1
Geoffrey B Rhoads: Linking of computers based on optical sensing of digital data. Digimarc Corporation, William Y Conwell, Digimarc Corporation, October 30, 2001: US06311214 (683 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 ...


2
Geoffrey B Rhoads, Ammon E Gustafson: Watermark embedder and reader. Digimarc Corporation, Joel R Meyer, Digimarc Corporation, September 2, 2003: US06614914 (676 worldwide citation)

A watermark system includes an embedder, detector, and reader. The watermark embedder encodes a watermark signal in a host signal to create a combined signal. The detector looks for the watermark signal in a potentially corrupted version of the combined signal, and computes its orientation. Finally, ...


3
Kenneth L Levy, Geoffrey B Rhoads: Connected audio and other media objects. Digimarc Corporation, Joel R Meyer, Digimarc Corporation, January 7, 2003: US06505160 (644 worldwide citation)

Media objects are transformed into active, connected objects via identifiers embedded into them or their containers. In the context of a user's playback experience, a decoding process extracts the identifier from a media object and possibly additional context information and forwards it to a se ...


4
Geoffrey B Rhoads, Megan I Livermore: Cell phones with optical capabilities, and related applications. Digimarc Corporation, Digimarc Corporation, September 20, 2005: US06947571 (536 worldwide citation)

A cell phone is equipped with a 2D optical sensor, enabling a variety of applications. For example, such a phone may also be provided with a digital watermark decoder, permitting decoding of steganographic data on imaged objects. Movement of a phone may be inferred by sensing movement of an imaged p ...


5
Geoffrey B Rhoads: Watermark enabled video objects. Digimarc Corporation, Steven W Stewart, Digimarc Corporation, June 25, 2002: US06411725 (432 worldwide citation)

Watermarks in video signals or the accompanying audio track are used to associate video objects in a video sequence with object specific actions or information. A video object refers to a spatial and temporal portion of a video signal that depicts a recognizable object, such as a character, prop, gr ...


6
Tony F Rodriguez, Geoffrey B Rhoads, Bruce L Davis, J Scott Carr: Watermarked business cards and methods. Digimarc Corporation, William Y Conwell, Digimarc Corporation, November 18, 2003: US06650761 (352 worldwide citation)

A person's business card is steganographically encoded with plural-bit data. When presented to a computer system with an optical sensor, the plural-bit data is decoded and used to trigger various functionality. For example, the system can link to a remote data store containing updated contact i ...


7
Alastair M Reed, Geoffrey B Rhoads: Color adaptive watermarking. Digimarc Corporation, Joel R Meyer, Digimarc Corporation, July 8, 2003: US06590996 (309 worldwide citation)

A color mapping process enhances a watermark by computing a change in colors that is less visible for a given watermark strength. The mapping process provides smooth transitions from one color region to another, and may be implemented efficiently with a 3D look up table. A user interface scheme enab ...


8
Geoffrey B Rhoads: Linking of computers based on steganographically embedded digital data. Digimarc Corporation, William Y Conwell, Digimarc Corporation, April 1, 2003: US06542927 (293 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 ...


9
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 (292 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 ...


10
Geoffrey B Rhoads: Digital watermarks and methods for security documents. Digimarc Corporation, William Y Conwell, Digimarc Corporation, February 5, 2002: US06345104 (285 worldwide citation)

Security documents (e.g. passports, currency, event tickets, and the like) are encoded to convey machine-readable multi-bit binary information (e.g., a digital watermark), usually in a manner not alerting human viewers that such information is present. The documents can be provided with overt or sub ...



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