Half tone image processing apparatus

Details Half tone image processing apparatus Half tone image processing apparatus

1994-06-21

1995-04-11

Chilcot, Jr., Richard E.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

356455, H04N 140

Patent

active

054063906

ABSTRACT:
An image processing apparatus for processing a half tone image comprises: an input device to input an image signal; an image forming circuit to form an image onto a recording medium such as a photosensitive drum on the basis of the image signal supplied by the input device; a generator to generate a plurality of image data having different densities; a density detector to detect a density of the image formed on the recording medium by the image forming circuit on the basis of the image data generated from the generator; and a forming circuit to form a plurality of density conversion coefficients to convert the density of the image signal supplied by the input device on the basis of the densities of the plurality of images which are detected by the density detector.

REFERENCES:
patent: 4751377 (1988-06-01), Ishizaka et al.
patent: 4864419 (1989-09-01), Saito et al.
patent: 4870506 (1989-09-01), Nakauchi
patent: 4882621 (1989-11-01), Suzuki et al.
patent: 4888636 (1989-12-01), Abe
patent: 4985779 (1991-01-01), Gall
patent: 5028991 (1991-07-01), Sekizawa et al.

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