A robust means of watermarking a digitized image with a highly random sequence of pixel brightness multipliers is presented. The random sequence is formed from ‘robust-watermarking-parameters’ selected and known only by the marker and/or the marking entity. A watermarking plane is generated having...http://www.google.fr/patents/US7130442?utm_source=gb-gplus-shareBrevet US7130442 - Protecting images with an image watermark
