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27
27
Chapter 3
Scanning
The Grayscale options express varying shades of gray between white and
black. The Grayscale (8 bit) option can express shades within a range of 256
gradations and the Grayscale (12 bit) option within a range of 4,096
gradations.
Note: If you attempt to use the Color (36 bit) or Grayscale (12 bit)
options to scan an image with a software application that
does not support these options, the system may hang up.
Before you use either 36 bit or 12 bit grayscale, check the
specifications of the parent software application to confirm
whether these options can be used. You can use Color (36 bit)
and Grayscale (12 bit) with Photoshop Ver. 4.0 or later and
with Photoshop LE enclosed with this package.
If you scan an image with a version of Photoshop compatible with 36 bit color
and 12 bit grayscale, the image is scanned as a 16 bit Channel Mode image.
Selecting Scan Resolution
Using the Scan Resolution list, you can select the resolution of a scanned
image based on the selected output device. This resolution becomes the base
on which changes to image size and scale are calculated.
The resolution you choose depends on the limits of the printer or other
output device. However, you can also select a custom resolution and make
more specific resolution choices.
Note: The maximum resolution of the scanner is set at 600 dpi when
the optional automatic document feeder (ADF) is installed.
Selecting a Preset Resolution
The list of preset resolutions should cover most of your scanning needs.
Available resolution settings depend on the capabilities of the acquiring
application.
To select a preset scan resolution:
Select an option from the Scan Resolution list.
Depending on your selected device, you have different resolution choices. For
example, if the acquiring application is configured to print the image, your
choices may be limited to the printer’s maximum resolution.