Gestetner A294, Руководство по обслуживанию

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IMAGE PROCESSING
A294/A295 2-28 SM
2.3.7 INDEPENDENT DOT ERASE
By default, this process is used in all image processing modes except for photo
mode. This function allows independent black dots appearing on copies to be
erased.
As shown in the drawing below, the software compares each pixel with the pixels in
the surrounding 5 x 5 area (except for the immediately adjacent pixels).
If all of the surrounding pixels are white, and the difference between the value of
the object pixels and the average of the surrounding pixel is larger than the
threshold level, the object pixel is either changed to 0 (white) or reduced in density.
The combination of the threshold value and the pixel data reduction ratio depends
on the setting of SP4-903-60, 62, 63 or 64. If a larger number is selected, the effect
of independent dot erase will be stronger. If 0 is selected, independent dot erase is
disabled.
2 0
3 0
3 0
0
3 0 3 0 4 0 3 0 2 0
6 0
3 0
3 0
4 0 2 0 3 0 4 0
2 0 1 0
5 0
0 3 0 7 0
2 0 3 0 0
5 0
Object pixel
Surrounding pixels to be used for
calculation
Ignored pixels
A294D592.WMF
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA