Methods and apparatuses for assemblying, handling, and fabrication are disclosed in which targets are used on objects. The targets can be specifically applied to the object, or can be an otherwise normal feature of the object. Conveniently, the targets are removable from the object or covered by another...http://www.google.fr/patents/US6163946?utm_source=gb-gplus-shareBrevet US6163946 - Vision target based assembly
