Quote " Detecting multiple finger touches on a rear-projection surface.
We introduce a simple technique that enables robust multi-touch sensing at a minimum of engineering effort and expense. It relies on frustrated total internal reflection (FTIR), a technique familiar to the biometrics community where it is used for fingerprint image acquisition. It acquires true touch information at high spatial and temporal resolutions, and is scalable to very large installations.
Han, J. Y. 2005. Low-Cost Multi-Touch Sensing through Frustrated Total Internal Reflection. In Proceedings of the 18th Annual ACM Symposium on User Interface Software and Technology "
This video is really interesting and I hope you've enjoyed all this multi touch screen technology information. As Jeff Han mentionned, the multi touch screen technology is based on FTIR, and the biometrics community where it is used for fingerprint image acquisition. That would be interesting to research.
biometrics technology and fingerprint image acquisition