Patents by Inventor Eric Francois Xavier DUJARDIN

Eric Francois Xavier DUJARDIN 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: 9432590
    Abstract: One embodiment of the present invention sets forth a technique for reducing flicker in image frames captured with a rolling shutter. A flicker detection and correction engine selects a first channel from a first image frame for processing. The flicker detection and correction engine subtracts each pixel value in the first channel from a corresponding pixel value in a prior image frame to generate a difference image frame. The flicker detection and correction engine identifies a first alternating current (AC) component based on a discrete cosine transform (DCT) associated with the difference image frame. The flicker detection and correction engine reduces flicker that is present in the first image frame based on the first AC component. One advantage of the disclosed techniques is that the flicker resulting from fluctuating light sources is correctly detected and reduced or eliminated irrespective of the frequency of the fluctuating light source.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: August 30, 2016
    Assignee: NVIDIA Corporation
    Inventors: Hugh Phu Nguyen, Yining Deng, Eric Francois Xavier Dujardin, Abhinav Sinha
  • Publication number: 20150207975
    Abstract: One embodiment of the present invention sets forth a technique for reducing flicker in image frames captured with a rolling shutter. A flicker detection and correction engine selects a first channel from a first image frame for processing. The flicker detection and correction engine subtracts each pixel value in the first channel from a corresponding pixel value in a prior image frame to generate a difference image frame. The flicker detection and correction engine identifies a first alternating current (AC) component based on a discrete cosine transform (DCT) associated with the difference image frame. The flicker detection and correction engine reduces flicker that is present in the first image frame based on the first AC component. One advantage of the disclosed techniques is that the flicker resulting from fluctuating light sources is correctly detected and reduced or eliminated irrespective of the frequency of the fluctuating light source.
    Type: Application
    Filed: January 22, 2014
    Publication date: July 23, 2015
    Applicant: NVIDIA CORPORATION
    Inventors: Hugh Phu NGUYEN, Yining DENG, Eric Francois Xavier DUJARDIN, Abhinav SINHA