A method of controlling the reproduction of copyrighted images, includes the steps of: a) providing an image medium having a predetermined pattern of micro-dots; b) steganographically embedding a reproduction authorization signal within some copyrighted digital images and not in others; c) printing the...http://www.google.fr/patents/US6711277?utm_source=gb-gplus-shareBrevet US6711277 - Method of controlling the reproduction of copyrighted images
Method of controlling the reproduction of copyrighted images
