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- Bentley, F, et al.
(författare)
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Perceptive presence
- 2003
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Ingår i: IEEE Computer Graphics and Applications. - 0272-1716 .- 1558-1756. ; 23, s. 26-36
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Tidskriftsartikel (refereegranskat)abstract
- Perceptive presence systems automatically convey awareness of user states to a remote location or application without the user having to perform explicit commands or mode selection. The article describes a component-based architecture for creating presence applications using perceptual user interface widgets. Each widget performs a machine perception function, such as tracking a face or monitoring activity in a specific 3D location. Widgets provide an abstraction barrier between the perception algorithms and the needs of application writers. Two example applications developed using this framework are presented: one uses a luminous display to express a user’s availability for communication to a colleague at a remote location, and a second uses activity to control devices in a context-aware environment.
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- Demirdjian, D, et al.
(författare)
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Activity maps for location-aware computing
- 2002
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Ingår i: SIXTH IEEE WORKSHOP ON APPLICATIONS OF COMPUTER VISION, PROCEEDINGS. ; , s. 70-75
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Konferensbidrag (refereegranskat)abstract
- Location-based context is important for many applications. Previous systems offered only coarse room-level features or used manually specified room regions to determine fine-scale features. We propose a location context mechanism based on activity maps, which define regions of similar context based on. observations of 3-D patterns of location and motion in an environment. We describe an algorithm for obtaining activity maps using the spatio-temporal clustering of visual tracking data. We show how the recovered maps correspond to regions for common tasks in the environment and describe their use in some applications.
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| 3. |
- Koile, K, et al.
(författare)
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Activity zones for context-aware computing
- 2003
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Ingår i: UBICOMP 2003. ; , s. 90-106
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Konferensbidrag (refereegranskat)abstract
- Location is a primary cue in many context-aware computing systems, and is often represented as a global coordinate, room number, or a set of Euclidean distances to various landmarks. A user’s concept of location, however, is often defined in terms of regions in which similar activities occur. We discuss the concept of such regions, which we call activity zones, and suggest that such zones can be used to trigger application actions, retrieve information based on previous context, and present information to users. We show how to semi-automatically partition a space into activity zones based on patterns of observed user location and motion. We describe our system and two implemented example applications whose behavior is controlled by users’ entry, exit, and presence in the zones.
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| 10. |
- Tollmar, Konrad, et al.
(författare)
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Gesture + Play Exploring Full-Body Navigation for Virtual Environments
- 2003
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Ingår i: Computer Vision and Pattern Recognition Workshop, 2003. CVPRW ’03. Conference on.
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Konferensbidrag (refereegranskat)abstract
- Navigating virtual environments usually requires a wired interface, game console, or keyboard. The advent of perceptual interface techniques allows a new option: the passive and untethered sensing of users’ pose and gesture to allow them maneuver through and manipulate virtual worlds. We describe new algorithms for interacting with 3-D environments using real-time articulated body tracking with standard cameras and personal computers. Our method is based on rigid stereo-motion estimation algorithms and uses a linear technique for enforcing articulation constraints. With our tracking system users can navigate virtual environments using 3-D gesture and body poses. We analyze the space of possible perceptual interface abstractions for full-body navigation, and present a prototype system based on these results. We finally describe an initial evaluation of our prototype system with users guiding avatars through a series of 3-D virtual game worlds.
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| 11. |
- Tollmar, Konrad, et al.
(författare)
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VideoCafe - exploring mediaspaces in public places within organizations
- 2001
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Ingår i: Behavior and Information Technology. - : Informa UK Limited. - 0144-929X .- 1362-3001. ; 20, s. 101-110
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Tidskriftsartikel (refereegranskat)abstract
- This paper describes our studies of mediaspaces which are embedded within public places in organizations so as to examine the hypothesis that individuals might benefit even when working apart - from opportunities for light informal interaction. A set of full-scale prototypes were used and assessed over extensive periods of time. The informal observations and reflection in design of these places have been supplemented by formal studies. We found that great care needs to be taken when designing these places from an architectural point of view. For some of the places, we would like to suggest using architectural features when altering the room rather than technology. In other settings, the artful deployment of communication media might be more effective.
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