Patents by Inventor Ralph Flatau

Ralph Flatau 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).

  • Digital radiography with image brightness and contrast normalization
    Patent number: 4868651
    Abstract: A process for enhancing a still video image can correct digital fluoroscopy images which are under- or overexposed and have their image brightness values concentrated to one end of the gray scale. A pixel histogram is formed, but is clipped at a low value. Then, a cumulative histogram is formed from the clipped histogram. The cumulative histogram, which has a generally linear slope, is normalized and is used for mapping the brightness of luminance values of the original image. The new values form an optimal video image with the gray scale values spread over the entire range. The image shows details not only in the middle gray areas, but in the light and dark areas as well.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: September 19, 1989
    Assignee: S&S Inficon, Inc.
    Inventors: Tzeyang J. Chou, Marshall Ma, Ralph Flatau, Fred Elderbroom
  • Apparatus and method for measuring blood constituents
    Patent number: 4863265
    Abstract: An apparatus for noninvasive determination of constituent concentrations utilizing light wave absorption measurements and methods for processing signals generated by such measurements.
    Type: Grant
    Filed: October 16, 1987
    Date of Patent: September 5, 1989
    Assignee: Mine Safety Appliances Company
    Inventors: Ronald J. Flower, Robert W. Olsen, Michael A. Van Ells, Ralph Flatau