Patents by Inventor Wenhua Jia

Wenhua Jia 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).

  • Automatic trapping method and system
    Patent number: 8675257
    Abstract: An automatic trapping method and system is used for packaging printing. The method includes translating trapping objects into simple color blocks, scanning all of the blocks and attaining trapping boundaries, determining whether the color blocks on both sides of the trapping boundaries meet the trapping rule depending on the ink dots percentage and luminance, connecting trapping boundaries by analyzing regions, creating trapping zone and filling ink into the zone and reducing color.
    Type: Grant
    Filed: December 25, 2008
    Date of Patent: March 18, 2014
    Assignees: Founder International Co. Ltd., Peking University
    Inventors: Wenhua Jia, Min Liu, Pingli Li, Jianjun Jiang
  • AUTOMATIC TRAPPING METHOD AND SYSTEM
    Publication number: 20110090522
    Abstract: An automatic trapping method and system is used for packaging printing. The method includes translating trapping objects into simple color blocks, scanning all of the blocks and attaining trapping boundaries, determining whether the color blocks on both sides of the trapping boundaries meet the trapping rule depending on the ink dots percentage and luminance, connecting trapping boundaries by analyzing regions, creating trapping zone and filling ink into the zone and reducing color.
    Type: Application
    Filed: December 25, 2008
    Publication date: April 21, 2011
    Applicants: Peking University
    Inventors: Wenhua Jia, Min Liu, Pingli Li, Jianjun Jiang