Method and apparatus operates on recognizable target images disposed on upper and lower layers of master photographic images, and on apertures formed in an intermediate layer to resolve positional misalignments and requisite correctional movements of the layers to align upper and lower layers with the...http://www.google.es/patents/US6268920?utm_source=gb-gplus-sharePatente US6268920 - Registration of sheet materials using statistical targets and method
Registration of sheet materials using statistical targets and method
