Patents by Inventor Du Yong

Du Yong 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).

  • Publication number: 20060227382
    Abstract: A method for descreening a scanned image includes providing an image in a color space. A target pixel is identified from a plurality of original pixels in the color space. An average value and a standard deviation value is computed for the target pixel with respect to other pixels in a sample window for each channel of the color space. For each channel in the color space an associated lookup table storing a plurality of kernel size values is selected. The average value and the standard deviation value computed for each channel is used to index the associated lookup table to select a kernel size value of the plurality of kernel size values for each channel. The kernel size value for each channel is applied to a low-pass filter to generate filtered pixel values in the color space corresponding to the target pixel, and the target pixel values of the target pixel are replaced with the filtered pixel values.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 12, 2006
    Inventors: Du-yong Ng, Khageshwar Thakur