Color image signal processing circuit with white balance control

Details Color image signal processing circuit with white balance control Color image signal processing circuit with white balance control

1986-10-23

1989-08-22

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 41, 358 44, 358 50, H04N 973, H04N 904, H04N 907, H04N 909

Patent

active

048600920

ABSTRACT:
A color image pickup apparatus in which a luminance signal is formed by repeatedly switching, one by one, red, green and blue color signals separated by color separation circuits from a dot sequential output of a color CCD image pickup element and balanced by a white balance control circuit. The red, green and blue color signals are combined in a luminance signal processing circuit. The apparatus further comprises a first gain control circuit for increasing the gain of the luminance signal processing circuit in order to increase the sensitivity of the apparatus. Also a second gain control circuit is provided for decreasing the signal level of the blue color signal supplied to the luminance signal processing circuit when the gain of the luminance signal processing circuit is increased. Circuitry may be included for processing the color temperature and the brightness of the object so as to control the balance of the plural different color signals. Thus, it is possible to prevent the S/N of the luminance signal from lowering when the luminance signal processing circuit is operating in a condition of high gain.

REFERENCES:
patent: Re28774 (1976-04-01), Kubota et al.
patent: 4513313 (1985-04-01), Kinoshita et al.
patent: 4616253 (1986-10-01), Hashimoto et al.
patent: 4638352 (1987-01-01), Noda et al.
patent: 4750032 (1988-06-01), Nakayama
patent: 4751567 (1988-06-01), Hashimoto
Nabeyama, Hiroaki, et al., "All Solid State Color Camera with Single-Chip MOS Sensor", IEEE Transactions on Consumer Electronics, vol. CE-27, Feb. 1981, pp. 40-46.

Affiliated with

Also associated with

Rating

Color image signal processing circuit with white balance control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Color image signal processing circuit with white balance control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color image signal processing circuit with white balance control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2419947