Method for image reduction processing according to criterion poi

Details Method for image reduction processing according to criterion poi Method for image reduction processing according to criterion poi

1989-01-23

1990-06-19

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358457, H04N 140

Patent

active

049358227

ABSTRACT:
Image reduction processing of a given original image is effected by determining the brightness of each picture element in a resultant reduced image in accordance with the numbers of black and white pixels in an intermediate matrix image obtained by quantizing the original image. When the black and white pixels in the quantized intermediate matrix image are equal, the aforesaid brightness is determined according to a prescribed criterion matrix pattern having a criterion point, thereby to obtain the reduced image on a display or the like with high fidelity to the original image.

REFERENCES:
patent: 4639790 (1987-01-01), Kusaka
patent: 4740844 (1988-04-01), Yoshimura
patent: 4758897 (1988-08-01), Hiratsuka et al.
patent: 4803558 (1989-02-01), Hiratsuka et al.
patent: 4827353 (1989-05-01), Ehlers et al.

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