Method of and apparatus for recording halftone images

Details Method of and apparatus for recording halftone images Method of and apparatus for recording halftone images

1993-07-16

1995-10-03

Reinhart, Mark J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358458, 347251, H04N 121

Patent

active

054556821

ABSTRACT:
The present invention produces a set of improved halftone images which effectively prevents occurrence of rosette moire. A plurality of parallelograms can be formed from three apexes consisting of an arbitrary first apex of a reference triangle RT1, a middle point of the side of the triangle facing to the first apex, and one of the other two apexes of the triangle. One of the parallelograms is selected as a unit area for one halftone dot. The unit area is virtually laid out repeatedly on an image plane, and one halftone dot is located with respect to each unit area. Each halftone dot can be located at the center of the unit area or at any desirable position in the unit area.

REFERENCES:
patent: 4673971 (1987-06-01), Ikuta et al.
patent: 4977464 (1990-12-01), Ikuta
patent: 5055923 (1991-10-01), Kitagawa et al.
patent: 5299020 (1994-03-01), Carlebach

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