Patents by Inventor Yen F. Cheu

Yen F. Cheu 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).

  • Sinography method and apparatus
    Patent number: 5210688
    Abstract: Tomography apparatus is used to irradiate a body cross section and acquire a relatively small amount of data which is mapped into a two dimensional array or sinogram and image enhancement techniques are applied to the sinogram to reveal visible lines representing flaws. An array processor operates on the sinogram to perform edge enhancement and averaging convolutions, a fast Fourier transform, low pass filtering in frequency domain, and an inverse fast Fourier transform to generate the enhanced sinogram.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: May 11, 1993
    Assignee: General Motors Corporation
    Inventors: Yen F. Cheu, August F. Scarpelli