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XEROX WIDE FORMAT COPY SYSTEM Image Quality • 47
Background Suppression
The Background Suppression enables you to make adjustments for
documents that contain poor contrast between the foreground image and
the background. Background Suppression monitors the pre-scan
image, to ensure the best image quality possible. In the PRODUCTIVITY
mode, there is no prescan, therefore Background Suppression is done
while the document is being scanned.
NOTE: The scan system uses the first few inches of a document to
determine the background suppression. If the first few inches of the
document being scanned are not representative of the entire document,
either too much or too little of the background will be removed. If this
occurs, try physically turning the document 90 degrees and scan it again.
Continue with this until an edge is found that produces a good scan.
Four choices are provided:
NOTE: Off is the only choice for Photo and Color Scanning. Scanning
low contrast documents with background suppression OFF will produce
washed out images. When scanning these documents, background
suppression should be set to AUTO or DARK.
Off This setting disables Background Suppression. It produces a
document that reproduces all the characteristics of the original
document with minimum alteration. Choose this selection when:
• The lead edge of the document is very different from the rest
of the document (e.g., the lead edge contains a black border).
• Maps with grayscale or color content may copy best in this
mode.
• To retain more light color information such as light gray or
yellow.
(Light) This setting works best for documents on translucent or
transparent media, such as vellum (tracing paper) or film, or with
medium levels of colored background on opaque media or for
documents. Such documents have a higher contrast between the
foreground and background than dark documents, but less
contrast than normal documents.
(Dark) Use this setting for documents with a dark background or
with medium contrast between the foreground and background. In
this mode, the background is not suppressed, but the foreground
image is improved to increase the contrast.
Auto (factory default) - The Scan System automatically adjusts the
image quality parameters to obtain the best copy.
NOTE: All three Background Suppression settings can be adjusted
further by changing the contrast setting in the Image Quality, Copy
area.