Patents by Inventor Qionghai Dai

Qionghai Dai 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).

  • Patent number: 8866972
    Abstract: A method for transmitting spectrum information is provided. The method includes: sampling a first video of a scene by a first sampling device and sampling a spectrum video of a sampling point in the scene by a second sampling device, and processing the spectrum video to obtain a spectrum information of the sampling point; calculating estimated transmission ratio coefficients of the spectrum video according to color integral curves of the first sampling device; estimating a location of the sampling point in each frame of the first video; and transmitting the spectrum information of the sampling point to a plurality of scene points in the first video according to the estimated transmission ratio coefficients and the location of the sampling point in each frame of the spectrum video through a trilateral filtering algorithm.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: October 21, 2014
    Assignee: Tsinghua University
    Inventors: Qionghai Dai, Chenguang Ma, Jinli Suo
  • Patent number: 8335371
    Abstract: A method for vision field computing may comprise the following steps of: forming a sampling system for a multi-view dynamic scene; controlling cameras in the sampling system for the multi-view dynamic scene to perform spatial interleaved sampling, temporal interleaved exposure sampling and exposure-variant sampling; performing spatial intersection to the sampling information in the view subspace of the dynamic scene and temporal intersection to the sampling information in the time subspace of the dynamic scene to reconstruct a dynamic scene geometry model; performing silhouette back projection based on the dynamic scene geometry model to obtain silhouette motion constraints for the view angles of the cameras; performing temporal decoupling for motion de-blurring with the silhouette motion constraints; and reconstructing a dynamic scene 3D model with a resolution larger than nominal resolution of each camera by a 3D reconstructing algorithm.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: December 18, 2012
    Assignee: Tsinghua University
    Inventors: Qionghai Dai, Di Wu, Yebin Liu
  • Publication number: 20110285822
    Abstract: A method and a related system of free-view relighting for a dynamic scene based on photometric stereo, the method including the steps of: 1) performing multi-view dynamic videos of an object using a multi-view camera array under a predetermined controllable varying illumination; 2) obtaining a three-dimensional shape model and surface reflectance peculiarities of the object; 3) obtaining a static relighted three-dimensional model of the object and a three-dimensional trajectory of the object; 4) obtaining a dynamic relighted three-dimensional model; and 5) performing a free-view dependent rendering to the dynamic relighted three-dimensional model of the object.
    Type: Application
    Filed: May 23, 2011
    Publication date: November 24, 2011
    Applicant: TSINGHAU UNIVERSITY
    Inventors: Qionghai DAI, Guannan LI
  • Publication number: 20110158507
    Abstract: A method for vision field computing may comprise the following steps of: forming a sampling system for a multi-view dynamic scene; controlling cameras in the sampling system for the multi-view dynamic scene to perform spatial interleaved sampling, temporal interleaved exposure sampling and exposure-variant sampling; performing spatial intersection to the sampling information in the view subspace of the dynamic scene and temporal intersection to the sampling information in the time subspace of the dynamic scene to reconstruct a dynamic scene geometry model; performing silhouette back projection based on the dynamic scene geometry model to obtain silhouette motion constraints for the view angles of the cameras; performing temporal decoupling for motion de-blurring with the silhouette motion constraints; and reconstructing a dynamic scene 3D model with a resolution larger than nominal resolution of each camera by a 3D reconstructing algorithm.
    Type: Application
    Filed: December 27, 2010
    Publication date: June 30, 2011
    Applicant: Tsinghua University
    Inventors: Qionghai DAI, Di Wu, Yebin Liu