Patents by Inventor Li-Kai Cho

Li-Kai Cho 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).

  • Image processing method and image processing apparatus
    Patent number: 8233713
    Abstract: An image processing method, for receiving an input image and separating pixels having text characteristics and pixels having figure characteristics, includes: applying a first filtering processing for the input image to derive a first image processing result; applying a second filtering processing for the first image processing result to derive a second image processing result, wherein a distribution of filtering parameters of the first filtering processing is different from a distribution of filtering parameters of the second filtering processing; deriving a set of first reference values according to the first image processing result and the second image processing result; and determining whether each pixel within the input image is a text pixel or a figure pixel according to at least the set of the first reference values and a predetermined threshold.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: July 31, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Hui-Jan Chien, Tsai-Hsing Chen, Li-Kai Cho, Chiung-Sheng Wang, Sung-Hui Lin
  • IMAGE PROCESSING METHOD AND IMAGE PROCESSING APPARATUS
    Publication number: 20110116141
    Abstract: An image processing method, for receiving an input image and separating pixels having text characteristics and pixels having figure characteristics, includes: applying a first filtering processing for the input image to derive a first image processing result; applying a second filtering processing for the first image processing result to derive a second image processing result, wherein a distribution of filtering parameters of the first filtering processing is different from a distribution of filtering parameters of the second filtering processing; deriving a set of first reference values according to the first image processing result and the second image processing result; and determining whether each pixel within the input image is a text pixel or a figure pixel according to at least the set of the first reference values and a predetermined threshold.
    Type: Application
    Filed: January 14, 2010
    Publication date: May 19, 2011
    Inventors: Hui-Jan Chien, Tsai-Hsing Chen, Li-Kai Cho, Chiung-Sheng Wang, Sung-Hui Lin