Patents by Inventor Antonia T. Cheung

Antonia T. Cheung 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).

  • Correction of spatially variant phase error for synthetic aperture radar
    Patent number: 9110167
    Abstract: A method, apparatus, and computer program product is present for focusing an image. A spatial model for spatial variation in phase error is identified for the image. The image is divided into a number of subpatches based on the spatial model. Phase correction is applied to each of the number of subpatches to form a number of focused subpatches. The number of focused subpatches is merged to form a focused image.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: August 18, 2015
    Assignee: THE BOEING COMPANY
    Inventors: Kwang M. Cho, Antonia T. Cheung
  • CORRECTION OF SPATIALLY VARIANT PHASE ERROR FOR SYNTHETIC APERTURE RADAR
    Publication number: 20100086228
    Abstract: A method, apparatus, and computer program product is present for focusing an image. A spatial model for spatial variation in phase error is identified for the image. The image is divided into a number of subpatches based on the spatial model. Phase correction is applied to each of the number of subpatches to form a number of focused subpatches. The number of focused subpatches is merged to form a focused image.
    Type: Application
    Filed: October 7, 2008
    Publication date: April 8, 2010
    Inventors: Kwang M. Cho, Antonia T. Cheung