METHODS OF CONTROLLING DOT SIZE IN DIGITAL HALFTONING WITH MULTI-CELL THRESHOLD ARRAYS

摘要

A method of equalizing the shape and size of halftone dots in a supertile having digital cells, corresponding ideal cells and pixels to faithfully reproduce an image having predetermined gray levels. Various techniques include: (1) adding offset vectors to the coordinates of pixels in digital cells; (2) determining twice as many smaller digital cells as original digital cells; and (3) determining a model digital cell and ranking pixels in remaining digital cells to mimic the ranking of pixels in the model cell. RSS//8514-27//PC15.PAT 49