Occlusion in Collaborative Augmented Environments

Information

  • Publication Type: Technical Report
  • Workgroup(s)/Project(s): not specified
  • Date: December 1998
  • Number: TR-186-2-98-29
  • Keywords: occlusion, augmented reality, virtual reality

Abstract

Augmented environments superimpose computer enhancements on the real world. Such augmented environments are well suited for collaboration of multiple users. To improve the quality and consistency of the augmentation the occlusion of real objects by computer-generated objects and vice versa has to be implemented. We present methods how this can be done for a tracked user's body and other real objects and how irritating artifacts due to misalignments can be reduced. Our method is based on simulating the occlusion of virtual objects by a representation of the user modeled as kinematic chains of articulated solids. Registration and modeling errors of this model are being reduced by smoothing the border between virtual world and occluding real object. An implementation in our augmented environment and the resulting improvements are presented.

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BibTeX

@techreport{Fuhrmann-1998-Occ,
  title =      "Occlusion in Collaborative Augmented Environments",
  author =     "Anton Fuhrmann and Gerd Hesina and Francois Faure and
               Michael Gervautz",
  year =       "1998",
  abstract =   "Augmented environments superimpose computer enhancements on
               the real world. Such augmented environments are well suited
               for collaboration of multiple users. To improve the quality
               and consistency of the augmentation the occlusion of real
               objects by computer-generated objects and vice versa has to
               be implemented. We present methods how this can be done for
               a tracked user's body and other real objects and how
               irritating artifacts due to misalignments can be reduced.
               Our method is based on simulating the occlusion of virtual
               objects by a representation of the user modeled as kinematic
               chains of articulated solids. Registration and modeling
               errors of this model are being reduced by smoothing the
               border between virtual world and occluding real object. An
               implementation in our augmented environment and the
               resulting improvements are presented.",
  month =      dec,
  number =     "TR-186-2-98-29",
  address =    "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria",
  institution = "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology ",
  note =       "human contact: technical-report@cg.tuwien.ac.at",
  keywords =   "occlusion, augmented reality, virtual reality",
  URL =        "/research/publications/1998/Fuhrmann-1998-Occ/",
}