A-61560 January 2007
87
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Adaptive Thresholding (ATP):
separates the foreground
information in an image (i.e., text, graphics, lines, etc.) from the
background information (i.e., white or non-white paper background).
When using Adaptive Thresholding, Brightness and Contrast can be
adjusted.
Brightness
— changes the amount of white in the color and grayscale
image. Use the slider to select a value from 0 to 255. The default is 90.
Contrast
adjusts the difference between black and white, thereby
making an image sharper or softer.
The difference between black and white is small with a low contrast
setting, so the image is softer. With a high contrast setting, the
difference between black and white is large, so the image is clearer.
Select a contrast value from
-50
to
50
. The default is 0.
Brightness: 50
Brightness: 127
