An apparatus for automatic inspection of printed circuit board assemblies inspects for the correct presence, positioning, and orientation of component parts mounted on a base printed circuit board by processing an image which is obtained from the base printed circuit board mounted with these component...http://www.google.de/patents/US4894790?utm_source=gb-gplus-sharePatent US4894790 - Input method for reference printed circuit board assembly data to an image processing printed circuit board assembly automatic inspection apparatus
