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86 VISIONEER ONETOUCH 9420 USB SCANNER USER’S GUIDE
3. Click Reset to return the resolution to its original setting.
The resolution panel also includes an advanced setting for Moire
patterns. Moire patterns are wavy, rippled lines that sometimes appear
on the scanned images of photographs or illustrations, particularly
newspaper and magazine illustrations. To scan the image and limit or
eliminate moire patterns, select the Reduce Moire option.
ADJUSTING THE BRIGHTNESS AND CONTRAST
Sometimes an item is scanned with the brightness and contrast set to be
too light or too dark. For example, a note written with a light pencil
may need to be scanned darker to improve legibility.
The following figure shows the brightness and contrast options.
Contrast is only available for Color and Gray Scale configurations.