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<p>6DOF devices typically use a <a href="page.php?w=sensor_fusion">sensor fusion</a> algorithm to merge the data from the IMU and any other tracking sources, typically either one or more external sensors, or "<a href="page.php?w=Pose_tracking">inside-out" tracking</a> using outward facing cameras embedded in the headset. The sensor fusion algorithms that are used are often variants of a <a href="page.php?w=Kalman_filter">Kalman filter</a>. VR headsets can support <a href="page.php?w=Motion_controller">motion controllers</a>, which similarly combine</p><p>
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