Patents by Inventor Keith Derek Copsey

Keith Derek Copsey 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).

  • Alignment of synthetic aperture images
    Patent number: 8938130
    Abstract: A method for the alignment of pairs of complex images of a region, such as may be produced by separate passes of a synthetic aperture radar, is disclosed. The method selects a subset of each image in the form of a plurality of tiles, and calculates a correlation value between corresponding pairs of tiles. Shifts in x and y for each pair where the correlation value exceeds a threshold are then used to calculate values for overall shift, stretch and shear to be applied to one of the images to align it with the other. An iterative least squares approach may be used. As both phase and amplitude information is used in the correlation the technique is suitable for aligning images having little intensity variation. The invention may be used to align images prior to coherent change detection analysis of the images.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: January 20, 2015
    Assignee: Qinetiq Limited
    Inventors: Christopher Paul Moate, Keith Derek Copsey
  • ALIGNMENT OF SYNTHETIC APERTURE IMAGES
    Publication number: 20130129253
    Abstract: A method for the alignment of pairs of complex images of a region, such as may be produced by separate passes of a synthetic aperture radar, is disclosed. The method selects a subset of each image in the form of a plurality of tiles, and calculates a correlation value between corresponding pairs of tiles. Shifts in x and y for each pair where the correlation value exceeds a threshold are then used to calculate values for overall shift, stretch and shear to be applied to one of the images to align it with the other. An iterative least squares approach may be used. As both phase and amplitude information is used in the correlation the technique is suitable for aligning images having little intensity variation. The invention may be used to align images prior to coherent change detection analysis of the images.
    Type: Application
    Filed: July 25, 2011
    Publication date: May 23, 2013
    Applicant: QINETIQ LIMITED
    Inventors: Christopher Paul Moate, Keith Derek Copsey