Microtek ArtixScan M1 Pro User Manual page 37

Use the White & Black Points tool to set
the shadow and highlight points of an
image, as well as to neutralize the color
cast in shadow/highlight regions.
In the example below, the original has a
slight color cast in the shadow and
highlight portions of the image. With the
use of the auto neutralizing and auto
adjustment features, the color cast is
removed, and the shadows and highlights
are remapped accordingly.