Ce diaporama a bien été signalé.
Nous utilisons votre profil LinkedIn et vos données d’activité pour vous proposer des publicités personnalisées et pertinentes. Vous pouvez changer vos préférences de publicités à tout moment.

Virtual reality

2 942 vues

Publié le

  • Soyez le premier à commenter

  • Soyez le premier à aimer ceci

Virtual reality

  1. 1. “So a virtual reality is a synthetic sensory experience which may one day be indistinguishable from the real physical world “ - Kalawsky, R.S. (1993)
  2. 2. Introduction Virtual Reality (VR) is the illusion of a threedimensional, interactive, computer-generated reality where sight, sound, and sometimes even touch are simulated to create pictures, sounds, and objects that actually seem real.
  3. 3. HSITORY Morton Heilig
  4. 4. Ivan Sutherland
  5. 5. History of virtual reality •1980s • The term ‘virtual reality’ was created and popularized. • Company named ‘VPL Research’ launched and produced goggles and gloves. • 1990s • NASA scientist designed virtual reality system to control Mars rover from Earth.
  6. 6. What is VR? • emulating the real world • making an electronic world seem real Interactive • not static 3D images • not movies • moving within the world • manipulating objects in the world
  7. 7. Inside VR • scenes projected on walls • realistic environment • hydraulic rams! • real controls • other people
  8. 8. Tele-presence NOW
  9. 9. In the future -- Tele-presence
  10. 10. Types of VR Desktop VR • ordinary screen, mouse or keyboard control • polemous mouse, steering wheel, joystick Immersive VR • helmet/goggles, data glove • body suit, trampoline Physical world/VR mixes
  11. 11. Educational Virtual Reality AS Interactive Project
  12. 12. Hardware used in VR Input devices: A variety of input devices allow the user to navigate through a virtual environment and to interact with virtual objects. Directional sound, tactile and force feedback devices, voice recognition and other technologies are being employed to enrich the immersive experience and to create more "sensualized" interfaces.
  13. 13. Input Devices (Motion Trackers) The Motion Tracking system is based on magnetic sensors which are attached to the user. Most common are sensors measuring the intensity of a magnetic field generated at a reference point. The motion of the different segments is tracked using magnetic sensors . These sensors return raw data (e.g. positions and orientations) expressed in a single frame system..
  14. 14. Other Input Devices MIDI keyboard A MIDI keyboard controller has 88 keys, any of which can be struck within a fraction of second. Each key transmits velocity of keystroke as well as pressure after the key is pressed. Real-time video input SIRIUS® Video card from Silicon Graphics. With SIRIUS®, images are digitized at a frequency of 25 Hz (PAL) or 30 Hz (NTSC) and may be analyzed by the VR program. Real-time audio input Speech synthesis facilities are of clear utility in a VR environment especially for command feedback. Although speech synthesis software is available even at the personal computer level, some improvement is still needed, particularly in the quality of speech.
  15. 15. Output Devices Head-mounted displays (HMDs) The head-mounted display (HMD) was the first device providing its wearer with an immersive experience. A typical HMD houses two miniature display screens and an optical system that channels the images from the screens to the eyes, thereby, presenting a stereo view of a virtual world. As a result, the viewer can look around and walk through the surrounding virtual environment.
  16. 16. BOOM (Binocular Omni-Orientation Monitor) The BOOM (Binocular Omni-Orientation Monitor) from Fake space is a head-coupled stereoscopic display device. Screens and optical system are housed in a box that is attached to a multi-link arm. The user looks into the box through two holes, sees the virtual world, and can guide the box to any position within the operational volume of the device.
  17. 17. Haptic interfaces and tactile feedback for VE applications CyberGrasp
  18. 18. Architecture of VR System Input Processor, Simulation Processor, Rendering Processor and World Database. visual, auditory, haptic, touch… Position & Orientation Input Processor Rendering Processor Simulation Processor World Database 18
  19. 19. Applications Entertainment ◦ More vivid ◦ Move exciting ◦ More attractive 19
  20. 20. Insider says PlayStation 4′s virtual reality headset is going to be ‘amazing’ FEB 18, 2014 AT 11:55
  21. 21. Applications (Cont’d) Medicine Practice performing surgery. Perform surgery on a remote patient. Teach new skills in a safe, controlled environment. 21
  22. 22. Applications (Cont’d) Manufacturing ◦ Easy to modify ◦ Low cost ◦ High efficient 22
  23. 23. Applications (Cont’d) Education & Training ◦ Driving simulators. ◦ Flight simulators. ◦ Ship simulators. ◦ Tank simulators. 23
  24. 24. The Future of Virtual Reality Virtual Reality is a growing industry PC and specialized hardware are getting better, faster and cheaper because of development in VR. Maybe 3D user interfaces will replace the present computers. Huge demand for VRML programmers in near future. Revolution in gaming industries
  25. 25. Future In the past, computing power has doubled approximately every 18 months, a trend that is known as Moore’s Law. If this is the case then we should have a computer powerful enough to run immersive VR programs in our own homes by the year 2037.