User manual

25
User Guide – IRIScan
TM
Executive 4
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)
Note:
 The function is currently available for Black and White image only.
 To scan at rated speed, it is recommended to set the noise radius up to 10 pixels.
Background
Setting
This option allows you to set your scan background. Choice: White
Background, Black Background.
Note: For a sheet-fed scanner with an auto document feeder, this option is
currently available only in the “Auto crop” mode. For a scanner with a flatbed
platen, this option is available either in the “Auto crop” or the “Fixed to
Transport” mode.
For details on choosing the “Auto crop” or the “Fixed to Transport” mode,
please refer to section 4.5.1, Cropping.
White Background Black Background