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18 VISIONEER STROBE XP 450 SCANNER INSTALLATION GUIDE
select the Custom option from the drop-down list, boxes appear in
place of the picture. Enter the horizontal and vertical page
dimensions in the boxes.
AutoCrop—This option lets the scanner automatically determine
the size of the item being scanned. For example, if you scan an
unusual page size, the scanner will automatically determine the size
of the page.
DeScreen—Select this option when scanning a picture from a
newspaper or magazine article, or other items that contain images
with patterns or dots. These patterns and dots sometimes cause a
wavy appearance for which the Descreen option can compensate.
The following example shows the effect of descreening a scanned
image from a magazine article.
The scanning may slow down a bit when descreen is selected. The
DeScreen setting does not apply to the Black/White mode.
Gamma—Drag the slider to improve how the colors in a scanned
image look on your monitor. Gamma correction allows you to
achieve precise color matching. Because the computer cannot
always transmit the exact color information to the hardware, you
may have to make some color adjustments using the Gamma
feature.
The default Gamma setting works fine in most cases and normally
does not need to be adjusted.
6. Click OK to save the new configuration.
On the Configuration dialog box, make sure the configuration you
just defined is selected.
Original Image Descreened Image