Image copying apparatus having means for deleting color portions

Details Image copying apparatus having means for deleting color portions Image copying apparatus having means for deleting color portions

1991-04-29

1993-01-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358453, 358 75, H04N 146

Patent

active

051776030

ABSTRACT:
A color deleting apparatus includes an image reading device for reading a color original document and for producing R, G, B signals for each pixel, a monochrome generator for producing a gradiation image signal based on the R, G, B signal, a color judging circuit for judging whether the R, G, B signal is carrying chromatic information or achromatic information, and a deleting circuit for deleting the gradiation image signal when the color judging circuit judges that the R, G, B signal is carrying chromatic information. Thus, the colored areas in the color original document are completely deleted in the copied image.

REFERENCES:
patent: 4538182 (1985-08-01), Saito et al.
patent: 4739397 (1988-04-01), Hayashi
patent: 4829371 (1989-05-01), Hiramatsu et al.
patent: 4893179 (1990-01-01), Ito
patent: 5028991 (1991-07-01), Sekizawa et al.
patent: 5032904 (1991-07-01), Murai et al.

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