@unpublished{ZollmannBimber2007,
  author    = {Zollmann, Stefanie and Bimber, Oliver},
  title     = {Imperceptible Calibration for Radiometric Compensation},
  doi       = {10.25643/bauhaus-universitaet.809},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-8094},
  year      = {2007},
  abstract  = {We present a novel multi-step technique for imperceptible geometry and radiometry calibration of projector-camera systems. Our approach can be used to display geometry and color corrected images on non-optimized surfaces at interactive rates while simultaneously performing a series of invisible structured light projections during runtime. It supports disjoint projector-camera configurations, fast and progressive improvements, as well as real-time correction rates of arbitrary graphical content. The calibration is automatically triggered when mis-registrations between camera, projector and surface are detected.},
  subject      = {Association for Computing Machinery / Special Interest Group on Graphics},
  language  = {en}
}
@unpublished{LanglotzBimber2007,
  author    = {Langlotz, Tobias and Bimber, Oliver},
  title     = {Unsynchronized 4D Barcodes},
  doi       = {10.25643/bauhaus-universitaet.853},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-8531},
  year      = {2007},
  abstract  = {We present a novel technique for optical data transfer between public displays and mobile devices based on unsynchronized 4D barcodes. We assume that no direct (electromagnetic or other) connection between the devices can exist. Time-multiplexed, 2D color barcodes are displayed on screens and recorded with camera equipped mobile phones. This allows to transmit information optically between both devices. Our approach maximizes the data throughput and the robustness of the barcode recognition, while no immediate synchronization exists. Although the transfer rate is much smaller than it can be achieved with electromagnetic techniques (e.g., Bluetooth or WiFi), we envision to apply such a technique wherever no direct connection is available. 4D barcodes can, for instance, be integrated into public web-pages, movie sequences or advertisement presentations, and they encode and transmit more information than possible with single 2D or 3D barcodes.},
  subject      = {Maschinelles Sehen},
  language  = {en}
}