Headtracking is a system allowing to cpature head position and movements, and convert them in data suitable in programs.
Sensor type , markers and tracking method alter the number of degrees of freedom, with a maximum of 6 degrees of freedom :
The most usual modes are :
This tracking is acheived by detecting movements with gyroscopic devices or accelerometers, in each axis.
PROS :
CONS :
This optical tracking uses an optical sensor to scan the user's face, and find some outstanding points, used as reference markers.
Head movements are decteted by the movements of those reference markers.
PROS :
CONS :
This optical tracking uses an optical sensor to detect a set of markers, fastened to the head. The optical sensor is setup to work in a high-contrast mode, to help dissociate markers from ambient light.
Head movements induce movements and twisting of the markers geometrical model image.
PROS :
CONS :
Poduct | Commercial/Free | Method | Max.Capability | Status | WWW |
---|---|---|---|---|---|
TrackIR | Commercial | Optical / markers | 6DOF | Active | http://www.trackir.com |
SPICA Helmet Tracker | Commercial | Optical / markers | 6DOF | Active | http://www.spicatek.com/HeadTracker/Headtracker.htm |
3D Visor | Commercial | Gyroscopic | 6DOF | Active | http://www.3dvisor.com |
FreeTrack | Free | Optical / markers | 6DOF | Active | http://www.free-track.org |
Cam2pan | Commercial | Optical / markers | 2DOF | ? | http://www.mousevision.com/game/index.html |
Freelook | Free | Optical / markers | 2DOF | ? | http://freelook.org/ |