Printing method, print unit, program for the same, and...

Details Printing method, print unit, program for the same, and... Printing method, print unit, program for the same, and...

2006-01-31

2006-01-31

Stephens, Juanita D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

06991316

ABSTRACT:
The invention prevents a pattern arising from periodicity of dot arrangements from appearing as noise, such as a streak, when a plurality of different dot arrangements are used repeatedly in a unit of a predetermined number of the dot arrangements for the same level of gradation of input image data, and thereby makes it possible to print a high-quality image. To this end, when input image data quantized to one of multivalued levels of gradation is allocated to a dot arrangement of M×N, a matrix of A×B created by combining a plurality of different dot arrangements each displaying the same level of gradation of the input image data in a raster direction and in a column direction is used as a minimum unit, and the dot arrangement of this matrix is allocated to the input image data.

REFERENCES:
patent: 4920355 (1990-04-01), Katerberg
patent: 6203133 (2001-03-01), Tanaka et al.
patent: 6334659 (2002-01-01), Maeda et al.
patent: 6491373 (2002-12-01), Fujita et al.
patent: 2002/0080394 (2002-06-01), Ogasahara et al.
patent: 7-242025 (1995-09-01), None
patent: 9-46522 (1997-02-01), None

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