Image processing device having function of detecting dotted-imag

Details Image processing device having function of detecting dotted-imag Image processing device having function of detecting dotted-imag

1995-03-27

1995-12-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358462, 358455, H04N 140

Patent

active

054734444

ABSTRACT:
An image processing device includes a first unit for detecting a pixel at which a predetermined local variation of image data occurs, a second unit for detecting a density relating to the above pixel within a predetermined scanning area, and a third unit for determining whether or not the image data forms a dotted-image area on the basis of the density detected by the second unit.

REFERENCES:
patent: 4503556 (1985-03-01), Scherl et al.
patent: 4547811 (1985-10-01), Ochi et al.
patent: 5202771 (1993-04-01), Murayama
patent: 5278919 (1994-01-01), Sugiura et al.

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