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Virtual Reality and Digital Characters: New Modalities for Human Computer Interaction

Virtual Reality and Digital Characters: New Modalities for Human Computer Interaction. G2V2 Talk September 5 th , 2003 Benjamin Lok. Welcome!. My name is Benjamin Lok. Pronounced like “lock” as in lock the door. Not Loke as in Tone L ōc . Feel free to call me Ben. A bit about myself

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Virtual Reality and Digital Characters: New Modalities for Human Computer Interaction

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  1. Virtual Reality and Digital Characters: New Modalities for Human Computer Interaction G2V2 Talk September 5th, 2003 Benjamin Lok

  2. Welcome! • My name is Benjamin Lok. • Pronounced like “lock” as in lock the door. • Not Loke as in Tone Lōc. • Feel free to call me Ben. • A bit about myself • Background • Interests

  3. Quick Research Bio • University of Tulsa • Medical Informatics • University of North Carolina • Tracking in Virtual Environments (MS) – 3rdTech HiBall • Avatars in Virtual Environments • Interaction in Virtual Environments • University of North Carolina at Charlotte (Postdoc) • Digital Characters • Virtual Reality • Computer Vision • Research Areas • Interactive Computer Graphics (Rendering) • Virtual Reality • Human Computer Interaction • Digital Characters • Assistive Technologies • Computational Geometry / Computer Vision / Image Processing

  4. Human Computer Interaction • Q: What is the field of HCI? • A: Discipline concerned with the study, design, construction and implementation of human-centric interactive computer systems • Not only Computer Scientists! • Comp Science – application and design of interfaces • Sociology and Anthropology – how humans and technology adapt to each other • Ergonomics – safety • Psychology – cognitive processes and behavior of users • Linguistics – Development of human and machine languages From: www.pcwebopedia.com

  5. Human Computer Interaction • We are concerned about designing the interface between the user and the system. • Examples of HCI topics: • Graphical User Interface • Widgets • Interfaces themselves • Mice, keyboard, joystick • Evaluation of interfaces

  6. Fun Question • From www.asktog.com • A right-handed user is known to be within 10 pixels of the exact center of a large, 1600 X 1200 screen. You will place a single-pixel target on the screen that the user must point to exactly. List the five pixel locations on the screen that the user can access fastest. For extra credit, list them in order from fastest to slowest access. • A: (Right handed user) • The pixel immediately at the current cursor location • The bottom-right corner. • The top-left corner. • The top-right corner. • The bottom-left corner.

  7. Virtual Reality • Computer generated synthetic environment • Virtual Worlds • Immersive • Sensory Feedback • Interaction

  8. Digital Characters • A new medium to interact with system information • Spectrum from the paper clip -> AIBO • Why would we want a digital character? • Dynamic • Better than keyboard and mouse for some tasks • Natural interaction

  9. Current Research • Combine HCI with VR • If all things in VR are virtual, how do you interact with the environment? • Combine HCI with digital characters • How do you interact with digital characters? • Interaction = input and output

  10. Merging real and virtual spaces

  11. Interacting with Real Objects in VR Purely Virtual • How important are real objects? • A: For cognitive (problem solving), very important! Real Space Hybrid Vis. Faithful Hybrid

  12. NASA Case Study

  13. Videos of Task Having a hybrid environment provides substantial benefits in prototype design.

  14. Locomotion in VR • Another aspect of ‘natural interaction’ is locomotion (define). • Most common way: • Use a ‘virtual walking’ metaphor. • Does this reduce effectiveness? • We can test this because of new wide-area tracking technologies.

  15. Locomotion in VR Video • Play video

  16. Results Natural interaction is better!

  17. Avatars in VE • Most virtual environments do not provide an avatar (user self-representation) • Why? Because tracking the human body is difficult. • Solution: Use simple computer vision to track colored markers to generate an avatar

  18. STRAPS Video • Play Video

  19. Digital Characters http://movies.yahoo.com/shop?d=hv&id=1807432839&cf=trailer Thinking Digital Character Responding Perceiving Interaction Perceiving Responding Thinking Participant

  20. DIgital ANimated Avatar (DIANA)

  21. Upcoming Research • How do we naturally interact with a digital character? • Display • Perception • Efficacy • Combine Straps with DIANA • Avatar Telephone • Acting practice

  22. VR Interaction • Getting real objects into virtual environments • How do you naturally interact with virtual objects?

  23. Questions?

  24. Digital Character Thinking Responding Perceiving Interaction Perceiving Responding Thinking Participant

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