Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1987-11-16
1989-05-23
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 80, G03F 308, H04N 146
Patent
active
048335290
ABSTRACT:
A color separated image processing means includes a plurality of line sensors each receiving a different color-separated light image. The respective light images are converted into corresponding image signals which are respectively normalized with respect to respective reference signals. And, the normalized image signals are compared one from another by a color identifying circuit which supplies as its output a status signal indicating the presence or absence of an intended color for a pixel under examination. The status signal and the normalized image signals are supplied to a color separating circuit which supplies as its output either a first color image signal, which is obtained by carrying out a predetermined calculation using the normalized image signals, or a second color image signal, which corresponds to a predetermined one of the normalized image signals, depending on the state of the status signal. In one embodiment a maximum value detecting circuit is used in the calculation of a corrected first color image signal while in another embodiment a predetermined multiple of one of the reference signals is used to calculate a corrected first color image signal. In one embodiment, the image signals are red and cyan signals, and the first and second color image signals are a red signal and a black and white signal.
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Nakano et al., "Study on Reading and Recording of a Two-Color Image", Okai Denki Research and Development Report, Dec. 1980, 111, vol. 47, No. 2, pp. 43-46 (in Japanese).
Groody James J.
Ricoh & Company, Ltd.
Svihla Randall S.
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