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Chapter 2

26 VirtualReScan (VRS) User’s Guide

Figure 2-16. Accelerated Scanning Tab

You can use the slider to select a scanning acceleration level from None to Maximum,

while reducing the image quality from Best to Good. VRS performs the acceleration

by scanning a grayscale image at a lower resolution then what was requested by the

application. VRS performs its normal analysis on this image and produces a clean,

clear, bitonal image. VRS then scales this image up to the resolution requested by the

application, and this process affects the image quality. As you move the slider from

None (no acceleration) to Maximum, the difference between the requested resolution

and the actual scanned resolution is increased. At Maximum, the difference is the

greatest and as a result, the reduction in image quality is also the greatest.

For example, suppose you select 300 DPI in your scanning application and enable the

first level of Accelerated Scanning in VRS. The image scans at 200 DPI to accelerate

scanning speed and VRS translates it to 300 DPI to achieve the desired resolution.

Table 2-6 lists the DPI settings that VRS uses for a typical scanner. Use this table as an

example of how VRS treats DPI settings defined in a scanning application.

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Kofax UP-D005-0001 Guía de usuario Pagina 36