Reference: The Preview Window 23
White/Black Points Setup
The white point is a reference point that specifies the lightest area in an image,
while the black point is the darkest reference area. Likewise, black point is the
darkest reference area. This command provides you with an advanced setup
control for the clipping points of the white and black points of your scan jobs, as
well as determining the output levels for the white/black points on your printer.
The settings may be accessed and revised any time during scanning when
performing image adjustments with the White/Black Points AIC tool (available
from the Settings window or Correction Menu). You need to click the Setup
button from the AIC dialog box in order to display the White & Black Points
Setup window.
Auto Clipping tab
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 White/Black Points dialog box.
For example, if you specify 5 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 95
percent information leftover is then remapped, resulting in an image with less
highlight detail. The same approach applies for the Black Point clipping value,
except that it 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 TX.
(Macintosh) (Windows)
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