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Spatial Memory and Map Navigation Performance on Projector Phones with Peephole Interaction

Smartphones are useful personal assistants and omnipresent communication devices. However, collaboration is not among their strengths. With the advent of embedded projectors this might change. In our study we could show that spatial memory performance among users and observers can be improved by using a projector phone with a peephole interface instead of a smartphone with its touchscreen interface. Indeed, users performed map navigation equally well on both interfaces, although they never used a projector phone with peephole interaction before.


This work has been presented and published at the SIGCHI Conference on Human Factors in Computing Systems (CHI’13) in Paris, France in 2013. (Authors: Bonifaz Kaufmann and David Ahlström)



AD-Binning: Leveraging Around-Device Space for Storing, Browsing and Retrieving Mobile Device Content

Exploring information content on mobile devices can be tedious and time consuming. We present Around-Device Binning, or AD-Binning, a novel mobile user interface that allows users to off-load mobile content in the space around the device. In a task requiring exploration, we find that AD-Binning improves browsing efficiency by avoiding the minute selection and flicking mechanisms needed for on-screen interaction.


This work has been presented and published at the SIGCHI Conference on Human Factors in Computing Systems (CHI’13) in Paris, France in 2013. (Authors: Khalad Hasan, David Ahlström, and Pourang Irani)



3MF - A Service-Oriented Mobile Multimodal Interaction Framework

Demo 1 (Video) : MultiAirCam



Demo 2 (Video): AirDraw



Demo 3 (Video): ScreenForward


3MF is a service-oriented framework for mobile multi modal interaction. The 3MF framework simplifies device discovery and interaction data exchange among various devices and platforms like computers, tablets or smart phones. The main goal of 3MF is the abstraction and simplification of these tasks, by using standardized and interoperable technologies. 3MF aims to help researchers and developers to create applications in the distributed interactive systems domain, abstracting peer-to-peer discovery, connectivity, data serialization, and network protocols.


We created a few 3MF-based demo applications to showcase the capabilities of the framework and to provide easy-to-understand sources for developers wanting to start using 3MF. The framework, documentation the sources can be found under the 3MF website.


A preliminary description of the 3MF approach has been published at ACM Advanced Visual Interfaces International Working Conference (AVI'12) in Capri, Italy in 2012. (Authors: Bonifaz Kaufmann, Martin Gratzer, and Martin Hitz)



XL-Workspaces for Projector Phones

In peephole interaction a window to a virtual workspace is moved in space to reveal additional content. It is a promising interaction technique for mobile projector phones to display large workspaces which contain more information than can be appropriately displayed on a small smartphone screen. We developed a projector phone prototype that implements peephole pointing without instrumenting the environment or using any additional hardware besides a smartphone and a handheld projector. This device allows for the first time to perform peephole interaction in the wild. In addition, we have built a brainstorming and a drawing application to exploit and investigate the full potential of peephole interaction with projector phones.


This work has been demonstrated at ACM Multimedia in Nara, Japan and at the Mensch & Computer in Konstanz, Germany, both in 2012. (Authors: Bonifaz Kaufmann and Martin Hitz)



Target Acquisition through Peephole Interaction

In 2011, we conducted a user study in order to validate previously proposed models for target acquisition through peephole pointing with a handheld projector. In addition, we explored which human factors are involved in peephole interaction when using a handheld projector.


The results of our study have been presented at the ACM SIGCHI International Conference on Human-Computer Interaction with Mobile Devices and Services in San Francisco, CA, USA in 2012. (Authors: Bonifaz Kaufmann and David Ahlström)


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