Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1989-11-06
1991-09-03
Wieder, Kenneth A.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 80, 358454, 358456, H04N 123
Patent
active
050459317
ABSTRACT:
A printed image without rosette moire can be produced by adjusting positional relations among halftone images. Halftone dots (M.sub.1, C.sub.1) of magenta and cyan printers are placed at a reference position (P.sub.1). A halftone dot (K.sub.1) of black printer is placed at a position (PK.sub.1) which is half a screen pitch (d.sub.1) distant from the reference position (P.sub.1) in one of a first direction representing the screen angle (45.degree.) of the halftone image for the black printer and a second direction inclined at 90.degree. away from said first direction. Screen angles of respective halftone images are set so that each of differences between screen angle (15.degree., 45.degree.) of the cyan and black printers and between screen angles (75.degree., 45.degree.) of the magenta and black printers is about 30.degree..
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Brown Glenn W.
Dainippon Screen Mfg. Co,. Ltd.
Wieder Kenneth A.
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