Patents by Inventor Akira Hikita

Akira Hikita 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).

  • Method of generating raster data useful in reproducing a multitone image
    Patent number: 4951228
    Abstract: A priority grade is provided to each of several graphic figures. Respective contour lines of the graphic figures are classified into two groups according to respective locations. Respective contour lines in the two groups are serially selected in a descending order of main scanning coordinate values, and are compared with each other to specify a cross point having the largest coordinate value within a selected pair of cross points. A component of the raster data is generated on the basis of the selected cross point when a priority grade of the selected cross point satisfies a predetermined condition in connection with respective priority grades of the other cross points.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: August 21, 1990
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventors: Takahide Hirawa, Hitoshi Matsuda, Akira Hikita, Yoshikazu Kago