IR-driven, webcam enabled touch screen

This builds on my first IR experiment with TouchLib and adds a projector and acrylic screen for rear-projection capabilities.

Category:

Science & Technology

Tags:

• QuickCam
• touchlib
• touchscreen
• touch
• screen
• webcam
• Logitech

[rashidme]

Hey, how do you track the infrared? what programming language are you using? thanks.

[rickmellor]

@rashidme I built this using the demos from TouchLib.

[cybraxcyberspace]

im confused the camera captures your location and a program produces here a visual pattern?

[YambamYambam2]

i think know how to do it, yesterday i wanted a webcam and i think this was the same idea i though yesterday

[rickmellor]

This idea made it around the Internet last year and I wanted to improve on it a bit so I built it as a rear projection screen.

[rickmellor]

That's right. We used the infrared from the remote so that you won't see it with your eye. The webcam can see IR below the 680 nanometer wavelength so it picks it up (try pointing a remote at your webcam to see it). The computer then tracks the IR light from the remote, converts it to coordinates and then renders the visual that is projected to the plastic screen.

[sammy68291]

cool

[migero2]

looks like it lags bad

[td84]

Very cool.

Hypothetically, how big of an image could the webcam read?

Thanks!

[rashidme]

@rickmellor I am kinda doing the same project, but i am using a grid of infrared sensors. One row on x-axis and another on y-axis. The intersection of infrared rays would determine where the user's finger is. I am using a hollow frame, but the problem is in projecting the screen. Do you have any suggestions.

And what kind of sensors you have on top of the monitor?

thanks.

[rickmellor]

Amsterdam by Peter, Bjorn and John.