Ricoh B082 Service Manual page 259

SP4 Mode Number
4903* 93* Filter Adj.: Photo (Mag.%)
257 – 400%
4904* IPU Setting
1 Grayscale Photo Mode
2* Quality Photo Mode
3* Density Setting for Low
Density Original Mode
4* Density Setting for Copied
Original Mode
SM
SERVICE PROGRAM MODE TABLES
Function and [Setting]
Adjusts the MTF filter coefficient magnification
setting selected with SP4903 036 to adjust clarity
of images copied in the Photo mode and enlarged
in the range 257% to 400%.
•
Specifically, this settings affects how edges
are detected at sharp edges and at faint
borders where no edges exist. A lower setting
reproduces a noticeable difference in the
appearance of sharp and faint borders, and a
higher setting reduces this effect.
•
While selecting a lower setting makes it easier
to distinguish the differences between sharp
and faint borders, this can also cause moiré to
appear in the image. A higher setting can
weaken the clarity of edges.
[0~15 / 15 / 1]
( 6.2 Image Processing)
!
Selects the method of grayscale processing for the
Photo Mode.
[0~1 / 0 / 1]
0: Dithering and smoothing. This setting is the
same as the setting for "Print Photo" selected
on the operation panel in Photo Mode.
Dithering can be adjusted with SP4903 037.
1: Error diffusion and MTF filter processing. This
setting is the same as the setting for "Normal"
or "Glossy Photo" selected on the operation
panel in Photo Mode. Error diffusion can be
adjusted with SP4903 036 and 038.
Selects the size of the dither matrix for the photo
mode.
[0~3 / 1 / 1]
Value Method
0 Dither 8 x 8
1 Dither 8 x 8
2 Dither 6 x 6
3 Dither 4 x 4
Selects the density γ factor for the low-density
original mode.
[0~1 / 0 / 1]
0: Selects γ normal density.
1: Digitizes to near binary image.
Use to achieve better balance between text and
images, correct shadows that appear around text
in handwritten documents, to enhance documents
written in pencil, or to achieve stark contrast
when copying blueprints, building plans, etc.
Setting same as above.
[0~1 / 0 /1 step]
5-33
Lines Effect
75 Screening
106 Best grayscale
142 Good grayscale
212 Good resolution
B079/B082