Color detecting circuit

Details Color detecting circuit Color detecting circuit

1990-08-08

1992-07-28

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 28, 358 29, H04N 964

Patent

active

051344653

ABSTRACT:
In the invention, in order to correct only the hue of specific region of color correction of an image processing circuit for a television receiver or the like, using color detecting means for detecting specific color, color signals are inputted and two arbitrary demodulation axes are obtained, and only negative component or positive component is extracted respectively from the output signals of the two means and the logic product of the extracted output signals is obtained. On the other hand, the output of the color detecting means is controlled in response to the signal level of the prescribed color signal, and then adding is performed to the prescribed color signal and the color correction is performed.

REFERENCES:
patent: 3678182 (1972-07-01), Boxman et al.
patent: 3749825 (1973-07-01), Moore

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