Patents by Inventor Bonaventure Karuta

Bonaventure Karuta 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).

  • System and method for adaptive contrast enhancement of video signals
    Patent number: 8154663
    Abstract: A method for contrast enhancement of a video signal comprises receiving a video signal frame, gathering statistics about the video signal frame, calculating the effective input dynamic range of the video signal frame, calculating the effective output dynamic range of the video signal frame, and constructing a transform to enhance the picture in the video signal frame by mapping the effective input dynamic range to the effective output dynamic range via the transform.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: April 10, 2012
    Assignee: Sigma Designs, Inc.
    Inventors: Yunwei Jia, Bonaventure Karuta
  • System and method for adaptive contrast enhancement of video signals
    Publication number: 20080170798
    Abstract: A method for contrast enhancement of a video signal comprises receiving a video signal frame, gathering statistics about the video signal frame, calculating the effective input dynamic range of the video signal frame, calculating the effective output dynamic range of the video signal frame, and constructing a transform to enhance the picture in the video signal frame by mapping the effective input dynamic range to the effective output dynamic range via the transform.
    Type: Application
    Filed: January 16, 2007
    Publication date: July 17, 2008
    Inventors: Yunmei Jia, Bonaventure Karuta
  • System and method for correcting multiple axis displacement distortion
    Patent number: 7352913
    Abstract: A system and method for correcting distortion in projected images caused by the projection of an input image by a projector lens onto a projection screen having a surface that is not orthogonal to the projection axis of the projector. Projection parameters including the focal length of the projector lens and the angles that represent the pan, tilt and roll angle of the projector are obtained. Then the projected area and the best viewable rectangular area that fits within said projected area is determined. The distortion is then characterized by using a distortion transformation which corresponds to the transformation that exists between the vertices of the best viewable rectangular area and the corresponding vertices of the projected area. Finally, the distortion transformation is inverted and applied to input image to obtain a distortion free projected image.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: April 1, 2008
    Assignee: Silicon Optix Inc.
    Inventors: Bonaventure Karuta, Louie Lee
  • System and method for correcting multiple axis displacement distortion
    Publication number: 20030043303
    Abstract: A system and method for correcting distortion in projected images caused by the projection of an input image by a projector lens onto a projection screen having a surface that is not orthogonal to the projection axis of the projector. Projection parameters including the focal length of the projector lens and the angles that represent the pan, tilt and roll angle of the projector are obtained. Then the projected area and the best viewable rectangular area that fits within said projected area is determined. The distortion is then characterized by using a distortion transformation which corresponds to the transformation that exists between the vertices of the best viewable rectangular area and the corresponding vertices of the projected area. Finally, the distortion transformation is inverted and applied to input image to obtain a distortion free projected image.
    Type: Application
    Filed: June 12, 2002
    Publication date: March 6, 2003
    Inventors: Bonaventure Karuta, Louie Lee