Mark J Nitzberg

US Patent:

6385330, May 7, 2002

Filed:

Aug 28, 2001

Appl. No.:

09/941365

Inventors:

Robert D. Powell - Issaquah WA
Mark J. Nitzberg - Cambridge MA

Assignee:

Digimarc Corporation - Tualatin OR

International Classification:

H04K 100

US Classification:

382100, 713176

Abstract:

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 pixels of an original image. The pixel values of the signature points and surrounding pixels are adjusted by an amount detectable by a digital scanner. The adjusted signature points form a digital signature which is stored for future identification of subject images derived from the image. In one embodiment, a signature is embedded within an image by locating relative extrema in the continuous space of pixel values and selecting the signature points from among the extrema. Preferably, the signature is redundantly embedded in the image such that any of the redundant representations can be used to identify the signature. Identification of a subject image includes ensuring that the subject image is normalized with respect to the original image or the signed image.

US Patent:

6459803, Oct 1, 2002

Filed:

Apr 11, 2001

Appl. No.:

09/829980

Inventors:

Robert D. Powell - Issaquah WA
Mark J. Nitzberg - Cambridge MA

Assignee:

Digimarc Corporation - Tualatin OR

International Classification:

H04K 100

US Classification:

382100

Abstract:

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 pixels of an original image. The pixel values of the signature points and surrounding pixels are adjusted by an amount detectable by a digital scanner. The adjusted signature points form a digital signature which is stored for future identification of subject images derived from the image. In one embodiment, a signature is embedded within an image by locating relative extrema in the continuous space of pixel values and selecting the signature points from among the extrema. Preferably, the signature is redundantly embedded in the image such that any of the redundant representations can be used to identify the signature. Identification of a subject image includes ensuring that the subject image is normalized with respect to the original image or the signed image.

US Patent:

6614915, Sep 2, 2003

Filed:

Jun 13, 2002

Appl. No.:

10/172353

Inventors:

Robert D. Powell - Vashon WA
Mark J. Nitzberg - Cambridge MA

Assignee:

Digimarc Corporation - Tualatin OR

International Classification:

H04K 100

US Classification:

382100

Abstract:

A digital image is scanned to generate image data, which is processed to steganographically embed plural-bit auxiliary data. The system is useful, e. g. , for capturing and marking digital images without noticeably changing their visual appearance.

US Patent:

6628801, Sep 30, 2003

Filed:

Oct 12, 1999

Appl. No.:

09/417153

Inventors:

Robert D. Powell - Issaquah WA
Mark J. Nitzberg - Cambridge MA

Assignee:

Digimarc Corporation - Tualatin OR

International Classification:

H04K 100

US Classification:

382100, 380 54

Abstract:

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 digital form. Signature points are selected from among the pixels of an original image. The pixel values of the signature points and surrounding pixels are adjusted by an amount detectable by a digital scanner. The adjusted signature points form a digital signature which is stored for future identification of subject images derived from the image. In one embodiment, a signature is embedded within an image by locating relative extrema in the continuous space of pixel values and selecting the signature points from among the extrema. Preferably, the signature is redundantly embedded in the image such that any of the redundant representations can be used to identify the signature. Identification of a subject image includes ensuring that the subject image is normalized with respect to the original image or the signed image.

US Patent:

6678392, Jan 13, 2004

Filed:

Jul 25, 2001

Appl. No.:

09/916216

Inventors:

Robert D. Powell - Vashon WA
Mark J. Nitzberg - Cambridge MA

Assignee:

Digimarc Corporation - Tualatin OR

International Classification:

H04K 100

US Classification:

382100, 713176

Abstract:

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 pixels of an original image. The pixel values of the signature points and surrounding pixels are adjusted by an amount detectable by a digital scanner. The adjusted signature points form a digital signature which is stored for future identification of subject images derived from the image. In one embodiment, a signature is embedded within an image by locating relative extrema in the continuous space of pixel values and selecting the signature points from among the extrema. Preferably, the signature is redundantly embedded in the image such that any of the redundant representations can be used to identify the signature. Identification of a subject image includes ensuring that the subject image is normalized with respect to the original image or the signed image.

US Patent:

7068811, Jun 27, 2006

Filed:

Mar 27, 2002

Appl. No.:

10/113398

Inventors:

Robert D. Powell - Vashon WA, US
Mark Nitzberg - Cambridge MA, US

International Classification:

H04K 1/00

US Classification:

382100

Abstract:

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 pixels of an original image. The pixel values of the signature points and surrounding pixels are adjusted by an amount detectable by a digital scanner. The adjusted signature points form a digital signature which is stored for future identification of subject images derived from the image. In one embodiment, a signature is embedded within an image by locating relative extrema in the continuous space of pixel values and selecting the signature points from among the extrema. Preferably, the signature is redundantly embedded in the image such that any of the redundant representations can be used to identify the signature. Identification of a subject image includes ensuring that the subject image is normalized with respect to the original image or the signed image.

US Patent:

7817855, Oct 19, 2010

Filed:

Sep 5, 2006

Appl. No.:

11/516147

Inventors:

Alan Yuille - Los Angeles CA, US
Xiangrong Chen - Sunnyvale CA, US
Stellan Lagerstrom - Burlingame CA, US
Daniel Terry - New York NY, US
Mark Nitzberg - Oakland CA, US

Assignee:

The Blindsight Corporation - Berkeley CA

International Classification:

G06K 9/34

US Classification:

382176, 382227

Abstract:

A method and apparatus for detecting text in real-world images comprises calculating a cascade of classifiers, the cascade comprising a plurality of stages, each stage including one or more weak classifiers, the plurality of stages organized to start out with classifiers that are most useful for ruling out non-text regions, and removing regions classified as non-text regions from the cascade prior to completion of the cascade, to further speed up processing.

US Patent:

20020038076, Mar 28, 2002

Filed:

Nov 14, 2001

Appl. No.:

10/002768

Inventors:

David Sheehan - Poway CA, US
Mark Nitzberg - Cambridge MA, US
Patrick Fitzgerald - San Diego CA, US

International Classification:

A61B001/267

US Classification:

600/200000

Abstract:

A portable data collection device is provided for diagnostic image and data collection at a remote location. The device is implemented as an otoscope including a speculum and light source for illumination of the ear canal. A digital camera element collects the reflected images and provides the images to a processor. The processor processes the images using pattern matching techniques and displays and/or stores suitable images. The images are transferred to a base station for subsequent transmission to a remote server or computer, where an authorized party may access and examine the images. An authorization or prescription from the remote server or computer may be required to enable data collection and transmission by the otoscope.