Calibration of orientations of a gyroscope of a motion tracking system

A motion tracking system comprising:

• a computing device comprising at least one processor and at least one memory;
• and
• first and second sensors, each sensor at least comprising a gyroscope;
• the at least one processor is configured, together with the at least one memory, to:
• digitally process orientations measured by the first and second sensors while a person having the first and second sensors arranged on an upper arm and a chest thereof, respectively, performs a predetermined movement, the orientations being processed so as to digitally compute an orientation difference between the orientations measured by the first sensor and the orientations measured by the second sensor;
• and
• adjust operation of the motion tracking system based on the orientation difference computed;
• wherein the predetermined movement comprises the person moving a torso thereof with respect to a hip of the person, and during the predetermined movement the upper arm is not rotated with respect to a shoulder of the person connected to the upper arm.

A computer-readable storage medium comprising instructions which, when executed by a computing device, cause the computing device to perform operations comprising:

• digitally processing orientations measured by first and second sensors of a motion tracking system while a person having the first and second sensors arranged on an upper arm and a chest thereof, respectively, performs a predetermined movement, the orientations being processed so as to digitally compute an orientation difference between the orientations measured by the first sensor and the orientations measured by the second sensor, the first and second sensors each comprising a gyroscope;
• and
• adjusting operation of the motion tracking system based on the orientation difference computed;
• wherein the predetermined movement comprises the person moving a torso thereof with respect to a hip of the person, and during the predetermined movement the upper arm is not rotated with respect to a shoulder of the person connected to the upper arm.