Image processing apparatus with interference suppression

Details Image processing apparatus with interference suppression Image processing apparatus with interference suppression

1987-08-25

1991-03-12

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358456, 358465, H04N 140

Patent

active

049997181

ABSTRACT:
An image processing apparatus comprises a pulse-width-modulation signal generator for processing an image signal generated by an image signal generator by using a pattern signal to produce a pulse-width modulation signal. The pulse-width modulation signal generator generates first and second pattern signals of different periods, selects one of the pattern signals in accordance with a property of an image to be processed, and inhibits the generation of the non-selected pattern signal.

REFERENCES:
patent: 4553173 (1985-11-01), Kawamura
patent: 4782398 (1988-11-01), Mita
patent: 4800442 (1989-01-01), Riseman et al.
patent: 4831392 (1989-05-01), Dei
patent: 4847654 (1989-07-01), Honma et al.
patent: 4847695 (1989-07-01), Arai

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