User Manual

Selective desaturation in the shadows and highlights using the Lum vs. Sat curve;
Right–original image, Left–altered image
Sat vs. Sat
The Saturation vs. Saturation curve lets you selectively manipulate image saturation within
specific regions defined by the image’s original image saturation. Control points added to the
left of this curve affect areas of progressively lower saturation, effectively letting you increase
or decrease the saturation of lower-saturated features. Control points added to the right affect
areas of progressively higher saturation, letting you increase or decrease the most saturated
features of an image.
Like all curves, this operation is extremely useful for stylizing the image. You can create custom
vibrance operations, where you selectively increase the saturation of low-saturated regions of
the image in different ways to give the picture more “pop.” It’s also an excellent tool for taking
care of over-saturated areas of the picture when adhering to conservative QC requirements.
You can specifically desaturate only the most over-saturated parts of the picture, without
affecting similar hues at lower levels of saturation.
In the following example, you can see that the portion of the image with the highest saturation
has been desaturated, while the rest of the image has been left alone.
Desaturating only the highest saturated elements in the picture
by lower control points at the right of the Sat vs. Sat curve
Chapter – 118 Curves 2691