Pathfinder: Vision Based Navigator

This is a tech report that describes how to build a Vision Based robot. A demo of the built system can be seen at http://www.youtube.com/watch?v=kcQxYYyTBGM

Vision Based Navigator (Pathfinder) is a robot, which is controlled by system through
parallel port interface. System takes field (Surface on which robot moves) image through
camera and act as vision system of pathfinder. All the calculation/processing of image is
done continuously by the system. These calculations guide pathfinder to navigate on
intended path to destination.