Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1993-06-07
1995-03-07
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358450, 358463, 358515, 358523, 358530, H04N 1387, H04N 138, H04N 146, G03F 308
Patent
active
053963466
ABSTRACT:
An image processing apparatus and method capable of suppressing noise and improving the S/N ratio of a processing output signal when a color signal representing color image data is processed. The RGB.fwdarw.YUV converter is comprised of conversion units 201-1 . . . 201-k, adder 205, and rounding processing circuit 206 which are built in the image processing apparatus such as a color printer, each of the conversion units 10 201-1 . . . 201-k is provided with an adder 11 between the multiplier 10 and rounding processing unit 12 and corrects errors generated by the rounding processing circuit 206.
REFERENCES:
patent: 5309258 (1994-05-01), Kouno et al.
Fukuda Hiromi
Nakayama Tadayoshi
Canon Kabushiki Kaisha
Coles Sr. Edward L.
Williams Kimberly A.
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