Patent ID: 9710057
Date: 2017-07-18
CPC Classifications: G02B,G06F,G06T

Claim:
1. A method, comprising, capturing video frames using a camera, the video frames configured to capture markers on a head mounted display (HMD), the markers on the HMD are analyzed in the captured video frames to determine position and orientation of the HMD for processing changes to scenes generated during rendering of multimedia content that is displayed by the HMD; and estimating a separation distance between a marker on a front unit of the HMD and a marker on a rear section of the HMD, the front unit and the rear section being coupled together by an adjustable headband, the estimating includes analyzing a plurality of video frames and inertial data captured when the video frames were captured, the analyzing producing an estimated separation distance between the marker on the front unit of the HMD and a marker on the rear section of the HMD, wherein the estimated separation distance is used during further tracking of position and orientation of the HMD, as markers on the front unit and the rear section are captured and analyzed from the captured video frames.