A self-propelled harvester is provided with apparatus for tracking a crop line and steering the harvester along the crop line without operator assistance. The apparatus includes a video camera for viewing the landscape in front of the harvester and forming an image which may be electronically scanned...http://www.google.fr/patents/US5911669?utm_source=gb-gplus-shareBrevet US5911669 - Vision-based crop line tracking for harvesters
