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

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Interacting with Real Objects in VR. How important are real objects? ... Most virtual environments do not provide an avatar (user self-representation) Why? ... – PowerPoint PPT presentation

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


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 Loc.
  • 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 -gt 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?dhvid1807432839cf
    trailer

Thinking
Digital Character
Perceiving
Responding
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
Perceiving
Responding
Interaction
Perceiving
Responding
Thinking
Participant
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