| 摘要 |
<p>Apparatus and a technique for generating a screened reproduction of an image is disclosed. The technique includes several steps. The first step involves providing a representation of an original having input density values of the original. The second step involves storing information representing a plurality of desired dot configurations, corresponding to various possible density values. In the third step, for each coordinate pair in a given region, containing a multiplicity of coordinate pairs, a determination of whether the given region includes a part of a dot corresponding to the input density of the original is performed. In the fourth step, for regions which are determined to include a part of a dot, a determination is made whether a coordinate pair lies within the boundary coordinates of the dot. The fifth step involves operating the plotter to write only if the coordinate pair lies inside the boundary coordinates of the dot, thereby to produce the multiplicity of screen dots of configurations representing the input density values of the original. <IMAGE></p> |
