Visioneer PAPERPORT 5.0 SOFTWARE FOR MACINTOSH, User Manual

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2: Scanning Items
24
Table
of Contents
A
BOUT
B
IT
D
EPTH AND
R
ESOLUTION
Two factors that define a scan mode are bit depth and resolution.
Bit depth refers to the number of bits that the PaperPort software uses to
recreate the paper image on the screen. The greater the bit depth, the
more colors and shades of gray that are possible in the image.
When you scan a color or grayscale image, the scanner reproduces the
image’s colors or grayscale based on the bit depth setting.
Resolution refers to the sharpness of the image and is measured in dots
per inch (dpi). The higher the dpi, the greater the image’s resolution. But
as resolution increases, so does the file size and the length of time to scan
an item. Therefore, use the higher dpi settings only when necessary.
In addition to bit depth and resolution, the PaperPort software provides
the SharpPage option. This option optimizes the scan for items that you
scan in black and white (1 bit) and want to fax or convert using the
PaperPort software’s OCR. SharpPage enhances the scan of an item that
has colored text on colored background, so that the scanned image is
more readable.
1 bit provides the fewest levels of gray and
produces a black-and-white image that is best
for letters and articles.
8 bit produces an image that can have up to 256
shades of gray or colors.
24 bit produces an image in millions of colors.