Patents by Inventor John McElvain

John McElvain 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 patterned encoded halftoning
    Patent number: 7920293
    Abstract: A preferred embodiment reproduces an image by receiving an input contone array of M contone data values. The contone data values may lie within a range from 1 to N. The embodiment includes comparing each contone data value to an array of M sets of pattern look-up tables to generate an array of M pattern values. M may be a number of one or more. Each pattern value in the array of M pattern values may be decoded to a corresponding K by L multi-pixel pattern of binary data. The binary data is rendered by a reprographic device.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: April 5, 2011
    Assignee: Xerox Corporation
    Inventors: John McElvain, Charles Michael Hains
  • System and method for creating patterned encoded halftones
    Patent number: 7583412
    Abstract: An embodiment described below provides a system that allows a user to provide an exact implementation or a close approximation to any desired Holladay dot to a printer with super-resolution encoding (SRE)/decoding (SRD) capabilities. In particular, the embodiment converts a desired Holladay dot to an SRE dot. The SRE dot or SRE look-up table may be uploaded to a printer that supports SRE/SRD.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: September 1, 2009
    Assignee: Xerox Corporation
    Inventors: John McElvain, Charles Michael Hains