Filter
Top Products
A-61517 October 2004 4-20
Noise Filter
Occasionally small dots or specks appear in the background of a
scanned image. These specks increase file compression size and
usually contain no image information. Using the Noise Filter on
documents containing very fine detail (e.g., the dot on an "i" in 4-point
type) may cause information to be lost. It is recommended that you do
not use the Noise Filter when scanning documents with text smaller than
7-point type.
Noise Filter can be used with binary images only and is Front/Rear
independent. Choose None, Lone Pixel or Majority Rule.
• Lone Pixel reduces random noise on binary images by converting a
single black pixel surrounded by white to white or by converting a
single white pixel surrounded by black to black.
• Majority Rule sets the central pixel value in a matrix according to
the majority of white or black pixels in a matrix.
No Noise Filter Used Lone Pixel