User`s manual

100 Microtek ScanWizard Pro for Mac OS X
Tone Curve tool (LCH & Native color mode)
Coordinates of
cursor position
within the grid
Click to create handles
from which to drag and
manipulate a portion of
the curve
The more handles are
created, the easier and
smoother it is to
manipulate the curve
To remove a handle,
drag the handle off the
graph or grid
The Tone Curve tool is used to adjust the tonal distribution of each channel of
an image. It functions very much like the Gradation tool, except that it provides
additional functions to allow separate adjustments of the tones in each RGB or
CMYK channel, depending on the image type. This tool is especially useful for
correcting the “ink percentage” distribution (i.e., dot gain correction) in CMYK
images.
In the example here, the original image looks cold, with a decidedly blue-green
cast to it. The solution: Increase the “ink percentage” of the yellow and
magenta channels to bring out the warmer tones.
For details on how to read the tone curve, see the section on how to use the
Gradation tool.
Load a previously
saved tone curve for
use with another
image. Photoshop-
saved curves can also
be loaded
Choose the kind of
curve you wish to have.
Select from Curve,
Line, or Gamma
Choose the color
channel in which the
gamma will be affected
Save a tone curve
together with its settings
so that the curve can be
used in the future if
necessary