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This paper presents our e orts to accurately track a Head Mounted Display HMD in a large environment We review our current benchtop prototype introduced in WCF then describe our plans for building the full scale system Both systems use an inside out optical tracking scheme where lateral e ect photodiodes mounted on the user s helmet view ashing infrared(More)
Think of a quaternion Q as a vector augmented by a real number to make a four element entity. It has a real part Qcre and a vector part Qcve: If Qcre is zero, Q represents an ordinary vector; if Qcve is zero, it represents an ordinary real number. In any case, the ratio between the real part and the magnitude of the vector part jQcvej plays an important(More)
In this paper, a new optical system for real-time, three-dimensional position tracking is described. This system adopts an "inside-out" tracking paradigm. The working environment is a room where the ceiling is lined with a regular pattern of infrared LEDs flashing under the system's control. Three cameras are mounted on a helmet which the user wears. Each(More)
This paper presents our eeorts to accurately track a Head-Mounted Display (HMD) in a large environment. We review our current benchtop prototype (introduced in WCF90]), then describe our plans for building the full-scale system. Both systems use an inside-out optical tracking scheme, where lateral-eeect photodiodes mounted on the user's helmet view ashing(More)
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