Tele immersion


Published on

Tele immersion is a emerging technology. Download complete pptx.

Published in: Technology
1 Comment
  • how cud i download it?
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Tele immersion

  1. 1. Tele-immersion<br />Presented by:<br />Himanshu Sharma<br />1207185<br />
  2. 2. Contents<br />Introduction<br />History<br />Tele-conferencing vs. Tele-immersion <br />Working<br />Applications<br />Challenges<br />
  3. 3. Introduction<br />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. <br />This is achieved through realistic reconstruction of the scenes in virtual space.<br />
  4. 4.
  5. 5. History<br />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.<br />In May 2000, researchers at University of North Carolina (UNC), the University of Pennsylvania and Advanced Networks and Services developed this technology.<br />A user sitting in office at UNC was able to see lifelike 3D images of his colleagues hundreds of mile away.<br />
  6. 6. Artistic expression as proposed by Jaron in 1997<br />
  7. 7. Tele-conference vs. Tele-immersion<br /> 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.<br />Tele-conferencing<br />Tele-immersion<br />
  8. 8. WORKING<br />
  9. 9. Immersive Virtual Environment<br />Audio Synthesizer<br />User<br />Environment<br />head-<br />mounted<br />display <br />or<br />projection<br />display<br />system<br />Virtual<br />Environment<br />Generator<br />Audio Localizer<br />commands<br />Speech<br />Recognizer<br />Display<br />Electronics<br />graphics<br />eye position<br />Head/Eye/Hand<br />Tracking<br />Electronics<br />head position<br />hand position<br />Haptic/Tactile<br />kinaesthetics<br />system<br />
  10. 10. 2D to 3D…<br />
  11. 11. Image Acquisition<br /><ul><li> Bank of digital cameras capture participants from a variety of angels.
  12. 12. There are about 7-15 cameras clusters each contain 4 cameras out of which 3 are black and white and one is color.
  13. 13. B&W cameras are for stereo construction .
  14. 14. The color camera is for extracting the appearance. </li></ul>A camera cluster of 3 BW and 1 color cameras<br />
  15. 15. Camera clusters<br />
  16. 16. Each camera is synchronized to other camera.<br />Each camera is connected to workstation.<br />
  17. 17. 3D Construction<br />computation<br />
  18. 18. This reconstruction uses Trinocular Stereo Algorithm. <br />After constructing the disparity map, apply median filtering to remove a few outliers in the disparity map.<br />Then the median filtered disparity map is combined with a registered color texture to reconstruct a 3D point cloud.<br />
  19. 19. 3D Video Transmission <br />3D data is transmitted in compressed form using Modern Driven compression algorithm.<br />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.<br />Around 1.2 gbps is necessary for high quality effect.<br />
  20. 20. Applications<br />Remote medical training and diagnosis. <br />
  21. 21. Automobile engineering.<br />
  22. 22. Remote and distributed education.<br />Virtual travel and tourism.<br />Art and Entertainment.<br />
  23. 23. Challenges<br />Quality of transmitting multimedia and Tele-immersion data streams over the internet is affected by high packets loss rates.<br />Expensive<br />High bandwidth requirement.<br />
  24. 24. Thank you<br />Queries??<br />