Patents by Inventor John A. Handwork

John A. Handwork 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).

  • Bitmapped based trapping methods, apparatus and system by modifying non-black halftone pixel bitmap plane using estimated continuous tone value
    Patent number: 8437045
    Abstract: Provided are bitmap based trapping methods, apparatus and systems. According to one exemplary method, black trapping color image data is performed by estimating the continuous tone values associated with non-black pixels near a qualified black pixel and subsequently, the estimated continuous tone values are halftoned at the qualified black pixel locations and ORed with the original bitmap data.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: May 7, 2013
    Assignee: Xerox Corporation
    Inventors: Meng Yao, John A. Handwork, Xing Li
  • BITMAPPED BASED TRAPPING METHODS, APPARATUS AND SYSTEMS
    Publication number: 20110051197
    Abstract: Provided are bitmap based trapping methods, apparatus and systems. According to one exemplary method, black trapping color image data is performed by estimating the continuous tone values associated with non-black pixels near a qualified black pixel and subsequently, the estimated continuous tone values are halftoned at the qualified black pixel locations and ORed with the original bitmap data.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Meng Yao, John A. Handwork, Xing Li