Tele immersion
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Tele immersion

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Tele immersion is a emerging technology. Download complete pptx.

Tele immersion is a emerging technology. Download complete pptx.

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Tele immersion Tele immersion Presentation Transcript

  • Tele-immersion
    Presented by:
    Himanshu Sharma
    1207185
  • Contents
    Introduction
    History
    Tele-conferencing vs. Tele-immersion
    Working
    Applications
    Challenges
  • Introduction
    Tele-immersion is an emerging technology that will enable users at geographically distributed sites to collaborate in real time in a shared, simulated environment as if they are in the same physical room.
    This is achieved through realistic reconstruction of the scenes in virtual space.
  • History
    The idea of Tele-immersion was proposed by Jaron Lanier , the head of Advanced Networks and Services in 1997. National Tele-Immersion Initiative (NTII) was formed to implement this.
    In May 2000, researchers at University of North Carolina (UNC), the University of Pennsylvania and Advanced Networks and Services developed this technology.
    A user sitting in office at UNC was able to see lifelike 3D images of his colleagues hundreds of mile away.
  • Artistic expression as proposed by Jaron in 1997
  • Tele-conference vs. Tele-immersion
    Tele-immersion differs significantly from conventional video Tele-conferencing in that the user’s view of the remote environment changes dynamically as he moves his head.
    Tele-conferencing
    Tele-immersion
  • WORKING
  • Immersive Virtual Environment
    Audio Synthesizer
    User
    Environment
    head-
    mounted
    display
    or
    projection
    display
    system
    Virtual
    Environment
    Generator
    Audio Localizer
    commands
    Speech
    Recognizer
    Display
    Electronics
    graphics
    eye position
    Head/Eye/Hand
    Tracking
    Electronics
    head position
    hand position
    Haptic/Tactile
    kinaesthetics
    system
  • 2D to 3D…
  • Image Acquisition
    • Bank of digital cameras capture participants from a variety of angels.
    • There are about 7-15 cameras clusters each contain 4 cameras out of which 3 are black and white and one is color.
    • B&W cameras are for stereo construction .
    • The color camera is for extracting the appearance.
    A camera cluster of 3 BW and 1 color cameras
  • Camera clusters
  • Each camera is synchronized to other camera.
    Each camera is connected to workstation.
  • 3D Construction
    computation
  • This reconstruction uses Trinocular Stereo Algorithm.
    After constructing the disparity map, apply median filtering to remove a few outliers in the disparity map.
    Then the median filtered disparity map is combined with a registered color texture to reconstruct a 3D point cloud.
  • 3D Video Transmission
    3D data is transmitted in compressed form using Modern Driven compression algorithm.
    System which generates 640x480 pixel depth color maps from 10 camera clusters in a rate of 15 frames per second (fps), requires 220 mbps bandwidth.
    Around 1.2 gbps is necessary for high quality effect.
  • Applications
    Remote medical training and diagnosis.
  • Automobile engineering.
  • Remote and distributed education.
    Virtual travel and tourism.
    Art and Entertainment.
  • Challenges
    Quality of transmitting multimedia and Tele-immersion data streams over the internet is affected by high packets loss rates.
    Expensive
    High bandwidth requirement.
  • Thank you
    Queries??