Patents Assigned to D. S. Scanner Co., Ltd.
  • Method of and apparatus for producing halftone dot film of gradated density distribution
    Patent number: 4635131
    Abstract: In an electronic image reproduction system, a halftone dot film of a density distribution of a specific pattern is produced by obtaining a value l expressed by an equation l=f(x)+g(y) representative of the specific pattern corresponding to the density value. By superimposing a density signal corresponding to the value l on an image signal developed by scanning an original, a reproduction image of the original, modulated by the density signal of a specific pattern, is obtained.
    Type: Grant
    Filed: October 9, 1985
    Date of Patent: January 6, 1987
    Assignees: D. S. Scanner Co., Ltd., Dainippon Screen Mfg. Co., Ltd.
    Inventors: Shinichi Terada, Kozo Masuda, Yoshimitsu Adachi