Digital image forming apparatus using subdivided pixels

Details Digital image forming apparatus using subdivided pixels Digital image forming apparatus using subdivided pixels

1992-08-10

1996-01-23

Wong, Peter S.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358300, 358456, 347131, H04N 1387, H04N 129, H04N 140, G01D 1514

Patent

active

054869277

ABSTRACT:
In a method of forming an image in a form of pixels, the density distribution around a target pixel is obtained by processing image signals of pixels neighboring the target pixel. The target pixel is sub-divided into a plurality of sub-pixels which form of matrix of n rows.times.m columns. The sub density distribution of the sub-pixels in the target pixel is assumed from the density distribution of the neighboring pixels. The density of each of sub-pixels is determined by multiplying the density of the target pixel, by a constant P and a density ratio of the corresponding sub-pixels in the sub density distribution.

REFERENCES:
patent: 4124870 (1978-11-01), Schatz et al.
patent: 4150400 (1979-04-01), Wong
patent: 4258393 (1981-03-01), Ejir et al.
patent: 4782398 (1988-11-01), Mita
patent: 4868684 (1989-09-01), Suzuki
patent: 5050000 (1991-09-01), Ng
patent: 5172132 (1992-12-01), Haneda et al.

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