White & Black Points Tool - Microtek ArtixScan 4500t Reference Manual

White & Black Points tool
The White & Black Points tool is used to change the shadow and highlight points
of an image. (See note on next page for additional descriptions.)
By using this tool, you can manipulate an image to either bring out the highlights
in a very dark image, or bring out more of the shadows in a very light image.
The White & Black Points tool can also be used to neutralize the color cast in
the highlight and shadow regions.
Drag sliders to
define custom
shadow and
highlight
settings
Enter custom Lightness,
Chroma & Hue values for
Shadow (Black area) here.
C & H values are applicable
only when the Auto
Neutralize - Shadow
check box is enabled.
86 Microtek ScanWizard Pro for Macintosh
Click to let ScanWizard
Pro determine the
shadow and highlight
points automatically
Enter custom Lightness, Chroma &
Hue values for Highlight (White area)
here. C & H values are applicable
only when the Auto Neutralize -
Highlight check box is enabled.
Observe
histogram values
for distribution of
the Lightness "L"
channel in the
image, as cursor
is swept around
histogram
Check to auto
neutralize unwanted
color casts in
Shadow (black) area
or Highlight (white)
area
Click to bring up the
White/Black points
setup dialog box. For
more details, see the
section titled White &
Black Points Setup
(under the
Preferences menu in
the Preview
window).