Lum vs sat – Blackmagic Design DaVinci Resolve Advanced Panel User Manual
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Lum vs Sat
The Lum vs Sat curve is like the Custom curves in that alterations to the saturation of an image are
based on image tonality, rather then hue. In the following example, the Lum vs Sat curve is being used
to selectively decrease the saturation of everything falling into the highlights and shadows of the image,
while increasing the saturation of everything within the midtones.
This is an outstanding curve to use for creative effect, for example, slightly boosting saturation within
the midtones while reducing saturation in the shadows to increase the depth of the darkest portions of
the image. It’s also a great curve to use to solve QC violations. For example, if you have illegal saturation
in the highlights of an image, you can use the Lum vs Sat curve to lower the specific values that are
causing problems cleanly and smoothly.
Selective desaturation in the shadows and highlights, along with increased saturation in the midtones,
using the Lum vs. Sat curve; Top–original image, Bottom–altered image