Hue correction apparatus controlled by chrominance saturation

Details Hue correction apparatus controlled by chrominance saturation Hue correction apparatus controlled by chrominance saturation

1976-05-05

1977-09-27

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 9535

Patent

active

040515109

ABSTRACT:
Automatic hue correction apparatus of the general type described in U.S. Pat. No. 3,663,744 is modified to provide a reduction in flesh tone hue correction as a function of chrominance signal level. Chrominance signals are monitored on a dynamic basis and the phase of a color subcarrier reference signal is automatically altered when the chrominance signals are in the vicinity of the flesh tone (+I) axis. The phase of the reference subcarrier is altered by controllably adding a portion of an amplitude limited chrominance signal to the subcarrier so as to shift the subcarrier phase towards the phase of the chrominance signal. A normal phase correction range of the apparatus is controllably inhibited in the presence of relatively large amplitude chrominance signals representative of saturated colors.

REFERENCES:
patent: 3708614 (1973-01-01), Nakabe et al.
patent: 3871023 (1975-03-01), Caprio
"A Novel Automatic Hue Control System", IEEE Transactions on Consumer Electronics, vol. CE-21 No. 2 May 1975, pp. 155-163.

Affiliated with

Also associated with

Rating

Hue correction apparatus controlled by chrominance saturation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hue correction apparatus controlled by chrominance saturation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hue correction apparatus controlled by chrominance saturation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1819149