.
#Dec 31st, 2008 @ 9:57 AM
GoddersUK
GoddersUK
I CAN has cheezburger and you CAN'T has stop me!
Cool! Big Smile
#Dec 31st, 2008 @ 1:23 PM
rhm
rhm

Yeh, there's plenty of information on how the Surface works. It does use an IR lightsource and IR filtered cameras so as no to interfere with the projector and to not be confused by the projector's output or ambient lighting. The other key design detail is that it uses 4 cameras. That has two advantages, one is a higher-resolution image to process. Seconds is that it means that cameras can be in different places to the projector and still point straight up.

Other than that it's just a software problem - turn the images into a collection of touches (while filtering out palms, static objects and fast-moving reflections) and then recognising gestures from those touches.

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