Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-03-17
1989-09-12
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
382 42, 364518, H04N 140
Patent
active
048665347
ABSTRACT:
An image processing apparatus for transforming electic data of a half-tone image into a bi-level image by using a dither matrix, having a plurality of dither matrices of different patterns to each other, the dither matrices being chosen to remove textures due to dither processing, wherein the average of electric image data of a block of the size of the dither matrices is calculated, and a dither matrix is selected according to the average.
REFERENCES:
patent: 4651243 (1987-03-01), Kato
Fumitaka One, "Dither Method", J. Institute of Image Electronics Engineers of Japan 40, 388-397, 1980 (partial trans.)
Coles Sr. Edward L.
Minolta Camera Kabushiki Kaisha
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