Image processing apparatus

Details Image processing apparatus Image processing apparatus

1985-12-23

1989-04-11

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358283, 358293, G06K 938

Patent

active

048213349

ABSTRACT:
An image processing apparatus has an image reading unit, a two dimensional smoothing circuit, a dither processing circuit, a binarizing circuit, a discriminator, a switch and a printer. A moire suppressed binary signal from the dither processing circuit is supplied to the printer via the switch when the discriminator discriminates a pixel of interest as a dot region. However, when the discriminator discriminates the pixel of interest as a line image region, a binary signal from the binarizing circuit is supplied to the printer via the switch.

REFERENCES:
patent: 4194221 (1980-03-01), Stoffel
patent: 4288821 (1981-09-01), Lavallee et al.
patent: 4414581 (1983-11-01), Kato et al.
patent: 4447830 (1984-05-01), Stoffel
patent: 4525859 (1985-06-01), Bowles et al.
Linear Approximation of Quantized Thin Lines, S. H. Y. Hung, et al., 1983.
Offenlegungsschrift DE 3419693A1, Yokomizo, 11/29/84.

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