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Chapter 2

22 VirtualReScan (VRS) User’s Guide

Brightness Out of Range

Use the Brightness Out of Range threshold to define the valid range for brightness

values. When a document is scanned, VRS evaluates the resulting image to determine

its brightness. Then, VRS compares the actual brightness value to the user-defined

acceptable range. The acceptable range is determined by starting with 50 and adding

and subtracting the Brightness Out of Range threshold value listed on the Warnings

tab. Based on this real-time evaluation, VRS either accepts the image and allows it to

be passed on to the scanning application, or intercepts it and responds according to

the Action setting in the Warnings tab. The detected value for brightness is reported

on the status bar in the VRS Interactive Viewer.

For example, if the Brightness Out of Range threshold is 10 on the Warnings tab, VRS

accepts any image with a detected brightness value ranging from 40 to 60. The range

starts at 40, which is 10 less than 50, and it ends at 60, which is 10 more than 50.

Therefore, an image with a brightness value of 70 would fall outside the valid range.

VRS would respond by taking the action listed on the Warnings tab for Brightness

Out of Range. Refer to Figure 2-14 on page 21.

Contrast Out of Range

Use the threshold to define the valid range for contrast values. When a document is

scanned, VRS evaluates the resulting image to determine its contrast. Then, VRS

compares it to the user-defined acceptable range. The acceptable range is determined

by starting with 50 and adding and subtracting the Contrast Out of Range threshold

value listed on the Warnings tab. Based on this real-time evaluation, VRS either

accepts the image and allows it to be passed on to the scanning application, or

intercepts it and responds according to the Contrast Out of Range action setting in the

Warnings tab. The detected contrast value is listed on the status bar in the VRS

Interactive Viewer.

For example, if the Contrast Out of Range threshold is 15 on the Warnings tab, VRS

accepts any image with a contrast value ranging from 35 to 65. The range starts at 35,

which is 15 less than 50, and it ends at 65, which is 15 more than 50. Therefore, an

image with a contrast value of 25 would fall outside the valid range and generate a

warning. VRS would respond by taking the action listed on the Warnings tab for

Contrast Out of Range. Refer to Figure 2-14 on page 21.

Color Confidence Out of Range

Use this threshold to define the valid range for color confidence values. When a

document is scanned, VRS evaluates the image to determine if it is color or bitonal.

VRS also determines how confident it is that the correct assessment was made. The

confidence level is expressed as a percentage that appears in the status bar of the VRS

Interactive Viewer.

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Kofax UP-D005-0001 Guía de usuario Pagina 32