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SCANNING FROM TWAIN SOFTWARE 125
setting, the sharper and clearer the scanned image. However,
higher dpi settings take longer to scan and produce larger files for
the scanned images. Usually the higher resolution settings are
used for precision work, such as photographs or fine artwork.
■ Brightness and Contrast—Sometimes an image is scanned with
the brightness and contrast set too light or too dark. For
example, a note written with a light pencil may need to be
scanned darker to improve legibility. Increasing or decreasing the
brightness makes the scanned image lighter or darker. Contrast
refers to the difference between the lighter and darker portions of
the image. Increasing the contrast emphasizes the difference
between the lighter and darker portions, decreasing the contrast
de-emphasizes that difference. Contrast is used in conjunction
with brightness.
■ Deskew—Select this option to let the scanner automatically
determine if a page is skewed, and then straighten its image. The
scanner detects page edges and can sense when the page is fed
through at an angle. However, if the page is fed through at too
great an angle, the page will back out of the scanner
automatically. In that case, feed the paper in straight and re-scan
the image.
■ AutoCrop to Original—Select this option to let the scanner
automatically determine the size of the item being scanned. For
example, if you scan a 5" x 7" photo, the scanner will determine
the size of the photo, and the scan area is the size of that photo.
When using the AutoCrop to Original option, always use the paper
guides on the scanner so the page is not skewed.
Note: Also make sure to set the page size larger than the item that
you’re scanning so the Autocrop process will have sufficient room on
the page to crop the image properly.