Adaptec 1542CP - Storage Controller Fast SCSI 10 MBps Uživatelská příručka stáhnout pdf (Strana 320)

A-63054 February 2004 9A-29

Using Image Setup

with the

i800 Series Scanners

Image Setup for i800 Series Scanners provides four tabs: Filters, Check,

Mask, and Color Dropout. Following are descriptions of these tabs.

NOTE: The Delete button on the Image Setup dialog box allows you to delete

an image setup and remove it from the list of available image setups.

i800 Series Scanners

Filters tab

The Filters tab is different for bitonal and color image setup.

Filters tab for

bitonal image setup

Threshold—threshold controls the lightness and darkness of the

background in an image. As the threshold value increases, more of the darker

grays in the image turn black. As the threshold value decreases, fewer darker

grays turn black. Enter a value between 0 and 255. The default is “90.”

Contrast—contrast enhances the edges contained in a document.

Increasing the contrast level sharpens the image edges. Decreasing the

contrast level softens the image. Enter a value between 0 and 100. The

default is “62.”

iThresholding—click to enable iThresholding. When

iThresholding is enabled, the i800 Series Scanner automatically determines

the optimal Threshold setting for each scanned page, thereby improving

overall scanning productivity and image quality. With the iThresholding feature,

the need to make adjustments to the Threshold setting when scanning mixed

documents of different colored or shaded backgrounds is greatly reduced.

NOTE: When iThresholding is enabled, the Threshold and Image processing

settings are grayed out. The scanner will automatically perform

Adaptive thresholding processing and will determine the optimal

Threshold setting.

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Adaptec 1542CP - Storage Controller Fast SCSI 10 MBps Uživatelská příručka Strana 320