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Virtual Reality Systems

Virtual Reality Systems. Presented by: Indrani indrani@cathedral-lonavala.org. icweb12.wordpress.com April, 2013. Introduction. What is VR?.

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Virtual Reality Systems

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  1. Virtual Reality Systems Presented by: Indrani indrani@cathedral-lonavala.org icweb12.wordpress.com April, 2013

  2. Introduction What is VR? Virtual Reality (VR) is the illusion of a three-dimensional, interactive, computer-generated reality where sight, sound, and sometimes even touch are simulated to create pictures, sounds, and objects that actually seem real.

  3. Introduction • VR must allow the user to view the environment from any point and at any angle • VR must allow the user to interact with objects in the environment. Major Concepts

  4. Types of VR • Use of Special Purpose Equipment • Feel of Presence Immersive VR

  5. Types of VR • Also known as Desktop VR • Use of a monitor to display the visual world • Does not require special hardware • Low Cost Low Performance Less Immersion Window on the World (WoW) ø ø

  6. Types of VR • Real-time telepresence Interactions are reflected to some real world objects. • Delayed telepresence Interactions are recorded, and after satisfaction is applied to the real-world object. Telepresence

  7. Types of VR • Computer generated inputs merged with the user’s view of the real world Augmented VR

  8. Components of VR • VR Hardware • VR Software

  9. VR Hardware • Primary user input interfaces • Tracking interfaces • Visual interfaces • Auditory interfaces • Haptic interfaces • Olfactory interfaces Classification

  10. Primary Interfaces • Keyboard, Mouse, Joystick • 3D Pointing Devices • Spaceball • CyberWand • Ring Mouse • EGG

  11. Primary Interfaces (cont’d) • Whole-hand and body input • 5th Glove • Handmaster • ArmMaster • TCAS Dataware

  12. Tracking Interfaces • Measure head, body, hand or eye motion • Major Characteristics • Resolution • Accuracy • System Responsiveness • Sample rate, data rate, update rate and latency • Major Technologies • Magnetic • Acoustics • Optical

  13. Tracking Interfaces (cont’d) • Head & Body Tracking • Polhemous IsoTrak II & FastTrak • Flock of Bird • VideoDesk • Eye Tracking • BioMuse • DPI Eyetrackey

  14. Visual Interfaces • Field of View (FOV) • Resolution • Refresh rate • Brightness • Color Important Factors

  15. Visual Interfaces (cont’d) • Head Mounted Display (HMD) • Datavisor 10x HMD • VR4000 • I-glasses! • VFX1 • BOOM

  16. Visual Interfaces (cont’d) • Stereoscopic Glasses • Shutter glasses • Passive glasses • Autostereoscopic • HDVD

  17. Auditory Interfaces • Auralization • 3D simulation of a complex acoustic field • Sonification • Audible display of data • Speech Recognition • Some products • Acoustetron II • RSS-10 Sound Space Processor • Q products

  18. Haptic Interfaces • Tactile (touch) • CyberTouch • Univ. of Salford • Kinesthetic (force) • HapticMaster • PHANToM

  19. Olfactory Interfaces • Electronic Nose • Storage Technologies • Liquid • Gel • Microencapsulation • Some Products • BOC Group Olfactory Delivery System • Univ. of Wollongong eNose

  20. Software Components • Input Process • Simulation Process • Rendering Process • World Database

  21. Input Process • Control devices that send data to the computer • Devices should be checked regularly (eg. per frame)

  22. Simulation Process • The core of a VR program • handles interactions, object behaviors, simulations of physical laws and determines the world status • A discrete process that is iterated once for each frame

  23. Rendering Process • Creation of the sensations that are output to the user • Visual Rendering • Using polygons to represent objects • Ray tracing & lights • Flat vs. smooth shading • Z buffering • Auditory, haptic and olfactory rendering

  24. World Database • Stores data on objects and the world • ASCII vs. binary • Single file vs. Database • Centralized vs. distributed • Standard vs. proprietary formats • Virtual Reality Modeling Language (VRML)

  25. Important Issues • Interaction Techniques • Navigation Techniques • Collision Detection • Level of Detail (LOD)

  26. VR Applications Education Crossing street Construct3D

  27. VR Application Treatment of Acrophobia

  28. VR Applications Recreation

  29. VR Application Design

  30. VR Application Simulation Being 747 Flight Simulation

  31. VR Application User Interface WNMS

  32. VR Application Telepresence Telesurgery Augmented surgery TeleRobotics

  33. VR Application Information Visualization Quick Sort Acetic Acid

  34. VR Application Entertainment Virtual racing

  35. VR Application Military

  36. Conclusion • VR introduces a new way of interacting with computers • The best of VR is yet to come • Web is very suitable for VR applications, but the proper technology is not yet there

  37. Thank You for Listening

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