Patents by Inventor Ruixia Xu

Ruixia 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).

  • Gamma adjustment for maximizing information in images
    Patent number: 8538145
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, are described for transforming an image at least in part by using a gamma transformation that maximizes information in the transformed image. In one aspect, a digital image is received and brightness of the digital image is determined. The brightness of the digital image can include luminance or color. Maximum available detail in the digital image is brought out at least in part by applying to the brightness of the digital image a first gamma exponent that is equal to one divided by a negative of an average logarithm of the brightness of the digital image.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: September 17, 2013
    Assignee: Apple Inc.
    Inventors: Graham Finlayson, Ruixia Xu
  • Gamma Adjustment for Maximizing Information in Images
    Publication number: 20120114236
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, are described for transforming an image at least in part by using a gamma transformation that maximizes information in the transformed image. In one aspect, a digital image is received and brightness of the digital image is determined. The brightness of the digital image can include luminance or color. Maximum available detail in the digital image is brought out at least in part by applying to the brightness of the digital image a first gamma exponent that is equal to one divided by a negative of an average logarithm of the brightness of the digital image.
    Type: Application
    Filed: May 19, 2011
    Publication date: May 10, 2012
    Applicant: APPLE INC.
    Inventors: Graham Finlayson, Ruixia Xu