| 摘要 |
An apparatus is disclosed for generating a screened reproduction of an image having a scanner and a CPU receiving input density values of an original and coordinate information and storing screening information for providing an operating input to a plotter enabling the plotter to provide a screened image of the original. The CPU is operative to modify at least one of the input density values, the coordinate information and the screening information, thereby to provide an operating input generally free of repeated artifacts arising from the lack of coordination between the coordinate systems of the plotter and those of the screening information. This is achieved, in particular, by maintaining a uniform number of plotter lines in each dot of the screened image for a given input density.
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