Patents by Inventor Richard Walker Browne

Richard Walker Browne 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).

  • Method and apparatus for quantifying visual showthrough of printed images on the reverse of planar objects
    Patent number: 7620211
    Abstract: An image analysis method to quantify visual showthrough of printed images on the reverse face of planar objects, such as paper. An illumination level is set using a white reference object. A white reference image is stored in a computer memory. An image of a planar object having a printed image on the reverse face is stored in a computer memory. A pixel by pixel ratio of the two images is calculated and a mean value of the ratios is calculated to characterize the visual showthrough. The measurements are substantially independent of both the illumination level and image shading.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: November 17, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Richard Walker Browne, Robert V. Canning, Jr., Michael H. Evans, Robert William Johnson, Barry Rubin, Douglas Ray Stilwell