Patents by Inventor X. Long Dai

X. Long 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).

  • System and method for registering complex images
    Patent number: 6873354
    Abstract: A system and method are described for an image registration system and method including a registration engine that receives complex image data for corresponding images. The registration engine generates a correlation map between the complex image pair for relative translation by calculating an inverse of the complex conjugate product of the frequency data of the first image and the frequency domain data of the second, corresponding, image. The frequency domain data may be obtained using Fast Fourier transform-based techniques.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: March 29, 2005
    Assignee: nLine Corporation
    Inventors: X. Long Dai, Martin A. Hunt, Bichuan Shen
  • System and method for acquiring and processing complex images
    Publication number: 20040179738
    Abstract: In digital holographic imaging systems, streamed holograms are compared on a pixel-by-pixel basis for defect detection after hologram generation. An automated image matching, registration and comparison method with feedback confidence allows for runtime wafer inspection, scene matching refinement, rotational wafer alignment and the registration and comparison of difference images.
    Type: Application
    Filed: September 12, 2003
    Publication date: September 16, 2004
    Inventors: X. Long Dai, Ayman El-Khashab, Martin A. Hunt, Mark Schulze, Clarence E. Thomas, Edgar Voelkl
  • System and method for registering complex images
    Publication number: 20040174437
    Abstract: A system and method are described for an image registration system and method including a registration engine that receives complex image data for corresponding images. The registration engine generates a correlation map between the complex image pair for relative translation by calculating an inverse of the complex conjugate product of the frequency data of the first image and the frequency domain data of the second, corresponding, image. The frequency domain data may be obtained using Fast Fourier transform-based techniques.
    Type: Application
    Filed: September 7, 2001
    Publication date: September 9, 2004
    Applicant: NLINE CORPORATION
    Inventors: X. Long Dai, Martin A. Hunt, Bichuan Shen
  • System and method for correlated noise removal in complex imaging systems
    Patent number: 6763142
    Abstract: In the present disclosure a system and method are described for removing fixed pattern noise. The system includes a positioning system for holding and positioning a target, an optical system for capturing images or the target, and a fixed pattern noise removal engine for identifying and removing fixed pattern noise. The fixed pattern noise removal engine preferably identifies fixed pattern noise by analyzing a reference image and target image.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: July 13, 2004
    Assignee: nLine Corporation
    Inventors: X. Long Dai, Martin A. Hunt
  • System and method for correlated noise removal in complex imaging systems
    Publication number: 20030048957
    Abstract: In the present disclosure a system and method are described for removing fixed pattern noise. The system includes a positioning system for holding and positioning a target, an optical system for capturing images or the target, and a fixed pattern noise removal engine for identifying and removing fixed pattern noise. The fixed pattern noise removal engine preferably identifies fixed pattern noise by analyzing a reference image and target image.
    Type: Application
    Filed: September 7, 2001
    Publication date: March 13, 2003
    Applicant: NLINE CORPORATION
    Inventors: X. Long Dai, Martin A. Hunt