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Chapter 2

52 VirtualReScan (VRS) User’s Guide

setting in black and white mode does not affect the value of the manual brightness

setting in grayscale or color mode, because VRS keeps these values separate.

Contrast Text Box

When the VRS Interactive Viewer is launched, the Contrast numeric text box indicates

the current value of the Contrast setting. The Contrast value of an image may be set

manually using the Contrast numeric text box. The Contrast value may be set from 0

(very low contrast) to 100 (very high contrast). Similar to the Brightness setting, the

Contrast setting is not shared between black and white, grayscale, and color modes.

You must enter a separate Contrast value for each mode.

Gamma Slider and Gamma Correct Text Box

The Gamma slider and Gamma numeric text box indicate the current value of the

Gamma setting, which can range from -100 (very dark gamma) to +100 (very light

gamma). Gamma may be set for black and white, grayscale, and color images, but is

only shared between black and white and grayscale modes. This means that changing

the value of the Gamma setting while in black and white mode also changes the

Gamma setting for grayscale mode because VRS internally uses a single value to

represent gamma for black and white and grayscale.

The Gamma setting is not shared between non-color and color modes. Changing the

value of the Gamma setting in black and white mode does not affect the value of the

Gamma setting in color as VRS uses a dedicated value to represent color gamma.

Advanced Clarity (VRS Professional only)

The Advanced Clarity function is available for challenging documents that cannot be

processed adequately with the standard brightness/contrast adjustments and

thresholding.

Figure 2-37. Advanced Clarity Setting

For example, you may notice that some airline tickets produce less than optimal

image quality results when they are scanned with the default VRS settings, because

the patterned background is dense and difficult to suppress. With the Advanced

Clarity feature enabled, VRS can process the background successfully and produce

optimal results.

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Kofax UP-D005-0001 Guía de usuario Pagina 62