Patents by Inventor Matthew T. Calef

Matthew T. Calef 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).

  • Sparse phase unwrapping
    Patent number: 11635510
    Abstract: Sparse phase unwrapping is disclosed. A first image and a second image are received. The first image and the second image are coregistered. The first image and the second image comprise respective phase data. An unwrapped interferogram is generated, including by solving an optimization problem using a nonconvex penalty function, where minimizing the penalty function produces sparse minimizers.
    Type: Grant
    Filed: October 8, 2020
    Date of Patent: April 25, 2023
    Assignee: Descartes Labs, Inc.
    Inventors: Rick S. Chartrand, Matthew T. Calef
  • Sparse phase unwrapping
    Patent number: 10852421
    Abstract: Sparse phase unwrapping is disclosed. A first image and a second image are received. The first image and the second image are coregistered. The first image and the second image comprise respective phase data. An unwrapped interferogram is generated, including by solving an optimization problem using a nonconvex penalty function, where minimizing the penalty function produces sparse minimizers.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: December 1, 2020
    Assignee: Descartes Labs, Inc.
    Inventors: Rick S. Chartrand, Matthew T. Calef