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Use r’s Man ua l
4- 60
Despeckle
Occasionally sm all dot s or specks appear in t he background of
a scanned im age. Rem ove unwanted speckles provides a
cleaner im age for OCR (Opt ical Character Recognit ion)
processing, and also helps t o reduce com pressed file size.
Define t he speckles ( also known as im age noise) you wish to
rem ove by specifying it s num ber ( size) and radius ( range) . The
m easuring unit is pixel. The higher t he num ber, the m ore
speckles will be rem oved.
Before Despeckle
( noise num ber: 0, noise radius: 1)
After Despeckle
( noise num ber: 22, noise radius: 10)
N ote:
The funct ion is currently available for Black and Whit e
im age only.
To scan at rat ed speed, it is recom m ended t o set t he
noise radius up t o 10 pixels.
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