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Chromakeymocapvideos Chromakeymocapvideos Presentation Transcript

  • Where Digital Worlds Meet the Real World: From Chroma Key to Motion Capture
  • 1. Do you believe whatever you see in the movies? Here's how to portray the D-Day landings with 3 people and a green screen...
  • So how did that work? Green screen/chroma key techniques allow part of the image to be masked out and then replaced with a different image playing within that mask
  • (and what's so special about GREEN anyway...?)
  • Motion Capture (or mo cap) is the process of capturing human or animal movements in such a way that they can be used to animate “digital actors”
  • By placing markers on and close to skeletal joints, it is possible to capture which bits of the skeleton move – and how – whenever a particular action is performed
  • ...and it's not just for capturing human movements...
  • So how does motion capture work for games?
  • Having to use markers to capture the movements adds a significant overhead to the process of motion capture, (it can be a fiddly job locating the markers).
  • Using markers also limits what data is actually captured... ...so ideally, we'd like a markerless system
  • Why? Because markerless motion capture can be used to capture tiny facial movements, as well as full body movements
  • http://digitalworlds.wordpress.com