Patents by Inventor Woo-ri Choi

Woo-ri Choi 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 forming apparatus that emphasizes a boundary between two objects using a halftoning process
    Patent number: 8498019
    Abstract: An image forming apparatus capable of reducing a stitch effect, an image forming system including the same, and a printing method thereof. The printing method of the image forming system includes inputting image data to be printed; and, if adjacent first and second objects included in the input image data have different LPIs (Lines Per Inch), emphasizing at least one of boundaries of the first and second objects and printing the image data with an emphasized boundary.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: July 30, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Woo-ri Choi
  • Image forming apparatus and color converting method thereof
    Patent number: 8363267
    Abstract: An image forming apparatus including a scanning unit to scan an image and to output corresponding digital color coordinates; a determining unit to determine a local color gamut including the digital color coordinates, based on a reference matrix computed from a standard color gamut, which includes the local color gamut, and the plurality of digital color coordinates; a matrix selecting unit to select a color conversion matrix that corresponds to the determined local color gamut; and a computing unit to compute LAB color coordinates based on the selected color conversion matrix and the digital color coordinates. A method of color conversion using the image forming apparatus is also provided.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: January 29, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-kyung Hong, Jae-min Shin, In-ho Park, Woo-ri Choi
  • IMAGE FORMING APPARATUS, IMAGE FORMING SYSTEM INCLUDING THE SAME, AND PRINTING METHOD THEREOF
    Publication number: 20100073699
    Abstract: An image forming apparatus capable of reducing a stitch effect, an image forming system including the same, and a printing method thereof. The printing method of the image forming system includes inputting image data to be printed; and, if adjacent first and second objects included in the input image data have different LPIs (Lines Per Inch), emphasizing at least one of boundaries of the first and second objects and printing the image data with an emphasized boundary.
    Type: Application
    Filed: September 24, 2009
    Publication date: March 25, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Woo-ri CHOI
  • IMAGE FORMING APPARATUS AND COLOR CONVERTING METHOD THEREOF
    Publication number: 20080297817
    Abstract: An image forming apparatus including a scanning unit to scan an image and to output corresponding digital color coordinates; a determining unit to determine a local color gamut including the digital color coordinates, based on a reference matrix computed from a standard color gamut, which includes the local color gamut, and the plurality of digital color coordinates; a matrix selecting unit to select a color conversion matrix that corresponds to the determined local color gamut; and a computing unit to compute LAB color coordinates based on the selected color conversion matrix and the digital color coordinates. A method of color conversion using the image forming apparatus is also provided.
    Type: Application
    Filed: January 11, 2008
    Publication date: December 4, 2008
    Applicant: Samsung Electronics C., Ltd.
    Inventors: Jin-kyung Hong, Jae-min Shin, In-ho Park, Woo-ri Choi