S-Curve and Gamma correction in HSV/HSL color space. With S and Gamma curves you can make color adjustments not easily done in the usual HSV corrector. For example to shift Hue for some colors only while keeping others intact (use "H Base" slider to select which color to keep), or to make saturation more or less uniform ("S Curve S" slider) instead of only to increase/decrease it. Parameters: Color Space Select HSV or HSL color space. H Base The base Hue level at which the curve begins. This value affect Hue curves only. S Curve H Hue curve allows you to shift Hue for some colors keeping others intact (use "H Base" slider to select which color to keep). S Curve S Makes saturation more or less uniform instead of only to increase/decrease it. S Curve L/V Adds more contrast to midtones at the expense of shadows and highlights. The inverted S-Curve "stretches" the shadows and highlights whereas midtones get compressed. While in RGB S-Curve affects saturation, in HSV color space it affects only tones, not the colors. Gamma H Shifts Hue for some colors keeping others intact (use "H Base" slider to select which color to keep). Value of 0.0 = no change. Positive - midpoint up. Negative - midpoint down. Gamma S Changes the image saturation without clipping the value. Value of 0.0 = no change. Positive - midpoint up. Negative - midpoint down. Gamma L/V Gamma curve changes the image brightness (mostly for midtones) without clipping shadows and highlights. While in RGB Gamma affects saturation, in HSV color space it affects only tones, not the colors. Value of 0.0 = no change. Positive - midpoint up. Negative - midpoint down. Other linear corrections: S-Gamma - easy way to apply the common curves.