User’s Manual
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 AD6090
Page 1: ...Prodution Scanner User s Manual Regulatory model FT 1906H Avision Inc...
Page 12: ...User s Manual 1 5 1 4 Removable Parts ADF Roller Reverse Roller Pick up Roller...
Page 27: ...User s Manual 3 3 Document Feeding 1 Unfold the document feeder...
Page 42: ...User s Manual 4 5...
Page 51: ...User s Manual 4 14 Error Diffusion Image Dynamic Threshold Dynamic Threshold AD...
Page 54: ...User s Manual 4 17 Normal Photo Document Threshold 230 Normal Photo Document Threshold 230...
Page 67: ...User s Manual 4 30 The Compression tab dialog box...
Page 71: ...User s Manual 4 34 The Color Dropout dialog box...
Page 136: ...User s Manual 7 13...
Page 138: ...User s Manual 7 15 3 Align the tab position and lift the tab UP as shown...
Page 139: ...User s Manual 7 16 4 Close the ADF Roller Cover...
Page 141: ...User s Manual 7 18...