Patents by Inventor Thomas H. Willwacher

Thomas H. Willwacher 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).

  • PROJECTING WARPED IMAGES ONTO CURVED SURFACES
    Publication number: 20040184013
    Abstract: A method projects one or more image onto a curved display surface. First, a predetermined structured light pattern is projected onto the display surface. A stereo pair of images is acquired of the projected images on the display surface. Then, a quadric transfer function between the predetermined images and the stereo pair of images, via the display surface, is determined. Thus, an arbitrary output image can be warped according to the quadric transfer function so that when it is projected onto the display surface it appears correct.
    Type: Application
    Filed: June 10, 2003
    Publication date: September 23, 2004
    Inventors: Ramesh Raskar, Jeroen van Baar, Srinivasa G. Rao, Thomas H. Willwacher
  • Projecting warped images onto curved surfaces
    Patent number: 6793350
    Abstract: A method projects one or more image onto a curved display surface. First, a predetermined structured light pattern is projected onto the display surface. A stereo pair of images is acquired of the projected images on the display surface. Then, a quadric transfer function between the predetermined images and the stereo pair of images, via the display surface, is determined. Thus, an arbitrary output image can be warped according to the quadric transfer function so that when it is projected onto the display surface it appears correct.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: September 21, 2004
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Ramesh Raskar, Jeroen van Baar, Srinivasa G. Rao, Thomas H. Willwacher
  • Method for determining a largest inscribed rectangular image within a union of projected quadrilateral images
    Patent number: 6729733
    Abstract: A method determines a largest rectangle on a display surface. A polygon L is drawn on a first depth plane having a depth z=1 in a depth buffer. A rectangle R is drawn with a predetermined aspect ratio on a second depth plane having a depth z=0. A center of projection is determined with a minimum depth z in a range [0,1] that maps the rectangle R into a largest rectangle S in the first depth plane so that the rectangle S remains completely inside the polygon L.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: May 4, 2004
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Ramesh Raskar, Thomas H. Willwacher, Jeroen van Baar
  • Method and system for displaying images on curved surfaces
    Patent number: 6715888
    Abstract: A method displays an image on a display surface. First, structured patterns are projected on the display surface by multiple projectors Pi. Input images of the structured pattern are acquired. Each input image is acquired by a camera Ci in a fixed physical relationship to a corresponding one of the projectors. The correspondences are triangulated to determine a quadric transfer TPiCk. Quadric transfer parameters are determined of the quadric transfer T. Output images from the projectors are warped according to the quadric transfer and the quadric transfer parameters.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: April 6, 2004
    Assignee: Mitsubishi Electric Research Labs, Inc
    Inventors: Ramesh Raskar, Thomas H. Willwacher, Jeroen van Baar
  • Shape-adaptive projector system
    Patent number: 6709116
    Abstract: A method adapts an output image to a shape of a display surface. First, a structured pattern is projected onto the display surface by a projector. An input image of the structured pattern is acquired by a camera in a fixed physical relationship to the projector. From the input image, a mesh of the structured pattern is determined in a coordinate frame of the projector. Coordinates of a texture are determined in the coordinate frame of the projector. The coordinates of the texture are updated according to the display region. The texture then mapped to the mesh, and the textured mesh is rendered on the display surface.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: March 23, 2004
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Ramesh Raskar, Thomas H. Willwacher, Scrinivasa G. Rao