Kofax vrs4 User Manual

Operating VRS

VRS User’s Manual

When used with some scanners (old or new) that run more slowly while scanning in 

grayscale mode, VRS may appear to be responsible for the slowdown. The perception 

is that the application is requesting a bitonal image and VRS is causing the scanner to 

run more slowly than usual. In reality, the scanner is running at its rated speed in 

grayscale mode, rather than bitonal mode. Most users accept this slight slowdown 

because the image quality produced by VRS far outweighs the reduced throughput. 

If you prefer your scanner to run at, or near, rated bitonal speed, you can use the 

setting on the Accelerated Scanning tab to accelerate the scanner and experience only 

a slight reduction in image quality. 

With some scanners, the Accelerated Scanning setting has no effect. 

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.