Brother DCP-8155DN - Manual (Page 174)

Scanning
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Settings in the Scanner window
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Resolution
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You can change the scanning resolution from the Resolution pop-up menu. Higher resolutions take more
memory and transfer time, but produce a finer scanned image. The following table shows the resolutions you
can choose and the available colors.
Scan Type
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 Black & White
Use for text or line art images.
 Gray (Error Diffusion)
Use for photographic images or graphics. (Error Diffusion is a method for creating simulated gray images
without using true gray dots. Black dots are put in a specific pattern to give the gray appearance.)
 True Gray
Use for photographic images or graphics. This mode is more exact because it uses up to 256 shades of
gray.
 256 Color
Uses up to 256 colors to scan the image.
Resolution Black & White/
Gray (Error Diffusion) 256 Color True Gray/24bit Color
100 x 100 dpi Yes Yes Yes
150 x 150 dpi Yes Yes Yes
200 x 200 dpi Yes Yes Yes
300 x 300 dpi Yes Yes Yes
400 x 400 dpi Yes Yes Yes
600 x 600 dpi Yes Yes Yes
1200 x 1200 dpi Yes No Yes
2400 x 2400 dpi Yes No Yes
4800 x 4800 dpi Yes No Yes
9600 x 9600 dpi Yes No Yes
19200 x 19200 dpi Yes No Yes