Independent Dot Erase - Ricoh B291 Service Manual

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
Text
Text/Photo
Pale
Generation Copy
NOTE: The "0" setting switches off the filter.
SM
CÓPIA NÃO CONTROLADA
Independent Dot Erase Filter
SP4903 60
SP4903 62
SP4903 63
SP4903 64
6-31
CÓPIA NÃO CONTROLADA
IMAGE PROCESSING
Default Range
5
0
0 ~ 15
0
8
B291/B295/B296/B297