Current Projects

Prehensile Interaction

Interaction with hand gestures has been an active research area in the 3D user-interfaces field, but research from the related fields of psychology has rarely been taken into consideration when designing the hand-based interfaces. Investigations in various domains of psychology have consistently shown that the kinematics of prehension allows for predicting the object a human is going to grab and the subsequent actions on that object. This promise great opportunities for substantially improved interaction in 3D environments, provided that the hand kinematics information is extracted and incorporated in the interface... read more


In virtual environments, users' visual and auditory perception is replaced by computer-generated stimuli, thus, knowing the positions of real objects is crucial for physical safety. While some solutions exist, these are limiting the IVE design or depend on the hardware setup. Moreover, most solutions cannot handle lost tracking, erroneous tracker calibration, or moving obstacles. In this project, we develop stand-alone hardware devices to alert IVE users for potential collisions with real-world objects... read more

Real Virtual Environments

In this project we investigate the benefits and the limitations, as well as different implementation options for smooth immersion into HMD-based IVEs. We evaluate our concepts in a series of user studies, in which we have tested users' awareness, reality judgment and experience in the IVE, when using different transition techniques. Our results show that smooth transitions into the IVE improve the awareness of the user and may increase the perceived interactivity of the system... read more

Smart I/O

Complex electronic parts, such as high-speed color and depth cameras with integrated signal processing units, active touch surfaces, vibrotactile actuators, etc., have been integrated into many novel I/O devices for decades. Nevertheless, these pose a set of hard constraints for the hardware designer, especially when used in mobile devices, where power consumption, robustness and low cost are significant concerns. In this project, we investigate I/O devices and techniques from the HCI perspective and aim to determine the relevant constraints for hardware design... read more

Other Projects

Touching the Void

Recent developments in the area of touch and display technologies have suggested to combine multi-touch systems and stereoscopic visualization. Stereoscopic perception requires each eye to see a slightly different perspective of the same scene, which results in two distinct projections on the display. Thus, if the user wants to select a 3D stereoscopic object in such a setup, the question arises where she would touch the 2D surface to indicate the selection. A user may apply different strategies, for instance touching the midpoint between the two projections, or... read more

Navigation in Virtual City Models

In this project we investigate different techniques for navigation in interactive 3D environments. Geographic Information Systems (GIS) are well suited as a complex testbed for evaluation of user interfaces based on multi-modal input. Recent developments in the area of interactive surfaces enable the construction of low-cost multi-touch displays and relatively inexpensive sensor technology to detect foot gestures, which allows to explore these input modalities for virtual reality environments... read more


Traditionally, interaction techniques for virtual reality applications are implemented in a proprietary way on specific target platforms and require specific hardware, physics or rendering libraries, which hinders reusability and portability. Even though abstraction layers for hardware devices are provided by numerous virtual reality libraries, they are usually tightly bound to a particular rendering environment and hardware configuration. VINS (Virtual Interactive Namespace) is a seamless distributed memory space that supports reusable design of interactive techniques... read more