An optical tracker system for tracking a location and orientation of a first object, comprising: a display module ; a tracker display unit , characterized by : a prediction module configured to determine a predicted location and orientation of the first object as a spatial prediction, wherein: the display module is coupled to the prediction module and configured to generate display commands for a fiducial symbol based on the spatial prediction, and the tracker display unit is coupled to the prediction module , is configured to receive the display commands and is configured to display the fiducial symbol based on the display commands, wherein the tracker display unit is an active matrix display device; a camera unit configured to capture, as a captured appearance, an image of the displayed fiducial symbol ; and a position determination module coupled to the camera unit and configured to receive the image from camera unit, the position determination module configured to identify the fiducial symbol and determine the location and the orientation of the first object based on the captured appearance of the fiducial symbol. a display module ; a tracker display unit , characterized by : a prediction module configured to determine a predicted location and orientation of the first object as a spatial prediction, wherein: the display module is coupled to the prediction module and configured to generate display commands for a fiducial symbol based on the spatial prediction, and the tracker display unit is coupled to the prediction module , is configured to receive the display commands and is configured to display the fiducial symbol based on the display commands, wherein the tracker display unit is an active matrix display device; a camera unit configured to capture, as a captured appearance, an image of the displayed fiducial symbol ; and a position determination module coupled to the camera unit and configured to receive the image from camera unit, the position determination module configured to identify the fiducial symbol and determine the location and the orientation of the first object based on the captured appearance of the fiducial symbol. a prediction module configured to determine a predicted location and orientation of the first object as a spatial prediction, wherein: the display module is coupled to the prediction module and configured to generate display commands for a fiducial symbol based on the spatial prediction, and the tracker display unit is coupled to the prediction module , is configured to receive the display commands and is configured to display the fiducial symbol based on the display commands, wherein the tracker display unit is an active matrix display device; the display module is coupled to the prediction module and configured to generate display commands for a fiducial symbol based on the spatial prediction, and the tracker display unit is coupled to the prediction module , is configured to receive the display commands and is configured to display the fiducial symbol based on the display commands, wherein the tracker display unit is an active matrix display device; a camera unit configured to capture, as a captured appearance, an image of the displayed fiducial symbol ; and a position determination module coupled to the camera unit and configured to receive the image from camera unit, the position determination module configured to identify the fiducial symbol and determine the location and the orientation of the first object based on the captured appearance of the fiducial symbol. <EOS>