Ricoh B079 Service Manual page 256

SERVICE PROGRAM MODE TABLES
SP4 Mode Number
4903* 84* Filter Adj.: Text/Photo
(Mag.%) 65-154%
85* Filter Strength: Text/Photo
(Edge) 155-256%
86* Filter Adj.: Text/Photo (Edge
Det.) 155-256%
B079/B082
CÓPIA NÃO CONTROLADA
Function and [Setting]
Adjusts the of the filter coefficient magnification
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%.
•
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 047 to adjust the
clarity of edges of images copied in the
Text/Photo mode and enlarged in the range 155%
to 256%. 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 047 to adjust the clarity of edges in
images copied in the Text/Photo mode and
enlarged in the range 155% to 256%. 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: Fewest edges detected. Settings near zero
increase the range of the SP4903 047 setting.
15: Most edges detected. Settings near 15
decrease the range of the SP3903 047
setting.
( 6.2 Image Processing)
!
5-30
CÓPIA NÃO CONTROLADA
SM