Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1993-04-28
1995-02-21
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358448, 382 54, H04N 140
Patent
active
053921372
ABSTRACT:
An image processing apparatus includes a reading part for optically reading an input image signal from an original document, a first filtering part for outputting a first image signal by processing the input image signal through an edge sharpening filter, a second filtering part for outputting a second image signal by processing the input image signal through a smoothing filter, a detecting part for detecting an edge quantity of the input image signal, a correcting part for outputting a first edge quantity by correcting the edge quantity, a mixing part for mixing two image signals from among the input image signal, the first image signal, and the second image signal in accordance with a mixing factor so that an image signal obtained by the mixing is output to a recording unit, and a mixing control part for determining the mixing factor in response to the first edge quantity output from the correcting part, and for supplying the mixing factor to the mixing part.
REFERENCES:
patent: 4855933 (1989-08-01), Kondo
patent: 5134667 (1992-07-01), Suzuki
patent: 5166810 (1992-11-01), Sorimachi et al.
patent: 5231677 (1993-07-01), Mita et al.
Coles Sr. Edward L.
Lee Thomas D.
Ricoh & Company, Ltd.
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