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Wenjun Zeng: Method for extracting multiresolution watermark images to determine rightful ownership. Sharp Laboratories of America, Robert D Varitz PC, April 16, 2002: US06373974 (59 worldwide citation)

A method for embedding and extracting visually imperceptible indicia in an image includes embedding a visually imperceptible indicia in an original image; testing a test image for an embedded visually imperceptible indica; and extracting the visually imperceptible indicia from the test image to dete ...


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Wenjun Zeng: Method for extracting multiresolution watermark images to determine rightful ownership. Robert D Varitz, August 23, 2001: US20010016058-A1

A method for embedding and extracting visually imperceptible indicia in an image includes embedding a visually imperceptible indicia in an original image; testing a test image for an embedded visually imperceptible indica; and extracting the visually imperceptible indicia from the test image to dete ...