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  • Report (2)
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  • Bimber, Oliver (3)
  • Häntsch, Ferry (3)
  • Grundhöfer, Anselm (2)
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  • Augmented Reality (3) (remove)

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Laser Pointer Tracking in Projector-Augmented Architectural Environments (2007)
Kurz, Daniel ; Häntsch, Ferry ; Grosse, Max ; Schiewe, Alexander ; Bimber, Oliver
We present a system that applies a custom-built pan-tilt-zoom camera for laser-pointer tracking in arbitrary real environments. Once placed in a building environment, it carries out a fully automatic self-registration, registrations of projectors, and sampling of surface parameters, such as geometry and reflectivity. After these steps, it can be used for tracking a laser spot on the surface as well as an LED marker in 3D space, using inter-playing fisheye context and controllable detail cameras. The captured surface information can be used for masking out areas that are critical to laser-pointer tracking, and for guiding geometric and radiometric image correction techniques that enable a projector-based augmentation on arbitrary surfaces. We describe a distributed software framework that couples laser-pointer tracking for interaction, projector-based AR as well as video see-through AR for visualizations with the domain specific functionality of existing desktop tools for architectural planning, simulation and building surveying.
Coded Projection and Illumination for Television Studios (2007)
Grundhöfer, Anselm ; Seeger, Manja ; Häntsch, Ferry ; Bimber, Oliver
We propose the application of temporally and spatially coded projection and illumination in modern television studios. In our vision, this supports ad-hoc re-illumination, automatic keying, unconstrained presentation of moderation information, camera-tracking, and scene acquisition. In this paper we show how a new adaptive imperceptible pattern projection that considers parameters of human visual perception, linked with real-time difference keying enables an in-shot optical tracking using a novel dynamic multi-resolution marker technique
Dynamic Adaptation of Projected Imperceptible Codes (2007)
Grundhöfer, Anselm ; Seeger, Manja ; Häntsch, Ferry ; Bimber, Oliver
In this paper we present a novel adaptive imperceptible pattern projection technique that considers parameters of human visual perception. A coded image that is invisible for human observers is temporally integrated into the projected image, but can be reconstructed by a synchronized camera. The embedded code is dynamically adjusted on the fly to guarantee its non-perceivability and to adapt it to the current camera pose. Linked with real-time flash keying, for instance, this enables in-shot optical tracking using a dynamic multi-resolution marker technique. A sample prototype is realized that demonstrates the application of our method in the context of augmentations in television studios.
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