1
Robert D Powell, Mark J Nitzberg: Method and system for digital image signatures. Corbis Corporation, Seed and Berry, February 24, 1998: US05721788 (534 worldwide citation)

A method and system for embedding signatures within visual images in both digital representation and print or film. A signature is inseparably embedded within the visible image, the signature persisting through image transforms that include resizing as well as conversion to print or film and back to ...


2
Robert D Powell, Mark J Nitzberg: Method for encoding auxiliary data within a source signal. Digimarc Corporation, Klarquist Sparkman Campbell Leigh & Whinston, September 15, 1998: US05809160 (223 worldwide citation)

A method and system for embedding signatures within visual images in both digital representation and print or film. A signature is inseparably embedded within the visible image, the signature persisting through image transforms that include resizing as well as conversion to print or film and back to ...


3
Robert D Powell, Mark J Nitzberg: Method for image encoding. Digimarc Corporation, Klarquist Sparkman Campbell Leigh & Whinston, July 27, 1999: US05930377 (166 worldwide citation)

A method and system for embedding signatures within visual images in both digital representation and print or film. A signature is inseparably embedded within the possible image, the signature persisting through image transforms that include resizing as well as conversion to print or film and back t ...


4
Robert D Powell, Mark J Nitzberg: Method for encoding auxiliary data within a source signal. Digimarc Corporation, Joel R Meyer, Digimarc Corporation, May 7, 2002: US06385330 (76 worldwide citation)

A method and system for embedding signatures within visual images in both digital representation and print or film. A signature is inseparably embedded within the visible image, the signature persisting through image transforms that include resizing as well as conversion to print or film among the p ...


5
Robert D Powell, Mark J Nitzberg: Image marking with pixel modification. Digimarc Corporation, Joel R Meyer, Digimarc Corporation, September 30, 2003: US06628801 (56 worldwide citation)

A method and system for embedding signatures within visual images in both digital representation and print or film. A signature is inseparably embedded within the visible image, the signature persisting through image transforms that include resizing as well as conversion to print or film and back to ...


6
Robert D Powell, Mark J Nitzberg: Data hiding based on neighborhood attributes. Digimarc Corporation, William Y Digimarc Corporation Conwell, October 24, 2000: US06137892 (38 worldwide citation)

Plural-bit data is encoded in an image without leaving apparent evidence of image alteration. The image is represented by data elements (e.g., pixels) whose values are changed to effect the encoding. The particular data elements to be changed are selected not on their individual values, but rather o ...


7
Robert D Powell, Mark J Nitzberg: Method for image encoding. Digimarc Corporation, William Y Digimarc Corporation Conwell, June 6, 2000: US06072888 (31 worldwide citation)

Plural-bit data is encoded in an image without leaving apparent evidence of image alteration. The image is represented by data elements (e.g., pixels) whose values are changed to effect the encoding. The changes are desirably effected in groups, e.g., pixel groupings 5-10 pixels in height and width, ...


8
Robert D Powell, Mark J Nitzberg: Method for encoding auxiliary data within a source signal. Digimarc Corporation, Joel R Meyer, Digimarc Corporation, October 1, 2002: US06459803 (30 worldwide citation)

A method and system for embedding signatures within visual images in both digital representation and print or film. A signature is inseparably embedded within the visible image, the signature persisting through image transforms that include resizing as well as conversion to print or film among the p ...


9
Robert D Powell, Mark J Nitzberg: Method for encoding auxiliary data within a source signal. Digimarc Corporation, Digimarc Corporation, January 13, 2004: US06678392 (28 worldwide citation)

A method and system for embedding signatures within visual images in both digital representation and print or film. A signature is inseparably embedded within the visible image, the signature persisting through image transforms that include resizing as well as conversion to print or film among the p ...


10
Robert D Powell, Mark Nitzberg: Hiding codes in input data. Digimarc Corporation, July 12, 2011: US07978876 (25 worldwide citation)

The present invention relates to hiding codes in input data, e.g., such as still imagery and motion pictures. One claim recites: embedding an N-bit code with a source signal, N being at least one. The embedding proceeds, for each bit of the N-bit code, according to the following: mapping the bit to ...