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Image Functions
This function allows a customer to select a threshold curve. Several different curves are prepared, one is
the OCR type and other is the image type. The characteristic of the curve is deferent between IPC-2D and
IPC-3D.
IPC-2D:
The image type curve has steeper inclination in the middle of the curve. For OCR type
curve, the customer can select type (inclination) and density level.
PC-3D:
8 curves are available which adjusts the sensitivity of the image
The parameter of Dynamic Threshold are as follows.
Table 3.11 The deference of Dynamic Threshold Curve parameter
Option
0 for OCR
to
IPC-2D
5 for OCR
6 for Image
7 for Image
0
to
IPC-3D
4
to
7
3-16
Control
Parameter
register
No
A#3/B#3
Value
Selectable parameter
B'xxxxx000'
Brightest
to
B'xxxxx101'
Darkest
B'xxxxx110'
Makes bright image to dark
B'xxxxx111'
Makes dark image to bright
B'xxxxx000'
Decrease the noise
to
B'xxxxx100'
Normal
to
B'xxxxx111'
Makes image sharp but
increases noise
Default
6 for image
4
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