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Geoffrey B Rhoads: Linking of computers based on steganographically embedded digital data. Digimarc Corporation, William Y Conwell, Digimarc Corporation, April 1, 2003: US06542927 (297 worldwide citation)

A printed object, such as an item of postal mail, a book, printed advertising, a business card, product packaging, etc., is steganographically encoded with plural-bit data. When such an object is presented to an optical sensor, the plural-bit data is decoded and used to establish a link to an intern ...


22
Ravi K Sharma, Adnan M Alattar, Farid Ahmed, Geoffrey B Rhoads: Wavelet domain watermarks. Digimarc Corporation, Joel R Meyer, Digimarc Corporation, May 7, 2002: US06385329 (297 worldwide citation)

A wavelet domain watermark encoder and decoder embed and detect auxiliary signals in a media signal, such as a still image, video or audio signal. A watermark orientation signal is embedded in a wavelet decomposed signal to facilitate detection of the watermark in a geometrically distorted version o ...


23
Geoffrey B Rhoads: Security system for photographic identification. Digimarc Corporation, Klarquist Sparkman Campbell Leigh & Whinston, November 24, 1998: US05841886 (286 worldwide citation)

Security of photographic identification documents is enhanced by embedding within the photographic image encoded information that may be correlated to other information pertaining to the individual represented by the image, such other information being, for example, printed on the document adjacent ...


24
Geoffrey B Rhoads: Audio- and graphics-based linking to internet. Digimarc Corporation, Willam Y Conwell, Digimarc Corporation, September 4, 2001: US06286036 (276 worldwide citation)

Address information is obtained from audio or from a graphic and used to link to the internet. The address information can be a literal URL, or may be an index to a database from which a corresponding URL can be obtained.


25
Hugh L Brunk, Kenneth L Levy: Method, apparatus and programs for generating and utilizing content signatures. Digimarc Corporation, October 30, 2007: US07289643 (270 worldwide citation)

The present invention relates to deriving and utilizing content signatures. A content signature is a representation of a content item, which is derived from the content item itself. According to the invention, a method of generating a content signature for a signal is provided. The method includes t ...


26
Kevin C Jones, Cynthia K Aggson, Tony F Rodriguez, Brian Mosher, Kenneth L Levy, R Stephen Hiatt, Geoffrey B Rhoads: Digital asset management and linking media signals with related data using watermarks. Digimarc Corporation, Digimarc Corporation, August 22, 2006: US07095871 (264 worldwide citation)

A method of performing digital asset management of media content. In this method, a watermark reader device reads a watermark embedded into media content. The watermark conveys watermark information, such as a content identifier and creator identifier. The reader forwards the watermark information t ...


27
Geoffrey B Rhoads: Method and apparatus responsive to a code signal conveyed through a graphic image. Digimarc Corporation, Klarquist Sparkman Campbell Leigh & Whinston, January 20, 1998: US05710834 (263 worldwide citation)

An identification code signal is impressed on a carrier to be identified (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned and the carrier thereby identified. The method and apparatus are characterized by robustness desp ...


28
Geoffrey B Rhoads: Embedding auxiliary signals with multiple components into media signals. Digimarc Corporation, September 26, 2006: US07113614 (250 worldwide citation)

A digital watermark system embeds auxiliary signals in multimedia types, including audio, still and moving images, and physical objects. These auxiliary signals, referred to as digital watermarks, include multiple components that can perform differing functions and that are embedded with different l ...


29
Geoffrey B Rhoads, Ravi K Sharma: Watermark detection using a fourier mellin transform. Digimarc Corporation, Joel R Meyer, Digimarc Corporation, June 18, 2002: US06408082 (244 worldwide citation)

A watermark detector maps target media data into a log polar coordinate system and correlates the target media with a detection watermark to compute orientation parameters. The correlation process computes a measure of correlation for an array of potential orientation parameter candidates. Evaluatin ...


30
Geoffrey B Rhoads: Security documents with hidden digital data. Digimarc Corporation, William Y Conwell, Digimarc Corporation, January 29, 2002: US06343138 (238 worldwide citation)

An identification code signal is hidden in a carrier signal (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned. The carrier signal can thereby be identified, or some machine responsive action can thereby be taken. The tec ...