Methods developed in the Computer Vision community for tracking moving shapes are showing great potential for applications in real-time graphics. Tracking techniques allow graphical entities such as curves to be superimposed on a video data-stream, marking out certain objects and following their motions. The techniques have been demonstrated on a variety of moving objects including human hands, heads, lips both from the side and the front, various vehicles, cabbages viewed from a moving tractor and even a pig in its pen. The output from such trackers can be taken in the form of motion signals which could then be used to drive a remote animation.