Brother MFC 8220 - Manual (Page 51)

HOW TO SCAN USING WINDOWS ® 3 - 7
Scan Type
Brightness
Adjust the settings (-50 to 50) to obtain the best image. The default
value is 0, representing an ‘average’.
You can set the level by dragging the slide bar to the right or left to
lighten or darken the image. You can also type a value in the box for
the setting.
If the scanned image is too light, set a lower brightness value and
scan the original document again. If the image is too dark, set a
higher brightness value and scan the original document again.
Contrast
This setting is adjustable only when you have selected one of the
gray scale settings. It is not available when Black & White settings
are selected as the Scan Type.
You can increase or decrease the contrast level by moving the slide
bar to the left or right. An increase emphasizes dark and light areas
of the image, while a decrease reveals more detail in gray areas. You
can also type a value in the box for the setting.
Black & White: Set the Scan Type to Black & White for text or
line art.
Gray Scale: Set the Scan Type to Gray or True Gray for
photographic images.