User`s manual

26 Microtek ScanWizard Pro for Mac OS X
White/Black Points Setup
This command provides you with advanced controls for setting the clipping
points for your white and black points, as well as determining the output levels
for the white/black points on your printer.
To use this feature:
1. Choose the White/Black Points Setup command from the Preferences menu.
2. As an alternative, you can click this command from the Color Correction
Menu. This is also the same thing as clicking the White/Black points tool in
the Settings window and then clicking the Setup button from the dialog box
that comes up. When the dialog box comes up, specify your preferences.
A. Auto Clipping
The Auto White Point Clipping and Auto Black Point Clipping fields allow you
to specify the percentage by which the white and black points, respectively, can
be clipped from the histogram. The clipping is done after you click the Auto
button in the AIC White/Black Points dialog box.
For example, if you specify 10 percent as your White Point clipping value and
then click the Auto button, the white point on the histogram is adjusted so that
10 percent of the color information is "clipped" or ignored. The resulting 90
percent information leftover is then remapped, resulting in an image with less
highlight detail.
The same principle above applies to the Auto Black Point Clipping feature,
which governs the black point for shadows.
These fields are normally used by more advanced users, and the features are
taken care of automatically if you have set up Color Matching correctly early on
in ScanWizard Pro.
LCH Color Mode
Native Color Mode