The present claims recite various steganographic and digital watermarking methods and apparatus. One claim recites a method of watermarking a representation of a physical object. The method includes: projecting a watermark orientation component onto a physical object; and using a camera or image sensor,...http://www.google.fr/patents/US8068636?utm_source=gb-gplus-shareBrevet US8068636 - Digital watermarking methods, programs and apparatus
Digital watermarking methods, programs and apparatus
