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Use r’s Man ua l
4- 15
Thresh old Used to convert a grayscale im age t o a
bi- t onal im age. The value ranges from 0 t o
255. A low t hreshold value produces a
lighter im age, and can be used t o subdue
backgrounds and subtle, unneeded
inform at ion. A high threshold value produces
a darker im age, and can be used to help pick
up faint im ages.
Adjust the t hreshold set t ing by dragging the
Threshold sliding bar t o the left or right t o
achieve the desired threshold set ting.
2 0 0 dpi,
Thresh old:5 0 ,
Brightness: 0
2 0 0 dpi,
Thresh old:1 0 0 ,
Brightness: 0
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