In order to get the functionality it needed, APX grafted a 5 megapixel camera, mic and a full suite of motion sensors to provide nine-axis head tracking onto a Moverio headset.

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Today motion sensing has progressed to being three-axes of acceleration, and three axis of rotation (technically called gyroscopes).

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Examples include the FSM-SENS-1, a 6-axis sensor-only module that integrates with an external Freespace MotionEngine, and the FSM-SI-2, which combines the Freespace MotionEngine on an embedded microprocessor along with a 3-axis digital gyroscope, 3-axis digital accelerometer and optional 3-axis magnetometer (compass) to provide high-performance, calibrated motion data for a variety of applications.

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