Christian Lander

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Mobile phones have evolved significantly in recent years from single-purpose communication devices to multi-purpose computing devices. Despite this evolution, the interaction model for how incoming calls are handled has barely changed. Current-generation smartphones still use abrupt full-screen notifications to alert users to incoming calls, demanding a(More)
Mobile gaze-based interaction with multiple displays may occur from arbitrary positions and orientations. However, maintaining high gaze estimation accuracy in such situa-tions remains a significant challenge. In this paper, we present GazeProjector, a system that combines (1) natural feature tracking on displays to determine the mobile eye tracker's(More)
Mobile phones became multi-purpose devices supporting their users with large variety of applications for various tasks. Not only the number of available applications is increasing, also the number of applications people are using on their devices is growing, as well as the amount of time people spent on their smartphones daily is getting bigger. In this(More)
Digital content, like news presented on screens at public places (e.g., subway stations) is pervasive. Usually it is not possible for passers-by to conveniently interact with such public displays, as content is not interactive or responsive. Especially news screens are normally showing one news article after another, reducing the amount of information(More)
We present ClothLens, a prototype that allows simultaneous interaction of multiple users with a digital map shown on a tabletop display. With our prototype interaction with the content by panning or zooming reduces the conflicts due to interferences. ClothLens utilizes the Focus+Context pattern enabling users to create personal lenses on top of the map. The(More)
The increasing number of media façades in urban spaces offers great potential for interaction. Due to their size and physical properties interacting with them directly by touching them is not possible. In this paper, we present a sensor-based approach, which relies on the GPS, compass and accelerometer data of a mobile device to control a pointer on(More)
The human's visual attention focus usually reflects the activity and environment engaged in or simply his context in the most coherent way. The cornea, which is encasing the iris and pupil, is protected by tear fluid, and thus is a highly reflective surface. Our eyes show a reflection of what we see in our current context. We present an attempt of using(More)
The focus of the human visual attention often reflects his activity and environment -- or his context -- in the most coherent way. Our eyes literally reflect our daily life. The cornea, which is encasing the iris and pupil, is protected by tear fluid, and thus is a highly reflective surface. In this paper we present a first exploration of using corneal(More)
While it has been well established that incorporating landmarks into route descriptions enhances understanding and performance of wayfinding, only a very few available systems make use of them. This is primarily due to the fact that landmark data is often not available, and the creation of the data is connected to tedious manual labor. Prior work explored(More)