1. A video augmented orientation sensor comprising: a base sensor adapted to measure and provide orientation information; a processor coupled to said base sensor, and adapted to: receive a current set of orientation information from said base sensor; receive a first captured image from an image sensor at a known orientation to said base sensor; identify at least two reference rage components in said first image; receive a subsequently captured image; compute displacement of said reference image components between said first and subsequent images; using said displacement, compute and update said current orientation information; and, at selected time intervals, receive an updated set of orientation information from said base sensor, and use said updated set to correct or replace said current orientation information.