Microtek ArtixScan 120tf Reference Manual page 75

Image assigned " Standard" image category
In the example above, an overexposed
original is shown in two different image
categories. Because the original was
overexposed to begin with, choosing the
Overexposed image category had the result of
neutralizing the exposure, resulting in a
better image.
The same original did not fare as well when it
was assigned the Standard image category
(too bright overall, not enough contrast),
66 Microtek ScanWizard Pro TX for Mac & PC
Image assigned " Overexposed" image category
because this image category is best used for
originals of fairly good quality (sharp, neither
underexposed nor overexposed) and not, in
this case, for an original with flawed
exposure settings.
This example then shows the importance of
choosing the correct image category that
corresponds most closely to your original to
obtain optimal results.