SYSTEM AND METHOD FOR POSITION TRACKING IN A HEAD MOUNTED DISPLAY

摘要

A position tracking system for a head mounted display, the system comprising at least one image capture device (106, Figure 2) mounted or mountable in or on said head mounted display (100, Figure 2), and a processor (104, Figure 2) configured, in use, to: a)perform a calibration process in which it receives image data from said at least one image capture device in respect of a user's environment (201), identifies discernible features (200) therein and stores a three-dimensional representation of said environment in terms of said discernible features (200); and b)after said calibration process, receive image data from said at least one image capture device (106, Figure 2) in respect of said user's environment, identify in said image data one or more transformations between said discernible features (200), compare said one or more transformations with said three-dimensional representation of said user's environment (200), and thereby track the position and/or orientation of said head mounted display (100, Figure 2) within said environment (201).