Microtek ScanMaker i700 User Manual page 77

Threshold tool
Using the Threshold feature:
1. Drag the sliders to change the Threshold.
To darken the original, drag the slider
increases the Threshold value so that more pixels are turned to
black, resulting in a darker image.
To lighten the original, drag the slider
the Threshold value so that more pixels are turned to white,
resulting in a lighter image. Take note that both Darken and
Lighten controls use the same slider (the black slider).
2. Alternatively, you can enter a value in the Threshold edit box to
change the Threshold.
3. The Sharpen option lets you sharpen the Line Art image.
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