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114
Other Image Options
Binarization
This is the process of converting a grayscale or color image to
a bi-tonal image. There are several different methods of
performing this conversion. Options: Dynamic
Threshold, Fixed Processing, Halftone 1~5, Error
Diffusion.
Dynamic Threshold: Selecting Dynamic Threshold
allows the scanner to dynamically evaluate each document to
determine the optimal threshold value to produce the highest
quality image. This is used to scan mixed document
containing faint text, shaded background, or color
background with a single setting. If Dynamic Threshold is
selected, Threshold, Brightness, and Contrast are not
available.
Dynamic Threshold (AD): Selecting Dynamic Threshold
(AD) to perform the enhanced mode of the Dynamic
Threshold feature. However, using this mode may slow down
your scanning speed.
Sensitivity of Dynamic Threshold
Occasionally your scanned image may contain small dots or
speckles. To remove these spots, increase the sensitivity
value by moving the bar to the right. The value ranges from
1 to 30. The default is 20.
Fixed Processing: Used for black-and-white and other high
contrast documents. A single level is set to determine the
black-and-white transition. The threshold is programmable over
the entire density range. Fixed Processing sets Contrast to 0.
If Fixed Processing is selected, Contrast is not available.
Halftone: In addition to the black and white display, Halftone
can present a somehow gray shade of image by using different
size of dots. Halftone image looks like the picture we have seen
in the newspaper. Options include Halftone 1, Halftone 2,
Halftone 3, Halftone 4, Halftone 5.
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