Despeckle
Occasionally small dots or specks appear in the background of
a scanned image. Remove unwanted speckles provides a
cleaner image for OCR (Optical Character Recognition)
processing, and also helps to reduce compressed file size.
Define the speckles (also known as image noise) you wish to
remove by specifying its number (size) and radius (range). The
measuring unit is pixel. The higher the number, the more
speckles will be removed.
Before Despeckle
(noise number:0, noise radius:1)
After Despeckle
(noise number:22, noise radius:10)
4-52
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 ...