| 摘要 |
PROBLEM TO BE SOLVED: To easily adjust the contrast of the saturation of a color input image signal with high accuracy without being affected by hue. SOLUTION: After an HLS conversion circuit 48 converts network % signals C, M, Y, into hue H, lightness L and saturation S, the saturation S is adjusted by a desired adjustment quantity on the basis of a desired center saturation to calculate a saturation S' and a correction quantity calculation circuit 52 uses the saturation S' and the hue H and the lightness L to obtain correction quantitiesΔC,ΔM,ΔY,ΔK and adds the correction quantitiesΔC,ΔM,ΔY,ΔK to the network % signals C, M, Y, K.
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