In a method of identifying an object of the type wherein the object is photographed by a television camera, and a portion of the contour line of the object is detected by a photographed picture image, the picture image is scanned by a filter for designating a first group of a predetermined number of...http://www.google.com.au/patents/US4876729?utm_source=gb-gplus-sharePatent US4876729 - Method of identifying objects
