Tonal Adjustment - Mustek 600 CP User Manual

Tonal Adjustment

UK-14 Flatbed Scanner User' s Guide
Once you have scanned an image and viewed the results, you can
use the Tonal Adjustment commands to improve the quality of
succeeding scans and thereby optimize your scanner's output.
These commands are brightness, contrast, and gamma. To use
Tonal Adjustment, the steps are:
1. Click the Tonal Adjustment icon. The Tonal Adjustment dialog
box appears.
2. Open the Master menu box and select the channel you wish to
modify. Choose Red, Green, or Blue. Choosing Master means
changes will be applied to all three channels equally and
simultaneously.
3. Drag the scroll bars or type into the entry boxes to modify:
• Brightness - measures the overall amount of white in an
image.
• Contrast - measures the range of gray shades in an image.
• Gamma - selectively adjusts brightness in the hilight,
shadow and midtone areas of an image. Values of 0.1 to
2.0 will primarily affect the shadow areas of your image.
Values of 2.1 to 6.0 will primarily affect the midtone
areas and values of 6.1 to 7.9 will primarily affect the
hilight areas.
4. Click Preview to see the effect of your changes to the
preview image. Readjust the settings if necessary. Click Reset
if you want to discard the changes and go back to the original
image.
5. Click OK when you're finished making adjustments. The Tonal
Adjustment dialog box closes and you can proceed to scan the
image.