Multitouch: FTIR

Multitouch: FTIR Jason Morrison [email_address] Matthew Kampschmidt [email_address]

More Multitouch from Jeff Han
Even More Multitouch!

What is FTIR?

What is FTIR?
Frustrated Total Internal Reflection

What is FTIR?
Frustrated Total Internal Reflection
Say what, now?

http://cs.nyu.edu/~jhan/ftirsense/

… and multitouch? What’s FTIR got to do with that?

The Basic Idea
Build a table
Rear-project an image on it
Mount infrared LEDs for FTIR
Infrared camera to track fingers

http://digitalstratum.com/programming/ftir_build

Related developments
Single touch
Gesturing
More expensive multitouch
iPhone

FTIR hits a sweet spot: Cheap, large format, multi-user installations

Table Construction
Acrylic or polycarbonate
Input
Infrared LEDs
Compliant surface
Infrared camera
Output
Digital projector
Diffusal surface

Enabling Technology
Direct tactile UI
Intuitive gestures, ZUIs
Concurrent multiple users
Can be used right now! (kind of)

Areas for Development
Hardware questions
Compliant surface
LED interface optimization

Software development
Blob detection: Touchlib is good, GPGPU is better?
Libraries
Tools (VVVV, processing)
Bridges (FLOSC)
Abstractions

Gesture standards
Fingerworks http://www.fingerworks.com/userguides.html
Community http :// nuigroup.com/forums/viewthread/95/

Other interactive tables
http://www.iua.upf.es/mtg/reacTable/
http :// www.whitenoiseaudio.com/touchlib/

Questions? Jason Morrison [email_address] Matthew Kampschmidt [email_address]

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by Jason Morrison on Dec 27, 2007