Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1995-12-29
1998-06-23
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358462, 358453, 358529, 382266, 382267, 382268, 382269, 382199, H04N 138, H04N 140, H04N 1387, G03F 308
Patent
active
057711070
ABSTRACT:
An image processor is provided which emphasis-processes an image to be copied with attention to the detection of black edges so that clear color copy outputs are obtained. R, G and B data read out from an original by a scanner are converted into C, M and Y complementary color data by a complementary color reversing circuit. The complementary color data are transmitted to a black edge processing circuit and to a black edge detecting circuit. The black edge detecting circuit detects the inside or the outside of a black edge, and in accordance therewith, the black edge processing circuit, for example, changes the coefficient of a spatial filter. The output of the black edge processing circuit is outputted to a printer through a black generating circuit, a tone correcting circuit and a half tone processing circuit.
REFERENCES:
patent: 4893188 (1990-01-01), Murakami et al.
patent: 5050231 (1991-09-01), Watanabe et al.
patent: 5459587 (1995-10-01), Fukushima
patent: 5477346 (1995-12-01), Murata
patent: 5488673 (1996-01-01), Katayama et al.
Fujimoto Masaya
Hayashi Shinji
Miyazaki Tadashi
Coles Sr. Edward L.
Harris Tia M.
Mita Industrial Co. Ltd.
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