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SUMMARY:(Research) Analogue Markers: A Marker Design Optimised to Represen
 t Continuous Quantities / (Research) Optical motion capture using Nintendo
  Wii controllers - Tom Craig and Simon Hay
DTSTART:20080219T150000Z
DTEND:20080219T160000Z
UID:TALK10838@talks.cam.ac.uk
CONTACT:Andrew Rice
DESCRIPTION:Research: Analogue Markers: A Marker Design Optimised to Repre
 sent Continuous Quantities\, Tom Craig\n\nFiducial markers may be used to 
 encode symbolic data such as URLs and keys into databases: the marker is d
 ivided into sectors\, and typically each sector is black or white. In this
  talk\, we propose a marker design that is optimised instead for represent
 ing continuous quantities  such as floating-point data\; it does this usin
 g a shape on the marker whose size or position is a function of the value 
 it represents. We achieve the attractive property that the precision of re
 adings increases monotonically with decreasing distance between camera and
  marker. We\ncall our marker design an "analogue" design\, in contrast to 
 sector-based "digital" designs.\n\nResearch: Optical motion capture using 
 Nintendo Wii controllers\, Simon Hay\n\nOptical motion capture systems tri
 angulate the 3D position of a subject between cameras calibrated to provid
 e overlapping views. Traditionally these systems have been bulky\, expensi
 ve and immobile. This talk will outline a system that takes advantage of t
 he infrared sensor built into Nintendo Wii controllers to provide  active 
 marker motion tracking at a fraction of the current cost and in a rugged\,
  portable form factor.
LOCATION:FW26\, William Gates Building
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