Patent ID: 11947122
Assignee: VARJO TECHNOLOGIES OY
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 8:
9. A method for tracking, the method comprising:
estimating a relative pose of at least one user-interaction controller with respect to a head-mounted device (HMD), based on controller-pose-tracking data generated by a controller-pose-tracking means arranged in the at least one user-interaction controller and HMD-pose-tracking data generated by an HMD-pose-tracking means;
determining a sub-set of light sources from amongst a plurality of light sources that would be visible from a perspective of at least one camera, based on the estimated relative pose of the at least one user-interaction controller with respect to the HMD and an arrangement of the plurality of light sources arranged spatially around the at least one user-interaction controller of the HMD, the at least one camera being arranged on a portion of the that faces a real-world environment in which the HMD is in use;
selectively controlling the plurality of light sources such that only the light sources of the sub-set are activated, whereas remaining light sources from amongst the plurality of light sources are deactivated;
processing at least one image of the real-world environment, captured by the at least one camera, for identifying an operational state of at least one light source of the sub-set that is visible in the at least one image, wherein the at least one image is indicative of an actual relative pose of the at least one user-interaction controller with respect to the HMD; and
correcting the estimated relative pose of the at least one user-interaction controller with respect to the HMD to determine the actual relative pose of the at least one user-interaction controller with respect to the HMD, based on the operational state of the at least one light source.