Color CCD imager having a system for preventing reproducibility

Details Color CCD imager having a system for preventing reproducibility Color CCD imager having a system for preventing reproducibility

1991-09-16

1993-10-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 29, 358 39, H04N 907

Patent

active

052530477

ABSTRACT:
A color video camera according to the present invention includes a color temperature detector for detecting a color temperature of a video source and a primary color separator, wherein matrix coefficients of the primary color separator are controlled in accordance with an output of the color temperature detector in such a manner that, for example, when the color temperature of a video source is low, that is, the color of a video source is reddish, red and blue components of the video source are corrected to be weakened and intensified respectively. On the contrary, when the color temperature of a video source is high, that is, the color of a video source is bluish, the red and blue components of the video source are corrected to be intensified and weakened respectively, whereby the degradation of the color reproducibility of the chromatic colors due to the change in the color temperature can be prevented.

REFERENCES:
patent: 4700219 (1987-10-01), Tanaka et al.
patent: 4827331 (1989-05-01), Nakamura et al.
patent: 4833527 (1989-05-01), Kondo
patent: 4974066 (1990-11-01), Tusji
patent: 5068718 (1991-11-01), Iwabe et al.
IEEE 1990 International Conference on Consumer Electronics, Digest of Technical Papers, Jun. 6-8, 1990; Takuya Imaide et al, "A Compact CCD Color Camera System with Digital AWB Control".
8087 IEEE Transactions on Consumer Electronics, 36 Nov., 1990, No. 4, Takuya Imaide et al, "A Compact CCD Color Camera System with Digital AWB Control".

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