A method and apparatus for embedding information in an image during relative movement between a print medium and an ink jet print head is provided. A plurality of first lines are printed and a plurality of second lines are printed. Each of the first lines includes a plurality of first dots and a plurality...http://www.google.es/patents/US7328995?utm_source=gb-gplus-sharePatente US7328995 - Method and apparatus for embedding information in an image
Method and apparatus for embedding information in an image
