Xerox 8855, 8825, 8830 manual Determining document quality, What is a good quality document?

Document quality (continued)

Determining document quality

Some documents require additional adjustments to obtain the best copy quality. Documents of good quality are easy to scan and usually give good copies on the first attempt. Documents of bad quality may require more than one attempt, using different settings, to obtain the best copy quality.

What is a good quality document?

•If the document is white on black or white on blue, the foreground is clear white or nearly white, and the background is a solid, high-density black or dark color.

•The background is white or light-colored and is free of speckling or other noise. The background density is uniform.

•The document has no creases, folds, stains, tears or extraneous marks that the Scanner might interpret as foreground.

What is a bad quality document?

Bad quality documents often require special attention to achieve a usable image. Fortunately, the Synergix Digital Solution incorporates special image

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Background Foreground

processing technology that can extract acceptable images from documents degraded by many kinds of problems.

A bad quality document has one or more of the following problems:

•	The foreground is light (e.g., a faded or overexposed blueprint or light
	pencil lines).
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A good quality document has all of these characteristics:

•The contrast between the foreground (the image of interest) and the background is high. The foreground may be color or black.

•The foreground is a solid, high-density black or dark color (or dark blue on a blueline, or dark brown on a sepia). The foreground density is uniform. There is only one kind of foreground (e.g., there are no pencil additions on ablueline). If the document is of mixed type, the foreground is color.

The foreground has variable density (i.e., some parts are dark and some

parts are light).

• The foreground consists of two or more densities or colors (e.g., pencil

additions on an ink drawing, or pencil or ink additions on a sepia).

• The background is medium dark or dark (e.g., underexposed blueprint).

• The background has variable density.

• The background has speckles.

• The document has creases, folds, stains, tears, or extraneous marks that

the Scanner might interpret as foreground.

XES Synergix 8825/8830/8850/8855 Digital Solution User Guide 27