Optitrack

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We have 8 flex-v100 Optitrack cameras + various extra equipment.

[edit] Important

  • Remember to unplug the USB cables before turning off the power, otherwise the cameras will try to draw all the power from the computer.
  • Use the D-link USB hubs, with 3A power supply. The cameras draw 500 mA each.
  • Split up the cameras on two or more USB busses to prevent dropouts (using extra USB pcmcia card).

[edit] Software

We have access to the different software (comparison):

  • SDK: basic tracking features that can be embedded elsewhere.
  • Point Cloud Toolkit: the most basic software for finding 3D positions from the 2D cameras.
  • RigidBody Toolkit: defining rigid bodies that can be tracked in 3D or 6D
  • Arena: the full package for recording and playback.

[edit] Streaming

There are several different streaming options available in NaturalPoint software:

  • NatNet: NaturalPoint Streaming Sample Distribution Files. This is NaturalPoints own implementation, and is the one that is implemented in the KTH application.
  • VRPN: Virtual Reality Peripheral Network. This seems to be the most widely accepted streaming format, and there is an SDK available.
  • TrackD: VR streaming format. This is a proprietary format and it requires Trackd to be licensed and installed.

We are currently testing two different command line applications for connecting to the cameras and sending out OSC, one developed at KTH and another in Gent. They just need some better documentation before they are made publicly available.

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