A method and system for watermarking and recovering a watermarked digitized image for subsequent authentication. The digitized image comprises spatial domain data signals reproduced from an original image. A transformer transforms the spatial domain data signals into frequency domain data signals, including...http://www.google.fr/patents/US6757407?utm_source=gb-gplus-shareBrevet US6757407 - Transform domain image watermarking method and system
Transform domain image watermarking method and system
