1
Gordon W Braudaway, Frederick C Mintzer: Protecting images with multiple image watermarks. International Business Machines Corporation, Louis P Herzberg, June 13, 2006: US07062067 (4 worldwide citation)

The present invention provides methods and apparatus for imparting a multiplicity of watermarks onto a digitized image. The image includes a plurality of pixels, wherein each of the pixels includes brightness data that represents one brightness value if the image is monochrome, or a plurality of bri ...


2
Gordon W Braudaway, Frederick C Mintzer: Protecting images with multiple image watermarks. International Business Machines Corporation, Ibm Corporation, Intellectual Property Law Dept, July 10, 2003: US20030128860-A1

The present invention provides methods and apparatus for imparting a multiplicity of watermarks onto a digitized image. The image includes a plurality of pixels, wherein each of the pixels includes brightness data that represents one brightness value if the image is monochrome, or a plurality of bri ...