SP4
Mode Number
4903*
Filter Adj.: Text/Photo
81*
(Mag.%) 25-64%
82* Filter Strength: Text/Photo
(Edge) 65-154%
83*
Filter Adj.: Text/Photo
(Edge Det.) 65-154%
SM
SERVICE PROGRAM MODE TABLES
Function and [Setting]
Adjusts the filter coefficient magnification setting
selected with SP4903 039 to adjust the clarity of
edges of images copied in the Text/Photo mode
and enlarged in the range 25% to 64%.
•
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 / 12 / 1]
(
6.2 Image Processing)
!
Selects the strength of the MTF coefficient filter
setting selected with SP4903 043 to adjust the
clarity of edges of images copied in the
Text/Photo mode and enlarged in the range 65%
to 154%. A higher setting increases the strength
of the effect, and a lower setting decreases the
effect. While a higher setting can improve the
clarity of text and thin lines, a very high setting
can increase the incidence of moiré.
[0~3 / 3 / 1]
(
6.2 Image Processing)
!
Selects the MTF filter coefficient of the edge
detection level of the filter setting selected with
SP4903 043 to adjust the clarity of edges in
images copied in the Text/Photo mode and
enlarged in the range 65% to 154%. A lower
setting increases the number of edges detected,
and a higher setting decreases the number of
edges detected.
•
A higher setting affects the density of lines
with a steep slope and to a lesser degree
affects the density of gently sloping lines.
•
Areas other than sloping lines are not affected
by this adjustment.
•
If edge detection is set high, then the range of
edge detection is expanded to include any
background.
[0~15 / 3 / 1]
0: Most edges detected. Settings near zero
increase the range of the SP4903 043 setting.
15: Fewest edges detected. Settings near 15
decrease the range of the SP3903 043
setting.
(!6.2 Image Processing)
5-29
B079/B082