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Head-Tracked Displays (HTDs)

Head-Tracked Displays (HTDs). Sherman and Craig, pp. 140-151. Head-tracked Displays. Displays in which the user’s head is tracked and the image display screen is located at a fixed location in physical space. Examples? CRT Virtual Workbench or ImmersaDesk CAVE Many large screen displays.

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Head-Tracked Displays (HTDs)

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  1. Head-Tracked Displays (HTDs) Sherman and Craig, pp. 140-151

  2. Head-tracked Displays • Displays in which the user’s head is tracked and the image display screen is located at a fixed location in physical space. • Examples? • CRT • Virtual Workbench or ImmersaDesk • CAVE • Many large screen displays

  3. Stationary Display 3D Glasses Head Tracker CRT HTD (Fishtank VR)

  4. Standard Display Stereoscopic Display Screen User C C A A B B Stereoscopic Display

  5. 3D Glasses 3D Display 3D Object Virtual Workbench

  6. CAVE

  7. Any Projected Large Stereoscopic Screen

  8. Characteristics • Large • Projection-Based (except for Fishtank VR) • Stereoscopic • Head Tracked • Stationary Display Screen(s) • Let’s try to identify the pros and cons and application domains

  9. 3D Glasses 3D Display 3D Object

  10. Larger field-of-view than HMD Field of regard is smaller than HMD but larger than a typical CRT Display Projectors must be aligned properly. Architectural Statement! Front Projection (user may be in the way). Back Projection (takes up even more space) When multiple screens are arranged at or near 90 degree angles, reflection between screens may be a problem Large Screen Projection

  11. Advantages Viewer not isolated from real objects or other people in the virtual world space. Less physical gear to wear than HMD Potentially better resolution than HMD Large field of view compared to HMD or CRT. Disadvantages Usually one one person is head-tracked. Real objects may occlude virtual objects in inappropriate ways Multiple screens require more computation At least one direction is not part of the virtual world. Lighting Large Screen Projection

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