Patents by Inventor Changpeng DING

Changpeng DING 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).

  • Method for rendering on basis of hemispherical orthogonal function
    Patent number: 11989823
    Abstract: The invention discloses a method for rendering on the basis of hemispherical orthogonal function, the method comprising the following steps: selecting rendering fragments and establishing a local coordinate system; acquiring a bidirectional reflectance distribution function of a material; if global illumination is an orthogonal function, determining a rotation matrix of an orthogonal function coefficient according to the rotation angles of the global coordinate system and the local coordinate system, and calculating a local orthogonal function illumination coefficient; converting the local orthogonal function illumination coefficient into a hemispherical orthogonal function illumination coefficient; sampling to obtain the spatial distribution of a bidirectional reflection distribution function of a rendered material; obtaining a hemispherical orthogonal function of the bidirectional reflection distribution function of the rendered material; and using the dot product of a hemispherical orthogonal function coef
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: May 21, 2024
    Assignee: NANJING INSTITUTE OF ASTRONOMICAL OPTICS & TECHNOLOGY, NATIONAL ASTRONOMICAL OBSERVATORIES, CAS
    Inventors: Yi Zheng, Kai Wei, Bin Liang, Ying Li, Changpeng Ding
  • METHOD FOR RENDERING ON BASIS OF HEMISPHERICAL ORTHOGONAL FUNCTION
    Publication number: 20220406006
    Abstract: The invention discloses a method for rendering on the basis of hemispherical orthogonal function, the method comprising the following steps: selecting rendering fragments and establishing a local coordinate system; acquiring a bidirectional reflectance distribution function of a material; if global illumination is an orthogonal function, determining a rotation matrix of an orthogonal function coefficient according to the rotation angles of the global coordinate system and the local coordinate system, and calculating a local orthogonal function illumination coefficient; converting the local orthogonal function illumination coefficient into a hemispherical orthogonal function illumination coefficient; sampling to obtain the spatial distribution of a bidirectional reflection distribution function of a rendered material; obtaining a hemispherical orthogonal function of the bidirectional reflection distribution function of the rendered material; and using the dot product of a hemispherical orthogonal function coef
    Type: Application
    Filed: September 14, 2020
    Publication date: December 22, 2022
    Inventors: Yi ZHENG, Kai WEI, Bin LIANG, Ying LI, Changpeng DING