User Guide

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4-20 ScanWizard Pro TX User’s Guide

Using the Tone Curve Tool

The

one Curone Cur

one Cur

veve

ve 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.

1. Insert the film holder with the image to be cor-

rected into your scanner.

2. Click the

OverviewOverview

Overview button to start a thumbnail

overview of all your originals in the

Job PanelJob Panel

Job Panel

window, then click on the thumbnail to select the

image. If thumbnail overview is not required

(

OverviewOverview

Overview skipped), click directly on the imageless

frame position in the

Job PanelJob Panel

Job Panel. Then click the

Prescan Prescan

Prescan button to obtain a prescan image.

3. Click the

one Curone Cur

one Cur

ve ve

ve tool in the

Settings Settings

Settings window.

The

AIC:TAIC:T

AIC:T

one Curone Cur

one Cur

veve

ve dialog appears.

4. Select

CurveCurve

Curve as your “Method”.

5. Select

Yellow Yellow

Yellow as your “Channel”, and adjust the

yellow channel by moving the curve slightly higher

and towards the left, as shown in the figure on next

page.

6. Select

MagentaMagenta

Magenta as your next “Channel”, and do the

same thing you did with the yellow channel, mov-

ing the curve slightly higher and towards the left.

7. Check the

PreviewPreview

Preview box so that the prescan image

in the

PreviewPreview

Preview window is updated with the latest

correction. The update is done in the background

and so may take a few moments to show.

8. Click OK to confirm the correction.

Image corrected with Tone Curve tool

Original image