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10 -virtual_reality

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10 -virtual_reality

  1. 1. Virtual Reality
  2. 2. What is Virtual Reality? <ul><li>A responsive virtual world in which the user is effectively immersed </li></ul><ul><li>Features </li></ul><ul><ul><li>Immersive </li></ul></ul><ul><ul><li>Interactive </li></ul></ul><ul><ul><li>Real time </li></ul></ul><ul><ul><li>Viewer centered </li></ul></ul>
  3. 3. Crucial Technologies <ul><li>Display system </li></ul><ul><li>Graphics rendering system </li></ul><ul><li>Tracking system </li></ul><ul><li>Virtual world construction and maintenance system </li></ul>
  4. 4. Display System <ul><li>Display technology advances very rapidly </li></ul><ul><li>VR display system must provide immersion </li></ul><ul><li>Desktop displays are not considered to be VR </li></ul><ul><ul><li>Hardly block out the real world </li></ul></ul><ul><ul><li>Do not present virtual world objects in life size </li></ul></ul><ul><ul><li>Do not create the illusion of immersion </li></ul></ul>
  5. 5. CAVE <ul><li>Cave Automatic Virtual Environment </li></ul><ul><li>An immersive virtual reality environment where projectors are directed to 3, 4, 5 or 6 of the walls of a room-sized cube </li></ul>
  6. 6. Head-Mounted Display <ul><li>Worn on the head or as part of a helmet </li></ul><ul><li>A small display optic in front of one or each eye </li></ul>
  7. 7. Panoramic Display <ul><li>Use multiply displays to provide wide view angle </li></ul><ul><li>Widely used in many applications </li></ul><ul><li>Challenge: geometry and color calibration </li></ul>
  8. 8. Tracking System <ul><li>Tracking observer’s body coordinate / head motion </li></ul><ul><li>Challenges: </li></ul><ul><ul><li>Accuracy </li></ul></ul><ul><ul><li>Ergonomics </li></ul></ul><ul><ul><li>System latency </li></ul></ul>
  9. 9. Augmented Reality <ul><li>Direct or indirect view of a physical real-world environment whose elements are augmented by virtual computer-generated sensory input </li></ul><ul><li>Enhance person’s perception of reality </li></ul>
  10. 10. Application: Wikitude <ul><li>The very first Augmented Reality Browser for smartphone-users </li></ul><ul><li>Scan surrounding using camera and device’s sensors </li></ul><ul><li>Objects’ information is displayed in the cam right where the real object is located </li></ul>
  11. 11. Mixed Reality <ul><li>Merge of real and virtual worlds to produce new environments and visualizations </li></ul><ul><li>Physical and digital objects co-exist and interact in real time </li></ul>
  12. 12. Application: Virtual therapy <ul><li>Psychologist treats soldiers with PTSD (Post Traumatic Stress Disorder) </li></ul><ul><li>PTSD: can not get over from bad things happened to him/her </li></ul><ul><li>Best way to treat PTSD: exposure therapy </li></ul><ul><ul><li>Go back to the bad thing </li></ul></ul><ul><ul><li>Go through it gently </li></ul></ul><ul><ul><li>Talk about what they were feeling </li></ul></ul>

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