Method and apparatus for preparing color screens in a halftone image

摘要

The dot patterns can be used to reduce dot gain and moir+E,acu e+EE effects in halftone images involve printing areas that have inwardly curved edges and variable elongation. Colored images having screens that use these patterns can be printed with the screens at 45 DEG relative angular separations. Alternatively the dot patterns can be regarded as reversed variable oval patterns with varying elongation of the generally oval shaped non-printing areas.