OpenCV has a lot of what you'd need to do this sort of thing and also has pretty decent Python bindings. http://opencv.willowgarage.com/wiki/PythonInterface htt

OpenCV has a lot of what you'd need to do this sort of thing and also has pretty decent Python bindings. http://opencv.willowgarage.com/wiki/PythonInterface http://opencv.willowgarage.com/wiki/PythonInterface