Patents by Inventor Wen-Chian Wong

Wen-Chian Wong 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).

  • Tone dependent green-noise error diffusion method and printing device thereof
    Patent number: 8169665
    Abstract: A tone dependent green-noise error diffusion method includes setting a first threshold and a second threshold, and determining a two-level value of a color level of an input image according to the first threshold and the second threshold; subtracting the two-level value from the color level value to generate an error value; performing an error diffusion on the error value to generate an error diffusion accumulation value; adjusting the color level according to the error diffusion accumulation value; performing a hysteresis filtering on the two-level value to generate an output dependent feedback value; and adjusting the color level according to the output dependent feedback value.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: May 1, 2012
    Assignees: Silitek Electronic (Guangzhou) Co., Ltd., Lite-On Technology Corp.
    Inventors: Wen-Chian Wong, Chen-Chung Chen
  • TONE DEPENDENT GREEN-NOISE ERROR DIFFUSION METHOD AND PRINTING DEVICE THEREOF
    Publication number: 20100245927
    Abstract: A tone dependent green-noise error diffusion method includes setting a first threshold and a second threshold, and determining a two-level value of a color level of an input image according to the first threshold and the second threshold; subtracting the two-level value from the color level value to generate an error value; performing an error diffusion on the error value to generate an error diffusion accumulation value; adjusting the color level according to the error diffusion accumulation value; performing a hysteresis filtering on the two-level value to generate an output dependent feedback value; and adjusting the color level according to the output dependent feedback value.
    Type: Application
    Filed: March 30, 2009
    Publication date: September 30, 2010
    Inventors: Wen-Chian Wong, Chen-Chung Chen