Image processing apparatus for converting a color image into a p

Details Image processing apparatus for converting a color image into a p Image processing apparatus for converting a color image into a p

1995-05-02

1997-11-25

Rogers, Scott A.

Facsimile and static presentation processing

Natural color facsimile

Specific image-processing circuitry

358462, 382165, 382176, 382258, 382286, H04N 156

Patent

active

056918275

ABSTRACT:
An image processing apparatus for converting color images into monochromatic pattern images. The image processing apparatus includes: means for detecting the area of a color image; means for converting a color image into a monochromatic pattern image; and control means for varying such image processing in accordance with the result of detection made by the means for detecting the area. When a thin line is detected in a color area, the method of processing is determined based on the width of the detected thin line. For example, when the width of the thin line is smaller than a predetermined value, the area of such thin line may be outputted as a plain image instead of a pattern image so that it may easily be seen or recognized. The contour of a color area may be made conspicuous by combining a plain image and a pattern image.

REFERENCES:
patent: 3668638 (1972-06-01), Iijima et al.
patent: 4308553 (1981-12-01), Roetling
patent: 4369461 (1983-01-01), Tamura
patent: 4688031 (1987-08-01), Haggerty
patent: 5021876 (1991-06-01), Kurita et al.
patent: 5032928 (1991-07-01), Sakai et al.
patent: 5054099 (1991-10-01), Wakabayashi et al.
patent: 5079625 (1992-01-01), Kitamura et al.
IBM Technical Disclosure Bulletin, 31(3), pp. 224-227 (Aug. 1988).

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