Microtek ArtixScan M1 Pro User Manual page 40

Use the Saturation Curve to increase or
decrease the color intensity (chroma or
saturation) of an image without altering the hue
and lightness values.
In the example below, the colors are not as rich
as they should be (notice the slightly muddied
wash to the overall image). The corrected image
shows deeper, richer tones, resulting in a more
vibrant, lifelike image.