Method and apparatus for forming halftone dots

Details Method and apparatus for forming halftone dots Method and apparatus for forming halftone dots

1997-05-27

2000-06-06

Rogers, Scott

Facsimile and static presentation processing

Static presentation processing

Attribute control

358456, 358459, G06K 1502, H04N 1405

Patent

active

060725907

ABSTRACT:
A halftone dot forming method of the invention uses a replicated unit area of prescribed configuration including N pieces of halftone dot areas, where N is an integer of at least 2. An image signal is compared with threshold values assigned to pixels in the replicated unit area to form the halftone dots. The threshold value distribution in the replicated unit area is determined so as to form halftone dots whose areas are substantially equal at an arbitrary halftone dot area rate and which interconnect substantially simultaneously when the halftone dot area rate is 50%.

REFERENCES:
patent: 4419690 (1983-12-01), Hammes
patent: 5285291 (1994-02-01), Schiller

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