HALFTONE SUPER-CELL OPTIMIZING METHOD, IMAGE OUTPUT APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR HALFTONE SUPER-CELL OPTIMIZATION

摘要

PPROBLEM TO BE SOLVED: To provide a halftone super-cell optimizing method for artifact reduction. PSOLUTION: Artifact reduction is achieved by altering the growth of sub-cells for each super-cell in either a pre-determined or random manner. The means of alteration is selected such that the sum of all the groups equals a halftone value. In another embodiment, the random group is selected by using predetermined patterns which are different among sub-cells, such as different means of constructing a dot. Preferably a different pattern is used in adjacent super-cells. In yet another embodiment, the method selects sub-cells patterns that are not aligned on the super-cell boundaries. PCOPYRIGHT: (C)2005,JPO&NCIPI