Image processing apparatus

Details Image processing apparatus Image processing apparatus

1988-02-18

1988-11-01

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, 358298, 375 22, H04N 140

Patent

active

047823984

ABSTRACT:
An image processing apparatus having versatility and expandability for obtaining a high-quality reproduced image is provided. The image processing apparatus of the invention has an LUT for generating an image signal, a first pattern signal generator for generating a first pattern signal, a comparator for processing the image signal using the first pattern signal and outputting a first pulse width modulation signal, a second pattern signal generator for generating a second pattern signal different from the first pattern signal, another comparator for processing the image signal using the second pattern signal and outputting a second pulse width modulation signal, and an OR gate for synthesizing the first and second pulse width modulation signals.

REFERENCES:
patent: 3197558 (1965-07-01), Ernst
patent: 3393269 (1968-07-01), Zeuthen
patent: 3882270 (1975-05-01), Ogawa
patent: 4346409 (1982-08-01), Ishida
patent: 4485408 (1984-11-01), Kamizyo
patent: 4535413 (1985-09-01), Shiota
patent: 4626923 (1986-12-01), Yoshida

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