Canon ScanGear CS-S 4.3 User Manual page 40

CONTENTS
GLOSSARY
INDEX
Using Predefined Tone Curves
The Preset adjustments let you select an image correction by selecting the
problem with the image and letting ScanGear CS-S correct it with settings
that are designed to solve the most common problems with images:
overexposure, underexposure, or too high or too low a contrast.
To correct an image problem using predefined tone curves:
1. Click the Tone tab, then click the Custom Curve button.
2. To adjust the tone of a particular color (red, green, or blue), select the
color from the Channel list. Otherwise, leave the channel set to Master.
3. To have ScanGear CS-S automatically compensate for common problems
in an image, choose one of the following from the list:
• No correction
• Fix an image that is underexposed
• Fix an image that is overexposed
• Fix an image that is low contrast
• Fix an image automatically
• Edit custom curve
The preview image reflects the correction.
About the Curve Box
The Auto-curve button sets the curves to the automatic settings that best
display the current preview image. You can use the automatic curves as a
starting point, before editing a curve. You can then choose a channel to edit.
Using Custom Tone Curves
If you want to experiment with tones, try using the Custom Tone Curves.
In the graph window, the x-axis represents the input image, and the
y-axis represents the output.
Chapter 3
40
Scanning
40