Patents by Inventor Katrien Daels

Katrien Daels 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).

  • Moire free multilevel halftoning of color images
    Patent number: 5903713
    Abstract: A halftone screen is presented for use in combination with reproduction devices that are capable of rendering more than two tone levels. The screen is optimized to minimize both tone and color shift in the presence of variations in the printing process. The intermediate density levels, which are assigned to a minority of the microdots within each halftone cell, are different within adjacent halftone cells. FIG.
    Type: Grant
    Filed: May 1, 1996
    Date of Patent: May 11, 1999
    Assignee: Agfa-Gevaert N.V.
    Inventors: Katrien Daels, Paul Delabastita
  • Halftone screen and methods for making and using the same
    Patent number: 5766807
    Abstract: In order to improve the printability of a periodic halftone screen, the amount of growth of the halftone dots in a halftone screen is modulated as a function of tone in a tone selective way that is different for at least two halftone dots.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: June 16, 1998
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Paul Delabastita, Katrien Daels, Johan Van Hunsel, Jan Van Cauwenberge