Patents by Inventor Sébastien Roy

Sébastien Roy 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 camera motion between two image frames
    Patent number: 5751838
    Abstract: A technique for determining the ego-motion between two frames of an image that includes estimating likely values of the translation and rotation and making a five-dimensional search over the space of likely translations and rotations and finding the global minimum at the current motion estimate by a sum of squared differences cost function.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: May 12, 1998
    Assignee: Nec Research Institute, Inc.
    Inventors: Ingemar J. Cox, Sebastien Roy
  • Dynamic histogram warping of image histograms for constant image brightness, histogram matching and histogram specification
    Patent number: 5727080
    Abstract: Dynamic histogram warping is performed on histograms extracted from an image pair of a scene. The warped histograms are remapped to the image pair and the resulting remapped image pair is subsequently subjected to image processing.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: March 10, 1998
    Assignee: NEC Research Institute, Inc.
    Inventors: Ingemar J. Cox, Sebastien Roy
  • Method for the estimation of rotation between two frames via epipolar search for use in a three-dimensional representation
    Patent number: 5644651
    Abstract: A technique for compensating for egomotion of the camera used to record a pair of two-dimensional views of a scene when the pair of images is to be used to provide a three dimensional representation of the scene. The technique involves comparing histograms of the intensity levels of pixels of corresponding epipolar lines in the pair of images for assumed amounts of egomotion to identify the amount that results in the smallest total of the sums of squared differences of the histograms.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: July 1, 1997
    Assignee: NEC Research Institute, Inc.
    Inventors: Ingemar J. Cox, Sebastien Roy