Enhanced sensitivity color video camera with reduced red compone

Details Enhanced sensitivity color video camera with reduced red compone Enhanced sensitivity color video camera with reduced red compone

1985-07-16

1987-08-18

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 43, 358 30, 358211, H04N 907, H04N 967, H04N 530

Patent

active

046880852

ABSTRACT:
A color video camera uses an infrared cut-off filter, a complementary filter and a solid state image pick-up device. The infrared cut-off filter cuts off near infrared light of image above a wavelength .lambda.c, which is set in the range of 670 nm.ltoreq..lambda.c.ltoreq.780 nm. A color sampling/generating circuit has a matrix circuit connected to the solid state image pick-up device for providing a first luminance signal, a second luminance signal, a red channel signal and a blue channel signal. The second luminance signal is used for producing a red color difference signal and a blue color difference signal by using the red channel signal and the blue channel signal in a processing circuit. In the matrix circuit, matrix coefficients for producing the second luminance signal are set to reduce the red component of the second luminance signal. Further, the red color difference signal below a predetermined value is extracted and added to the first luminance signal to reduce the red component of the first luminance signal.

REFERENCES:
patent: 4016597 (1977-04-01), Dillon et al.
patent: 4160264 (1979-07-01), Hailey et al.
patent: 4246601 (1981-01-01), Sato et al.
patent: 4437111 (1984-03-01), Inai et al.
Takemura, "CCD 2-Plate Style Color Television Camera", published by The TV Scientific Society of Japan, vol. 33, Section 7, 1979.

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