Patents by Inventor Mike Callahan

Mike Callahan 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).

  • Semiautomatic keystone correction system and method
    Patent number: 7380946
    Abstract: The invention relates to a semiautomatic keystone correction system and method. The system includes an interface and a controller. A user selects a plurality of corners within an image projected on a projection surface using the interface and the controller predistorts the image responsive to the selected plurality of corners where the predistorted image exhibits no distortion when re projected on the projection surface. The user further aligns a center of the image with a center of the projection surface, also using the interface. The controller predistorts the image by scaling the image in vertical and horizontal directions using vertical and horizontal scalars, respectively.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: June 3, 2008
    Assignee: Pixelworks, Inc.
    Inventors: Tianbing Brian Teng, Mike Callahan