Xerox 5101, 6279 manual What is a good quality document?, What is a bad quality document?

3 Document Quality

What is a good quality document?

4" 4"

A good quality document has all of these characteristics:

Background Foreground

•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 a blueline). If the document is of mixed type, the foreground is color.

•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 Scan System might interpret as foreground.

What is a bad quality document?

Bad quality documents often require special attention to achieve a usable image. Fortunately, image processing technology is incorporated 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).

•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 Scan System might interpret as foreground.

Wide Format Copy System User Guide 43