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Use r’s M anual
4- 16
Gra y
Docum e n t Type: Choice: N orm a l, Photo, Docum ent
Three opt ions of docum ent t ype are provided when you choose
Gray as the im age type for your scanned docum ent . Choice:
N orm a l, Photo, D ocum e nt.
Docum e n t : Choose Docum ent if your original contains
pure t ext or a m ixt ure of text and graphic since it is an
optim al set ting for regular business docum ent . When
using Docum ent, only Threshold can be adj ust ed.
Phot o: Choose Phot o if your original contains phot o to
reproduce your photo in vivid grayscale im age. When
using Phot o, no Threshold and Cont rast can be adj ust ed.
N orm a l: When using Norm a l, Threshold, Bright ness, and
Cont rast can be adj ust ed.
Thresh old: The value ranges from 0 to 255. The default is
230. A low t hreshold value produces a lighter im age, and can
be used to subdue backgrounds and subt le, unneeded
inform ation. A high threshold value produces a darker im age,
and can be used to help pick up faint im ages. Adj ust t he
threshold set ting by dragging t he Th r e shold sliding bar to t he
left or right to achieve the desired threshold set t ing.
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