Image signal processor, color video camera, and processing method of video signal

摘要

The three primary color signals R, G, B 'obtained as output signals of multipliers 150r, 156g, 156B multiplying the three primary color signals R, G and B supplied to the input terminals 151r, 151g, 151b to maintain the saturation and hue by the coefficient K and maintaining the saturation and hue, and the first color compression circuit 160r, 160g, 160b, said three primary colors In the state where the hue and the luminance of the color video signal represented by R, G, and B are maintained, the saturation of the color video signal is compressed so that the signal level having the highest signal level of the three primary color signals R, G, B 'becomes the clip level. Then, for the three primary color signals R ", G", B "obtained as output signals of the first saturation compressing circuits 160r, 160g, and 160b, only the saturation degree is compressed by the second saturation compression circuits 163r, 163g, and 163b while maintaining luminance and hue, and only the saturation of the high luminance portion is changed The three primary color signals R *, g * and B * are obtained.