Building Interactive Multi-touch Surfaces.

Johannes Schöning, Jonathan Hook, Tom Bartindale, Dominik Schmidt, Patrick Olivier, Florian Echtler, Nima Motamedi, Peter Brandl, Ulrich von Zadow

In: Christian Müller-Tomfeld . Tabletops - Horizontal Interactive Displays. Kapitel 1 Springer 2010.


Multi-touch interaction with computationally enhanced surfaces has re- ceived considerable attention in recent years. Hardware implementations of multi- touch interaction such as Frustrated Total Internal Reflection (FTIR) and Diffused Illumination (DI) have allowed for the low cost development of surfaces. Although many of these technologies and associated applications have been presented in aca- demic settings, the practicalities of building a high quality multi-touch enabled sur- face, both in terms of the software and hardware required, are not widely known. We draw upon our extensive experience as developers of multi-touch technology to provide practical advice in relation to building, and deploying applications upon, multi-touch surfaces. This includes technical details of the construction of optical multi-touch surfaces, including: infrared illumination, silicone compliant surfaces, projection screens, cameras, filters, and projectors, and an overview of existing soft- ware libraries for tracking.

Deutsches Forschungszentrum für Künstliche Intelligenz
German Research Center for Artificial Intelligence