Revision Record
Rev. No. Date Action
0 12-10-95 Original draft.
1 05-24-96 Added sections 1-4 and Appendices A & B
1 SYSTEM OVERVIEW
The CF Series Scanner is a highly versatile data capture device, providing choices in speed and
resolution and producing high quality data. It also allows a choice between using a fixed threshold or an
adaptive threshold. An adaptive threshold takes into account variations in the shading of the media to
yield consistently good results, even from less than optimal documents. See Figure 1-1 for an
illustration of the scanner.
SCAN-GRAPHICS accomplished this in a way which makes the CF Series Scanner as easy to
use and maintain as possible. Care has been taken in the design and manufacture of the unit to build in a
strength which will keep the scanner operating reliable for years.
The CF Series Scanner can accommodate documents with widths up to 44 inches (the maximum
active scan area is 43 inches). The scanner does not limit the length of the document.
Although the technology employed by the CF Series Scanner is very complex, its function can be
described in quite simple terms. It consists of a set of cameras focused on a narrow window; lamps to
illuminate the document; a transport system which moves the document past the window; and the
electronics to convert the data captured by the cameras into a useful form.
