Oce 3121, Техническое и сервисное руководство

Страница: 297 / 908

C
o
nf
id
en
ti
a
l ©
19
98
O
c
é
-T
ec
hn
ol
o
g
ie
s
B
.V
.
ed.1 08 Image processing 521
b) Density Processing
The correction curve for density processing varies according to the following:
1
Setting of the Copy Density key on the control panel.
2
Results of AE measurement
3 Selection of text and photo mode, or photo mode
4
Results of OPC resistance
According to the setting of the Copy Density, the curve will be for darker or
lighter: see figure A.
When text/photo or photo mode is selected, the curve shown in figure B will
be selected to ensure good gradation and faithful reproduction of the density of
a document.
The AE may be ‘priority on speed’ (default) or ‘priority on image quality’.
(Here, the discussions are on ‘priority on image quality’; for ‘priority on
speed’, see ((((()
In ‘priority on image quality’, the density correction curve is varied according
to the type of document.
In ‘priority on image quality’, the scanner is moved forward to suit the size of
the detected document, thereby executing full scanning for measuring the den-
sity of the entire document.
A
B
Copy density Copy density
Darker
Lighter
Text mode
Text mode
Text and photo
mode, and photo
mode
Density of document
Density of document