Patents by Inventor Anthony Masterson

Anthony Masterson 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 color space conversion
    Patent number: 5818613
    Abstract: A system and method for converting a color represented in a first color space to the color represented in a second color space uses a constant hue algorithm. The constant hue algorithm is used to compensate invalid colors in the second color space obtained as a result of the conversion. The constant hue algorithm determines a compensation factor that, in effect, blends the invalid color with pure grey until the invalid color becomes a valid color in the second color space. The compensation factor is optionally stored with the valid color in the second color space so that the original color in the first color space can be subsequently recovered.
    Type: Grant
    Filed: December 4, 1995
    Date of Patent: October 6, 1998
    Assignee: Silicon Graphics, Inc.
    Inventors: Anthony Masterson, Robert A. Williams, Edward Goldberg, Charles Jerian
  • Apparatus for converting twenty-four bit color to fifteen bit color in a computer output display system
    Patent number: 5469190
    Abstract: Apparatus for converting representations of color pixels in a twenty-four bit color format to representations in a fifteen bit color format including an individual circuit for data representing each component of a color, each of the individual circuits including apparatus for selectively incrementing the value the five highest order bits of a value representing a component of a color, apparatus responsive to a value of the lowest order bits of a value representing a component for providing a signal to cause the apparatus for selectively incrementing the five highest order bits, and apparatus for selectively enabling the apparatus responsive to a value of the lowest order bits depending on a desired pattern of pixels.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: November 21, 1995
    Assignee: Apple Computer, Inc.
    Inventor: Anthony Masterson
  • Apparatus for storing information in and deriving information from a frame buffer
    Patent number: 5241658
    Abstract: An arrangement for storing information to be displayed in a plurality of different pixel formats on a bitmapped output display including apparatus for selecting first positions for storage of information in a first pixel format, apparatus for selecting second positions for storage of information in a second pixel format, apparatus for selecting information from first positions of storage for display in the first pixel format, and apparatus for selecting information from second positions of storage for display in the second pixel format.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: August 31, 1993
    Assignee: Apple Computer, Inc.
    Inventors: Anthony Masterson, William Dawson, Spencer Worley
  • Apparatus and method for improved caching in a computer system
    Patent number: 5073851
    Abstract: A cache management system for a computer system having a central processing unit, a main memory, and cache memory including a memory management unit for transferring page size blocks of information, apparatus for reading information from main memory, apparatus for writing information to the cache memory, and apparatus for overlapping the write of information to the cache memory to occur during the read of information from the main memory.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: December 17, 1991
    Assignee: Apple Computer, Inc.
    Inventors: Anthony Masterson, Mark Krueger