Patents by Inventor Roxanna F. Rochat

Roxanna F. Rochat 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).

  • Patent number: 5334992
    Abstract: An interface system allows a user to select and control colors used in graphic images generated by a computer system. The interface system employs graphical representations of the hue, chroma, and lightness combinations capable of being rendered by a computer graphics system. In a preferred embodiment, the graphical representation includes a one-dimensional graph (40) depicting the range of hues and a two-dimensional graph (42) depicting the range of chroma and value combinations available for a selected hue. The graphical representations are preferably rendered in accordance with a Hue-Value-Chroma ("HVC") color space (90) having a high degree of perceptual uniformity.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: August 2, 1994
    Assignee: Tektronix, Inc.
    Inventors: Roxanna F. Rochat, Joann M. Taylor, Novia A. Weiman
  • Patent number: 4985853
    Abstract: A method and apparatus for reversibly transforming color, which is selected from a gamut of colors producible by the primaries of a color display device (20), into a perceptually uniform color space. The coordinates of the color space are readily convertible into internationally accepted standards for color measurement. Also provided, is a method for transforming the color space coordinates of a selected color into the corresponding relative primary intensity levels of the display device (20).
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: January 15, 1991
    Assignee: Tektronix, Inc.
    Inventors: Joann M. Taylor, Paul A. McManus, Gerald M. Murch, Roxanna F. Rochat, Novia A. Weiman
  • Patent number: 4843573
    Abstract: A method and apparatus for reversibly transforming color, which is selected from a gamut of colors producible by the primaries of a color display device (20), into a perceptually uniform color space. The coordinates of the color space are readily convertible into internationally accepted standards for color measurement. Also provided, is a method for transforming the color space coordinates of a selected color into the corresponding relative primary intensity levels of the display device (20).
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: June 27, 1989
    Assignee: Tektronix, Inc.
    Inventors: Joann M. Taylor, Paul A. McManus, Gerald M. Murch, Roxanna F. Rochat, Novia A. Weiman