User’s Manual
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:80,
Brightness: 0
200 dpi,
Threshold:170,
Brightness: 0
4-11
Summary of Contents for DF-0902H
Page 1: ...High Speed Document Scanner User s Manual Regulatory model DF 0902H Avision Inc ...
Page 34: ...Error Diffusion Image 4 10 ...
Page 37: ...User s Manual Normal Photo Document Threshold 230 Normal Photo Document Threshold 230 4 13 ...
Page 48: ...The Compression tab dialog box 4 24 ...
Page 50: ...The Color Dropout dialog box 4 26 ...
Page 52: ...Remove Blue Threshold 20 Background 255 Remove Blue Threshold 20 Background Level 210 4 28 ...
Page 63: ...User s Manual Detection Area Outside the Range Box Top 3 Bottom 7 4 39 ...
Page 89: ...6 2 Roller ADF Pad ...
Page 95: ...6 8 5 Reinsert the paper feed roller cover and snap it into place 6 Close the ADF cover ...
Page 104: ...User s Manual 9 3 Normal Rotated 4 60 Transport Timeout 4 33 Ultrasonic Detection 4 40 ...