
4-15
Threshold
Used to convert a grayscale image to a
bi-tonal image. The value ranges from 0 to
255. A low threshold value produces a lighter
image, and can be used to subdue
backgrounds and subtle, unneeded
information. A high threshold value produces
a darker image, and can be used to help pick
up faint images.
Adjust the threshold setting by dragging the
Threshold sliding bar to the left or right to
achieve the desired threshold setting.
200 dpi,
Threshold:50,
Brightness: 0
200 dpi,
Threshold:100,
Brightness: 0
Summary of Contents for AD345GF
Page 1: ...Document Scanner User s Manual Regulatory model DL 2011B Avision Inc...
Page 27: ...3 11 Document Feeding 1 Unfold the document feeder and its extension 2 Raise the paper stopper...
Page 42: ...4 5...
Page 51: ...4 14 Error Diffusion Image Dynamic Threshold Dynamic Threshold AD...
Page 54: ...4 17 Normal Photo Document Threshold 230 Normal Photo Document Threshold 230...
Page 67: ...4 30 The Compression tab dialog box...
Page 71: ...4 34 The Color Dropout dialog box...
Page 140: ...7 17 3 Move the belt UP as indicated 4 Move the tab of the ADF roller DOWN as indicated...