20 June 2005
IMAGE PROCESSING
6-31
Detailed
Descriptions
6.5.10 INDEPENDENT DOT ERASE
Independent dot erase (set with the SP mode settings listed in the table below)
remains in effect even when a “Custom Setting” is selected with the User Tools.
Independent dot erase targets for elimination random, irregular shaped black dots
on the surface of the original that would otherwise appear in the copy after
scanning and printing. The strength of the application of this feature can be
adjusted for each mode.
The filter compares each pixel with the pixels around an area 7 pixels x 7 lines. If
the sum of the pixels at the edges is smaller than the threshold value, the object
pixel is changed to zero (white). depending on the strength of the SP mode setting.
Setting a larger setting increases the number of dots erased, but if set too high, this
SP can also remove small or fine text characters or even portions of large text
characters.
Mode
Independent Dot Erase Filter
Default
Range
Text SP4903
60
5
Text/Photo SP4903
62
0
Pale
SP4903 63
0
Generation Copy
SP4903 64
8
0 ~ 15
NOTE:
The “0” setting switches off the filter.