Patents by Inventor Lihao Xu

Lihao Xu 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).

  • Color gamut mapping method and apparatus
    Patent number: 11212422
    Abstract: A color gamut mapping method and apparatus, includes obtaining a to-be-processed image, obtaining lightness and chroma information of a target color gamut, and mapping a lightness value and a chroma value of a pixel in the to-be-processed image to obtain a processed image corresponding to the target color gamut, where a pixel in the processed image has a mapped lightness value and a mapped chroma value, and the mapped lightness value and the mapped chroma value are obtained by mapping the lightness value and the chroma value of the pixel in a color gamut of the to-be-processed image to the target color gamut using a point with a minimum lightness value in the target color gamut as a mapping end point.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: December 28, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Ming Ronnier Luo, Lihao Xu, Lixian Li
  • Color Gamut Mapping Method and Apparatus
    Publication number: 20210006686
    Abstract: A color gamut mapping method and apparatus, includes obtaining a to-be-processed image, obtaining lightness and chroma information of a target color gamut, and mapping a lightness value and a chroma value of a pixel in the to-be-processed image to obtain a processed image corresponding to the target color gamut, where a pixel in the processed image has a mapped lightness value and a mapped chroma value, and the mapped lightness value and the mapped chroma value are obtained by mapping the lightness value and the chroma value of the pixel in a color gamut of the to-be-processed image to the target color gamut using a point with a minimum lightness value in the target color gamut as a mapping end point.
    Type: Application
    Filed: September 24, 2020
    Publication date: January 7, 2021
    Inventors: Ming Ronnier Luo, Lihao Xu, Lixian Li
  • Method of resource-efficient and scalable streaming media distribution for asynchronous receivers
    Patent number: 6823394
    Abstract: A method of distributing streaming media to one or more users. The method includes partitioning the media into segments that each include data associated with at least a portion of one or more of the successive data units in the media. Each segment also includes information for positioning the data relative to the order of the data units. A transmission sequence having a plurality of successive time slots is defined for the segments to enable reconstruction of an i-th data unit from Li segments. A server transmits each of the segments according to the defined transmission sequence during one of the time slots. A client processes the transmitted segments based on the positioning information to reconstruct the media.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: November 23, 2004
    Assignee: Washington University
    Inventors: Marcel Waldvogel, Lihao Xu, Ramaprabhu Janakiraman
  • Method of resource-efficient and scalable streaming media distribution for asynchronous receivers
    Publication number: 20020107969
    Abstract: A method of distributing streaming media to one or more users. The method includes partitioning the media into segments that each include data associated with at least a portion of one or more of the successive data units in the media. Each segment also includes information for positioning the data relative to the order of the data units. A transmission sequence having a plurality of successive time slots is defined for the segments to enable reconstruction of an i-th data unit from Li segments. A server transmits each of the segments according to the defined transmission sequence during one of the time slots. A client processes the transmitted segments based on the positioning information to reconstruct the media.
    Type: Application
    Filed: December 12, 2000
    Publication date: August 8, 2002
    Inventors: Marcel Waldvogel, Lihao Xu, Ramaprabhu Janakiraman
  • Reliable array of distributed computing nodes
    Patent number: 6128277
    Abstract: A system which uses redundant storage and redundant communication to provide a robust distributed server system.
    Type: Grant
    Filed: December 2, 1999
    Date of Patent: October 3, 2000
    Inventors: Joshua Bruck, Vasken Bohossian, Chenggong Fan, Paul LeMahieu, Marcus David Daniel Riedel, Lihao Xu
  • Reliable array of distributed computing nodes
    Patent number: 6088330
    Abstract: A system which uses redundant storage and redundant communication to provide a robust distributed server system.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: July 11, 2000
    Inventors: Joshua Bruck, Vasken Bohossian, Chenggong Fan, Paul LeMahieu, Marcus David Daniel Riedel, Lihao Xu