FM photographic master generation method e.g. for newspaper

摘要

The method involves applying frequency modulated algorithms before colour separation. Preferably, the contrast of the colour separated material is amplified after the frequency modulation. The agglomeration of black raster cells are additionally deepen on the same coordinates using different standard printing ink. If necessary ink is not added at the edges of the agglomeration. Isolated groups of raster cells which are adjacent to black group cells are enlarged to prevent overprinting of the isolated raster cell groups.