Xerox XDM5205DWU Installation Guide - Page 53

Curves, To adjust the gamma curve

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Scanning from PaperPort Curves Like the Highlight/Shadow levels, the Curves feature also adjusts the range of midtone colors on an image. However, with the Curves feature you can set the gamma individually to adjust midtone levels without losing details from the lightest or darkest areas. To adjust the gamma curve: 1. Click the Curves button. The dialog box that opens shows a plot of the gamma. The gamma of the original image is represented by a straight line from the lower left to upper right corners. Changing the straight line to a curve changes the gamma setting for the midtones on the original image. 2. From the Channel drop-down list, choose RGB to adjust the gamma of all the channels together, or choose a single channel if available. 3. Drag the line up or down to set a new gamma. The input and output values represent values on the horizontal and vertical axes for the new gamma setting. Click the Curve or Line button to see the display as a smooth curve or a line. You can drag the line at multiple points. 4. Click Preview to see the effect of the new settings on the preview image. 5. Click Reset to reset the levels to their original values. 6. Click OK when the levels are what you want. DocuMate 520 Scanner Installation Guide 47

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DocuMate 520 Scanner Installation Guide
47
Scanning from PaperPort
Curves
Like the Highlight/Shadow levels, the Curves feature also adjusts
the range of midtone colors on an image. However, with the Curves
feature you can set the gamma individually to adjust midtone levels
without losing details from the lightest or darkest areas.
To adjust the gamma curve:
1.
Click the
Curves
button.
The dialog box that opens shows a plot of the gamma. The
gamma of the original image is represented by a straight line
from the lower left to upper right corners. Changing the straight
line to a curve changes the gamma setting for the midtones on
the original image.
2.
From the Channel drop-down list, choose
RGB
to adjust the
gamma of all the channels together, or choose a single channel
if available.
3.
Drag the line up or down to set a new gamma.
The input and output values represent values on the horizontal
and vertical axes for the new gamma setting. Click the
Curve
or
Line
button to see the display as a smooth curve or a line.
You can drag the line at multiple points.
4.
Click
Preview
to see the effect of the new settings on the
preview image.
5.
Click
Reset
to reset the levels to their original values.
6.
Click
OK
when the levels are what you want.