Patents by Inventor Barry Dydyk

Barry Dydyk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fingerprint classification via spatial frequency components
    Patent number: 6226391
    Abstract: The present invention is a method and apparatus for automatically placing a first unknown image, such as an unknown fingerprint image, into one of a plurality of categories. The invention includes storing in a library a plurality of value series, each of which series is derived from the frequency representation of an image category. The categorization process and apparatus takes the frequency image of a first unknown pattern to create a first frequency image. The frequency image plane of the first (unknown) frequency image is divided into a plurality of frequency image plane regions. Each of the frequency image plane regions may be an angular segment radiating from the origin of the frequency image plane. A region value is assigned to each of the frequency image plane regions based on the total energy in the frequency image in that region. The region values for the first frequency image are combined to generate a first series of region values.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: May 1, 2001
    Assignee: Litton Systems, Inc.
    Inventors: Robert Barry Dydyk, Stuart A. Mills, Phillip Wayne Dennis
  • High output reflective optical correlator having a folded optical axis using ferro-electric liquid crystal spatial light modulators
    Patent number: 6080994
    Abstract: An optical correlator system having a plurality of both active and passive reflective optical components between a source of electromagnetic radiation, such a visible coherent light, and an output detector array in a planar support body along a folded optical axis beam path within the body uses a ferro-electric liquid crystal spatial light modulator as the input sensor and the correlating filter to provide enhanced optical detection of an unknown object at a CCD detector array.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: June 27, 2000
    Assignee: Litton Systems, Inc.
    Inventors: David T. Carrott, Barry Dydyk, James P. Karins, John Lucas, Bob Mitchell, Stuart Mills
  • Fingerprint classification via spatial frequency components
    Patent number: 5953442
    Abstract: The present invention is a method and apparatus for automatically placing a first unknown image, such as an unknown fingerprint image, into one of a plurality of categories. The invention includes storing in a library a plurality of value series, each of which series is derived from the frequency representation of an image category. The categorization process and apparatus takes the frequency image of a first unknown pattern to create a first frequency image. The frequency image plane of the first (unknown) frequency image is divided into a plurality of frequency image plane regions. Each of the frequency image plane regions may be an angular segment radiating from the origin of the frequency image plane. A region value is assigned to each of the frequency image plane regions based on the total energy in the frequency image in that region. The region values for the first frequency image are combined to generate a first series of region values.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: September 14, 1999
    Assignee: Litton Systems, Inc.
    Inventors: Robert Barry Dydyk, Stuart A. Mills, Phillip Wayne Dennis