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(2) Threshold value setting
The IV-S20 treats the "areas darker than the lower limit value" or "brighter than the upper limit
value" as "black." It treats that the areas between the upper limit value and lower limit value as
"white." However, if the white-black reverse function is enabled, conversion to white/black will be
reversed. Normally, if you want to use only one threshold value for binary conversion, set the
upper limit value to "255." Then you only need to adjust the lower limit value to a threshold value
that works for our application.
(Captured image)
Binary conversion
(upper limit A, lower limit B)
[Measurement programs which are affected by these settings]
Degree of match inspection for shape and size (binary conversion: page 9-51)
Distance and angle measurement (center of gravity: page 9-62)
Area measurement by binary conversion (page 9-85)
Counting quantities by binary conversion (page 9-93)
Identifying object by binary conversion (page 9-101)
Point measurement (binary images: page 9-109)
(3) Setting window boundaries (enable/disable)
This function enables and disables the labeling (object identification) of binary images located
that cross over the window frame boundary.
Binary
conversion
[Measurement programs which are affected by these settings]
Distance and angle measurement (center of gravity: page 9-62)
Counting quantiities by binary conversion (page 9-93)
Identifying object by binary conversion (page 9-101)
Threshold valve B
Binary conversion
(upper limit 255, lower limit A)
Threshold valve A
Binary conversion
(upper limit 255, lower limit B)
(Threshold value)
255
Upper
limit A
Lower
limit B
0
Window
Labeling
(enable
window
boundaries)
Labeling
(disable window boundary)
1
2
9-7
Black
White
Black
1
2
3
4
Images 1 and 3 cross over the
window frame edges and are
measured together with the
areas outside the window frame
edges.
Condition: Labeling
(in order they are
connected)
Shared settings
(Threshold value)
255
White
Lower
limit A
Black
B
0
(Threshold value)
255
A
White
Lower
limit B
Black
0
9
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