References of "Broll, Wolfgang"
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See detailThe final TimeWarp: using form and content to support player experience and presence when designing location-aware mobile augmented reality games
Blum, Lisa; Wetzel, Richard; McCall, Roderick UL et al

in DIS '12 Proceedings of the Designing Interactive Systems Conference (2012)

Designing Augmented Reality location aware games requires an understanding of how form and content issues impact on presence. A study of 60 players was conducted using questionnaires, video analysis and ... [more ▼]

Designing Augmented Reality location aware games requires an understanding of how form and content issues impact on presence. A study of 60 players was conducted using questionnaires, video analysis and interviews. The results indicate that content including: moral dilemmas, strong narratives, using real locations effectively and applying simple physical behavior within virtual characters to improve embodiment have a positive impact on player experience. The results are presented in the form of guidelines. [less ▲]

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See detailLightweight palm and finger tracking for real-time 3D gesture control
Hackenberg, Georg; McCall, Roderick UL; Broll, Wolfgang

in IEEE Conference on Virtual Reality 2011 (2011)

We present a novel technique implementing barehanded interaction with virtual 3D content by employing a time-of-flight camera. The system improves on existing 3D multi-touch systems by working regardless ... [more ▼]

We present a novel technique implementing barehanded interaction with virtual 3D content by employing a time-of-flight camera. The system improves on existing 3D multi-touch systems by working regardless of lighting conditions and supplying a working volume large enough for multiple users. Previous systems were limited either by environmental requirements, working volume, or computational resources necessary for realtime operation. By employing a time-of-flight camera, the system is capable of reliably recognizing gestures at the finger level in real-time at more than 50 fps with commodity computer hardware using our newly developed precision hand and finger-tracking algorithm. Building on this algorithm, the system performs gesture recognition with simple constraint modeling over statistical aggregations of the hand appearances in a working volume of more than 8 cubic meters. Two iterations of user tests were performed on a prototype system, demonstrating the feasibility and usability of the approach as well as providing first insights regarding the acceptance of true barehanded touch-based 3D interaction. [less ▲]

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See detailMulti-dimensional Interactive City Exploration through Mixed Reality
Herbst, Iris; Braun, Anne-Kathrine; McCall, Roderick UL et al

in Multi-dimensional Interactive City Exploration through Mixed Reality (2008, March)

In this paper we present a pervasive outdoor mixed reality edutainment game for exploring the history of a city in the spatial and the temporal dimension, which will closely couple the real environment ... [more ▼]

In this paper we present a pervasive outdoor mixed reality edutainment game for exploring the history of a city in the spatial and the temporal dimension, which will closely couple the real environment with the virtual content. The game provides a new and unique user experience, which links rich interactive content to time and places. We introduce the development of such a game, including a universal mechanism to define and setup multi-modal user interfaces for game challenges. [less ▲]

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See detailTimeWarp: Interactive Time Travel with a Mobile Mixed Reality Game
Herbst, Iris; Braun, Anne-Kathrine; McCall, Roderick UL et al

in In the Proceedings of MobileHCI 2008, Amsterdam, Netherlands (2008)

Mobile location-aware applications have become quite popular across a range of new areas such as pervasive games and mobile edutainment applications. However it is only recently, that approaches have been ... [more ▼]

Mobile location-aware applications have become quite popular across a range of new areas such as pervasive games and mobile edutainment applications. However it is only recently, that approaches have been presented which combine gaming and education with mobile Augmented Reality systems. However they typically lack a close crossmedia integration of the surroundings, and often annotate or extend the environment rather than modifying and altering it. In this paper we present a mobile outdoor mixed reality game for exploring the history of a city in the spatial and the temporal dimension. We introduce the design and concept of the game and present a universal mechanism to define and setup multi-modal user interfaces for the game challenges. Finally we discuss the results of the user tests. [less ▲]

Detailed reference viewed: 138 (2 UL)