Patents by Inventor Hahn Chung

Hahn Chung 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).

  • Potential field-based gamut mapping
    Patent number: 8520938
    Abstract: A method for adjusting a color in a color space comprises adjusting the color along a gradient path to a point in or on a color gamut. The gradient path is determined from a potential field derived from the color gamut consisting of gamut points in the color space. The potential field can be derived from one or more points in the color gamut and different functions may be used to determine the potentials due to different points in the gamut. The potential at a point in the color space due to the gamut point can be a function, including an inverse power, of distance of the point in the color space from the gamut point. The gradient path can be determined from the gradient of the potential field by quadric error-based surface simplification of a surface mesh representing a surface of the gamut.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: August 27, 2013
    Assignee: Eastman Kodak Company
    Inventors: William A. Rozzi, Hahn Chung, Timothy A. Fischer
  • POTENTIAL FIELD-BASED GAMUT MAPPING
    Publication number: 20120229461
    Abstract: A method for adjusting a color in a color space comprises adjusting the color along a gradient path to a point in or on a color gamut. The gradient path is determined from a potential field derived from the color gamut consisting of gamut points in the color space. The potential field can be derived from one or more points in the color gamut and different functions may be used to determine the potentials due to different points in the gamut. The potential at a point in the color space due to the gamut point can be a function, including an inverse power, of distance of the point in the color space from the gamut point. The gradient path can be determined from the gradient of the potential field by quadric error-based surface simplification of a surface mesh representing a surface of the gamut.
    Type: Application
    Filed: May 17, 2012
    Publication date: September 13, 2012
    Inventors: William A. Rozzi, Hahn Chung, Timothy A. Fischer
  • Potential field-based gamut mapping
    Patent number: 8233705
    Abstract: A method for adjusting a color in a color space comprises adjusting the color along a gradient path to a point in or on a color gamut. The gradient path is determined from a potential field derived from the color gamut consisting of gamut points in the color space. The potential field can be derived from one or more points in the color gamut and different functions may be used to determine the potentials due to different points in the gamut. The potential at a point in the color space due to the gamut point can be a function, including an inverse power, of distance of the point in the color space from the gamut point. The gradient path can be determined from the gradient of the potential field by quadric error-based surface simplification of a surface mesh representing a surface of the gamut.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: July 31, 2012
    Assignee: Eastman Kodak Company
    Inventors: William A. Rozzi, Hahn Chung, Timothy A. Fischer
  • POTENTIAL FIELD-BASED GAMUT MAPPING
    Publication number: 20100086226
    Abstract: A method for adjusting a color in a color space comprises adjusting the color along a gradient path to a point in or on a color gamut. The gradient path is determined from a potential field derived from the color gamut consisting of gamut points in the color space. The potential field can be derived from one or more points in the color gamut and different functions may be used to determine the potentials due to different points in the gamut. The potential at a point in the color space due to the gamut point can be a function, including an inverse power, of distance of the point in the color space from the gamut point. The gradient path can be determined from the gradient of the potential field by quadric error-based surface simplification of a surface mesh representing a surface of the gamut.
    Type: Application
    Filed: October 3, 2008
    Publication date: April 8, 2010
    Inventors: William A. Rozzi, Hahn Chung, Timothy A. Fischer