Color image pickup device in which the level of a sequential col

Details Color image pickup device in which the level of a sequential col Color image pickup device in which the level of a sequential col

1987-02-11

1988-06-28

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 27, 358 29, 358 41, 358316, H04N 9077, H04N 904, H04N 968, H04N 973

Patent

active

047543230

ABSTRACT:
A color image pickup device suppresses false color signals in order to provide true color reproduction. That is, the device incrementally or continuously reduces false color signals. More particularly, this device includes a color separation filter through which an optical image passes to an image pickup device such as a CCD sensor or the like. A suppression circuit that includes a low pass filter and a high brightness detector detects when the brightness of the optical image exceeds a predetermined level. A color signal forming circuit forms a plurality of color signals from the output of the image pickup device and this plurality of color signals are output by a sequencing circuit in a predetermined cycle. The output level of the sequencing circuit is adjusted in response to the output of the detector by a control circuit, and this output is modulated by a modulator. Thus, in accordance with the present invention, the output level of the sequencing circuit is controlled in accordance with the brightness level of the optical image before modulation of the output color signal from the sequencing circuit.

REFERENCES:
patent: 3699241 (1972-10-01), Larsen
patent: 3717725 (1973-02-01), Numakura
patent: 3821789 (1974-06-01), Durbin, Jr. et al.
patent: 3988776 (1976-10-01), Shinozaki et al.
patent: 4338625 (1982-07-01), Yamanaka
patent: 4359756 (1982-11-01), Schneider et al.
patent: 4437112 (1984-03-01), Tanaka et al.
patent: 4504854 (1985-03-01), Masuda

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