Importance

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Abstract

A video parameter control system operative for correcting hue, saturation and luminance of a color video signal. Circuitry for generating and positioning a cursor on a video monitor displaying an uncorrected input video signal allows selection of a colored region on the monitor. Circuitry responsive to the cursor location selects one of a plurality of color correction circuits to become operative for directing video parameter correction such as hue, saturation and luminance only to regions in the video image corresponding to the hue selected by the cursor. In one embodiment, prestored digital correction values are retrieved from memory and converted into analog correction signals which modify the phase, amplitude and DC level of the composite video signal. In another embodiment, independent color derivative signals are employed in conjunction with the location of the cursor to route signals from operator controls to a channel carrying video signals of the selected hue.

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First Claim