Patents by Inventor Ka Cheong Yu

Ka Cheong Yu 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).

  • Patent number: 6829064
    Abstract: A technique is provided for reducing inking of image and text areas in an ink jet printing system. Initially, a shaded image/text multi-bit mask is provided. Half-toning, such as error diffusion, is applied to dither the shaded multi-bit mask to a one-bit mask. An image/text bitmap is loaded before applying a logical AND to the one-bit mask and the bitmap to generate a reduced ink image or text character. A character outline is created from the character bitmap. Finally, a logical OR is applied to the reduced ink character and the character outline to generate a reduced ink character with defined edges. This technique maintains fine detail in the image area as well as fine detail in small text characters.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: December 7, 2004
    Assignee: Eastman Kodak Company
    Inventors: Ka Cheong Yu, William R. Bitticker, Roger D. Parrett, Verlin D. Eblin