Patents by Inventor Chinh X. Nguyen

Chinh X. Nguyen 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).

  • Dynamic range compression
    Patent number: 6973218
    Abstract: A method and apparatus for processing image data is described, comprising acquiring a frame of image data and compressing the dynamic range of the frame of image data using a dynamic range compression (DRC) algorithm that utilizes down-sampling, median filtering, and up-sampling. The DRC algorithm comprises down-sampling a frame of image data comprising a first array of pixels to generate a second array of pixels, applying a first median filter to the second array of pixels to generate a blurred array of pixels, up-sampling the blurred array of pixels, and removing at least a portion of low-frequency gradient data generated by previous steps from the frame of image data.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: December 6, 2005
    Assignee: Lockheed Martin Corporation
    Inventors: Timothy Alderson, Gene D. Tener, Valete C. Hopkins, Charlie W. Stuart, Chinh X. Nguyen
  • Dynamic range compression
    Publication number: 20020159648
    Abstract: A method and apparatus for processing image data is described, comprising acquiring a frame of image data and compressing the dynamic range of the frame of image data using a dynamic range compression (DRC) algorithm that utilizes down-sampling, median filtering, and up-sampling. The DRC algorithm comprises down-sampling a frame of image data comprising a first array of pixels to generate a second array of pixels, applying a first median filter to the second array of pixels to generate a blurred array of pixels, up-sampling the blurred array of pixels, and removing at least a portion of low-frequency gradient data generated by previous steps from the frame of image data.
    Type: Application
    Filed: April 25, 2001
    Publication date: October 31, 2002
    Inventors: Timothy Alderson, Gene D. Tener, Valete C. Hopkins, Charlie W. Stuart, Chinh X. Nguyen