Kodak i55 User Manual page 64

Adjust the Threshold setting by dragging the Threshold sliding bar to
the left or right to achieve the desired Threshold setting. Scan the
document to check the threshold.
200 dpi; 80 Threshold; 20 Contrast 200 dpi; 80 Threshold; 100 Contrast
Lighten, Normal and Darken are used as quick sets to adjust the
threshold. Lighten = 72, Normal = 90 and Darken = 128.
60 A-61527 May 2006