Johnston, D.J.Clark, A.F.Peter Hall and Philip Willis2016-02-092016-02-0920033-905673-54-1https://doi.org/10.2312/vvg.20031022A system for vision-based ego location using 'targets' or 'fiducials' is described. The system is robust and operates on commodity hardware in real time. The accuracy of the system is assessed and found to be good enough to support some augmented reality applications. Two example applications are described: the control of an avatar in a shared virtual environment and a video 'joystick' for manipulating 3D models.I.4.8 [Image Processing and Computer Vision]Scene Analysis10.2312/vvg.20031022D.J. Johnston and A.F. Clark-I.4.8 [Image Processing and Computer Vision]: Scene Analysis