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3.2.3
Binary reading
[A.3.3.2 CONTROL command / Control register A#1/B#1= B'xxxxxx0x']
Following three parameters are available when binarizing the image. The 256 levels of the density at
each pixel is processed by Contrast and binarized by fixed Threshold (Density). When the White
level following is se ON, the white level of the CCD output follows the background of the document.
So this is useful for line art drawing but not for photograph.
Parameter
Binary reading ON
Density *1
8 step setting ON
256 step setting ON
Contrast
Mostly soft contrast
Normal
Mostly sharp contrast
White level
Set from the operator panel
following
White level following ON.
The threshold follows the
background of the document.
*2
White level following OFF.
The threshold do not follow
the background of the
document.
*1
When the IPC-2D or IPC-3D is installed, the value varies along with the control of DTC mode or IPC
mode.
*2
3 mm from top of the document must be white or drop-out color (See section 2.6.5)
Table 3.6 Parameter of Binarization
set from operator panel
Light
Normal
Dark
Light
to
Dark
Control register No.
A#2/B#2
A#19
A#1/B#1
A#19
A#20/B#20
A#21/B#21
A#1/B#1
3.2 Basic image functions
value
Default
B'xxxxxx0x'
ON
B'xxxxxxx0'
Set from
B'xxxx00xx'
operator
B'xxxx1000'
panel
to
B'xxxx1100
to
B'xxxx1111'
B'xxxxxxx1'
X'01'
to
X'FF'
X'01'
to
X'80'
X'80'
to
X'FF'
B'0xxxxxxx'
ON
B'10xxxxxx'
B'11xxxxxx'
3-9
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