Omnidirectional system for meeting recordings.

	      Igor Potucek

Department of Computer Graphics and Multimedia
    Faculty of Information Technology
      Brno University of Technology


Abstract:
The traditional approach for recording of the meetings uses several video
cameras mounted on the walls. The omnidirectional system with hyperbolic
mirror and HDTV camera is used in our case. The acquired data need to be
presented to the human in the appropriate manner, however, not in the
"deformed" form obtained through the mirror. Some techniques to trasnsform
omnidirectional image into suitable form will be presented. The
transformed output is then used for recognition of the participants
activity. Omni-directional system consisting of camera and mirror mounted
on mirror holder is prone to vibrations, which cause distortions in
transformed panoramic image. The solution is to detect parameters of the
mirror border in each frame. The modified edge detector for circles is
proposed.