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Sven Gehring, Sebastian Boring, Alexander Wiethoff
Multi-User Painting on Media Facades through Live-Video on Mobile Devices
In Extended Abstracts of the 29th ACM International Conference on Human Factors in Computing Systems - CHI 2011, Vancouver, BC, Canada, May 2011 ISBN: 978-1-4503-0228-9 (bib)

Media facades in urban spaces offer great potential for new forms of collaborative multi-user interaction. We present a way to directly interact with facades at-a-distance through live video on mobile devices. We extend the Touch Projector interface to accommodate multiple users by showing individual content on the mobile display that would otherwise clutter the facade's canvas or distract other users. To demonstrate our concept, we built an application that allows for simultaneous painting on a facade. We gathered informal feedback during the ARS Electronica Festival in Linz, Austria and found that our interaction technique is (1) considered easy-to-learn, but (2) may leave users unaware of the actions of others on the same canvas.