Brightness; Contrast - Ricoh IS450DE Operator's Manual

SCANNER FEATURES

Brightness

Function Adjusts the brightness value between 1 and 255. A high brightness
setting results in a lighter overall image, while a low brightness
setting results in a darker overall image.
Usage
When scanning a dark image, the darker area may display as deep
black, even though it has gray scales. When this occurs, increase
the brightness setting to allow the shades of to gray appear. When a
lighter image displays as pure white, decrease the brightness
setting
Lower

Contrast

Function Adjusts the contrast value between 1 and 255. A high contrast
setting emphasizes black and white, leaving few middle gray
shades, while a low contrast setting emphasizes middle gray
shades at the expense of black and white.
Usage Set the contrast to a higher value for sharp contrast, and a lower
value for a soft image.
Lower
A-12
Higher
Higher