@techreport{KurzHaentschGrosseetal.2007, author = {Kurz, Daniel and H{\"a}ntsch, Ferry and Grosse, Max and Schiewe, Alexander and Bimber, Oliver}, title = {Laser Pointer Tracking in Projector-Augmented Architectural Environments}, doi = {10.25643/bauhaus-universitaet.818}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-8183}, year = {2007}, abstract = {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.}, subject = {Association for Computing Machinery / Special Interest Group on Graphics}, language = {en} } @techreport{GrundhoeferSeegerHaentschetal.2007, author = {Grundh{\"o}fer, Anselm and Seeger, Manja and H{\"a}ntsch, Ferry and Bimber, Oliver}, title = {Dynamic Adaptation of Projected Imperceptible Codes}, doi = {10.25643/bauhaus-universitaet.816}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-8168}, year = {2007}, abstract = {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.}, subject = {Association for Computing Machinery / Special Interest Group on Graphics}, language = {en} }