Brother MFC-9420CN - Manual (Page 114)

Scanning
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8
Settings in the Scanner window
Image
Resolution
From the Resolution pop-up menu choose the scanning resolution. Higher resolutions use more memory
and transfer time, but produce a finer scanned image. The following list shows the resolution you can choose.
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100 x 100 dpi
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150 x 150 dpi
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200 x 200 dpi
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300 x 300 dpi
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400 x 400 dpi
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600 x 600 dpi
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1200 x 1200 dpi
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2400 x 2400 dpi
■ 4800 x 4800 dpi
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9600 x 9600 dpi
Color Type
Black & White — Set the image Type to Black and White for
text or line art. For photographic images, set the image type
to Gray (Error diffusion) or True Gray.
Gray (Error Diffusion) — is used for documents that have
photographic images or graphics. (Error Diffusion is a method
for creating simulated gray images without using true gray
dots. Black dots are placed in a specific pattern to give the
appearance of gray.)
True Gray — is used for documents with photographic
images or graphics. This mode is more exact because it uses
up to 256 shades of gray. It requires the most memory and
takes the longest transfer time.
Colors — Choose either 8-bit Color, which scans up to 256 colors or 24-bit color which scans up to 16.8
million colors. Although using 24-bit color creates an image with the most accurate colors, the image file will
be about three times larger than a file created with 8-bit Color.