Docstoc

AUGMENTED REALITY_ FEATURE DETECTION

Document Sample
AUGMENTED REALITY_ FEATURE DETECTION Powered By Docstoc
					AUGMENTED REALITY, FEATURE DETECTION
          Applications on camera phones
          Prof. Charles Woodward, Digital Systems
     VTT TECHNICAL RESEARCH CENTRE OF FINLAND
VTT TECHNICAL RESEARCH CENTRE OF FINLAND




AUGMENTED REALITY (AR)
  Mixes virtual objects with view of real world
     - Instead of completely virtual world (VR)
     - Real-time, interactive, 3D


  Marker based tracking
     - Marker’s 3D location is registered from video image
     - Virtual objects are augmented on marker


  Example: augmented interior design
     -   Furniture is ”light” to move around
     -   Easy to try out different alternatives
     -   No modelling of real environment required
     -   Hardware: PC & web camera (& video glasses)
     -   ... or, just digital camera / camera phone ! …
VTT TECHNICAL RESEARCH CENTRE OF FINLAND



AUGMENTED INTERIOR DESIGN -
CONSUMER SOLUTIONS

 ARInterior
    -   Single marker placed on floor
    -   Digital camera images uploaded to computer
    -   Virtual furniture selected and placed with menu/mouse
    -   Features: lighting, shadows, hiding of marker
    -   Potential also for Internet portal solution


 ARPhone
    - Placing virtual furniture on phone’s camera image
    - Based on feature tracking - no markers required
VTT TECHNICAL RESEARCH CENTRE OF FINLAND



CASE STUDY: DIGITALO                                                         Construction site
                                                                             (2003)

  VTT’s new head offices
     - Digitalo = “Digital Building”


  History
     - Construction started Dec 2003
     - Building ready Oct 2005


  Various AR/VR methods used and
  tested
     -   Still image visualisation
     -   Immersive Virtual Reality
     -   Mobile Augmented Reality
     -   Augmented Web Camera
     -   Augmented Scale Model


  One of the most comprehensive
  case studies in the world                Illustration of Digitalo (still
                                           image, 2003)
VTT TECHNICAL RESEARCH CENTRE OF FINLAND



VIRTUAL REALITY, AVATARS
  Walk through inside virtual Digitalo
     - “Lumeportti” - VTT’s proprietary CAVE system
       for 3D data visualisation and collaboration
     - Utilises video projectors, networked PCs and
       low-cost VR technology
     - Provides steroscopic walk-through functionality
       with gesture-based interaction
     - Incorporates autonomous avatars walking
       around in the 3D scene
VTT TECHNICAL RESEARCH CENTRE OF FINLAND



MOBILE AUGMENTED REALITY

  Outdoors visualisation of Digitalo
    - Commissioned in 2003, using PDA device
    - Lightweight, “user friendly”, inexpensive
    - Frozen view, multiple users, etc.


  Current implementation
    - Tablet PC, with optional video glasses
    - Local processsing, or streaming video
    - Markerless, feature based tracking


  Other applications, e.g.
    - Interior design, parks, landscapes
    - Industrial apps, production, mainentance
    - Consumer applications <-> camera phones!
VTT TECHNICAL RESEARCH CENTRE OF FINLAND



AUGMENTED WEB CAMERA

  Digitalo augmented in live web
  camera image
      - Presentation for future users of building
      - Also, follow-up, comparison with
        original plans
      - View with or without virtual building
      - Real-time interaction (zoom, pan, etc.)
      - Viewing inside to the building
      - Building history stored on video
VTT TECHNICAL RESEARCH CENTRE OF FINLAND




AUGMENTED SCALE MODEL
  Digitalo augmented on conference
  table
     - Viewing through video glasses (stereo)
     - Move around model, communicate with
       other people
     - Also, virtual reality tour utilising feature
       based tracking


  Features
     - Virtual menu for user interaction
     - Add, move and remove parts (“AR-
       catalogue”)
     - Realism: textures, reflections, shadows
       etc.
     - Interact with lighting conditions, etc.
VTT TECHNICAL RESEARCH CENTRE OF FINLAND



DIGITALO / SUMMARY
  Still images
     - presentation, appearance


  Augmented Scale Model
     - for planning, collaboration


  Virtual Reality, Avatars
     - feeling of interior, space


  Mobile Augmented Reality
     - feeling of location, presence


  Augmented Reality - Webcam
     - remote presentation, follow-up


  Augmented Reality Interior Design
     - once building is (almost) ready ...
VTT TECHNICAL RESEARCH CENTRE OF FINLAND




                                   THANK YOU!

                               Prof. Charles Woodward
                               charles.woodward@vtt.fi
                                Tel. +358 20 722 5629



                           Videos and Demos availabe at:

                              http://www.vtt.fi/multimedia

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:7
posted:7/8/2012
language:English
pages:10