Avision AV261C User Manual page 19

4.2 Scanning Parameters & Image Control
Resolution: The number of dpi (dots per inch) that AV261C
Brightness: Adjusts the lightness or darkness of an image.
Contrast:
uses for a scan. Usually the greater the number,
the higher the resolution. Yet up to a certain
level, the resolution will not be visually increased
but the disk space will be increased.
The higher the value, the brighter the image.
Adjusts the range between the darkest and the
lightest shades in the image. The higher the
contrast, the bigger the different gray scales.
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