User's Manual

Scanning and Configuring OneTouch
Xerox
®
DocuMate
®
4799
User’s Guide
6-39
• Reduce Moiré patterns—moiré patterns are wavy, rippled lines that sometimes appear on the scanned
images of photographs or illustrations, particularly newspaper and magazine illustrations. Selecting Reduce
moiré patterns will limit or eliminate moiré patterns in the scanned image. This option is only available when
scanning in Color or Grayscale at lower resolutions, and when the scanner supports this feature.
If you are scanning using an Automatic Document Feeder, and the page is fed through at too great of an
angle, the image may not straighten correctly. In that case, re-scan the page using the paper guides to feed
the paper in straight.
• Invert image—reverses the color of each pixel in the scanned image.
When scanning in black and white, each pixel is reversed from black to white and white to black. When
scanning in grayscale each pixel is reversed to the opposite level of gray. When scanning in color each pixel is
reversed to the opposite color in the color wheel.
For example, you might choose this option if you are scanning pages that have been printed from newspaper
microfilm. Newspaper microfilm reverses black and white so that when viewed on a monitor, the text is white
and the paper is black.
The following example shows the original grayscale image and the inverted image.
The following example shows the original color image and the inverted image.